CN106788921B - Multi-CPE redundant link system and method - Google Patents

Multi-CPE redundant link system and method Download PDF

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CN106788921B
CN106788921B CN201611050932.2A CN201611050932A CN106788921B CN 106788921 B CN106788921 B CN 106788921B CN 201611050932 A CN201611050932 A CN 201611050932A CN 106788921 B CN106788921 B CN 106788921B
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signal tunnel
priority
cpe1
cpe2
tunnel
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CN106788921A (en
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杨宾和
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Shanghai Huawei Technologies Co Ltd
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Shanghai Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/22—Alternate routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery

Abstract

The embodiment of the invention discloses a multi-CPE redundant link system which is used for saving equipment cost. The system of the embodiment of the invention comprises: two layers of equipment, a first customer premises equipment CPE1, a second customer premises equipment CPE2 and routing equipment; the two-layer equipment is connected with the local area network interfaces of the CPE1 and the CPE2 through a Virtual Routing Redundancy Protocol (VRRP); the CPE1 is connected with the routing equipment through a first wide area network interface to form a first signal tunnel; the CPE2 is connected with the routing equipment through a second wide area network interface to form a second signal tunnel; CPE1 is used to set a first priority of CPE1 in VRRP; CPE2 is used to set a second priority of CPE2 in VRRP, the second priority being lower than the first priority; the routing equipment is used for setting Metric1 corresponding to the first signal tunnel and Metric2 corresponding to the second signal tunnel, and Metric1 is larger than Metric 2; the first signal tunnel is used for transmitting an uplink message and a downlink message; the second signal tunnel is used for transmitting the uplink message and the downlink message when the first signal tunnel is forbidden.

Description

Multi-CPE redundant link system and method
Technical Field
The present invention relates to the field of communications, and in particular, to a multi-CPE redundant link system and method.
Background
The wireless Customer Premises Equipment (CPE) is restricted by the industry chain as an access device, and the reliability of the CPE is difficult to meet the carrier-grade requirements, which is a weak link of reliability. In the scenario of a non-redundant link, the CPE will cause bearer service to be unavailable once it fails. Therefore, for a scenario with high network reliability requirements, redundant wireless links need to be provided.
The redundant link provided by the prior art is as shown in fig. 1, and is established between a three-layer device (three-layer switch/router) based on a CPE side and a router in a core network.
This solution is not commercially available because the CPE is a massive access device and the cost of equipment for deploying three layers of equipment on the CPE side in a large-scale networking is too high.
Disclosure of Invention
The embodiment of the invention provides a multi-CPE redundant link system and a method, which are used for saving equipment cost.
In view of this, a first aspect of the embodiments of the present invention provides a multi-CPE redundant link system, including: layer two devices, CPE1, CPE2, and routing devices;
the two-layer equipment is connected with local area network interfaces of CPE1 and CPE2 through VRRP;
the CPE1 is connected with the routing equipment through a first wide area network interface to form a first signal tunnel;
the CPE2 is connected with the routing equipment through a second wide area network interface to form a second signal tunnel;
CPE1 is used to set a first priority of CPE1 in VRRP;
CPE2 is used to set a second priority of CPE2 in VRRP, the second priority being lower than the first priority;
the routing equipment is used for setting a first route degree Metric1 corresponding to the first signal tunnel and a second route degree Metric2 corresponding to the second signal tunnel, wherein Metric1 is larger than Metric 2;
the first signal tunnel is used for transmitting an uplink message and a downlink message;
the second signal tunnel is used for transmitting the uplink message and the downlink message when the first signal tunnel is forbidden.
It should be understood that Metric, which is a Metric for determining the best path to reach a destination, may include other parameters such as path length, or bandwidth, or load, or communication cost.
The multi-CPE redundant link system provided by the embodiment of the invention adopts two layers of equipment to be connected with the CPE, a first signal tunnel between the CPE1 and the routing equipment is correspondingly established, a second signal tunnel between the CPE2 and the routing equipment is correspondingly set up to have a first priority of the CPE1 in the VRRP, and a second priority of the CPE2 in the VRRP is lower than the first priority, so that messages in the uplink direction are forwarded to the CPE1 by default, and are forwarded to the CPE2 when a fault occurs; and setting a first route degree Metric1 corresponding to the first signal tunnel and a second route degree Metric2 corresponding to the second signal tunnel, wherein Metric1 is larger than Metric2, so that the message in the downlink direction is forwarded to the first signal tunnel by default, and is forwarded to the second signal tunnel when a fault occurs. According to the scheme, the two-layer equipment can be adopted to establish the multi-CPE redundant link, and compared with the multi-CPE redundant link based on the three-layer equipment, the equipment cost can be saved.
With reference to the first aspect of the embodiment of the present invention, in a first implementation manner of the first aspect of the embodiment of the present invention, the CPE1 is further configured to modify the first priority when detecting that the first signal tunnel fails, where the modified first priority is lower than the second priority;
the routing device is further configured to disable the first signal tunnel when a failure of the first signal tunnel is detected.
The embodiment of the invention provides a specific mode that the first signal tunnel is forbidden and the message is transmitted through the second signal tunnel, thereby improving the realizability of the scheme.
With reference to the first implementation manner of the first aspect of the embodiment of the present invention, in a second implementation manner of the first aspect of the embodiment of the present invention, the CPE1 is further configured to, when it is detected that the failure of the first signal tunnel is repaired, restore the first priority, where the restored first priority is higher than the second priority;
the routing device is further configured to enable the first signal tunnel upon detecting a failover of the first signal tunnel.
In the embodiment of the invention, after the fault of the first signal tunnel is repaired, the message transmission by using the first signal tunnel can be recovered, so that the flexibility of the scheme is improved.
With reference to the first aspect of the embodiment of the present invention, in a third implementation manner of the first aspect of the embodiment of the present invention, the CPE1 is further configured to disable connectivity detection of the first signal tunnel when detecting that the local area network interface of the CPE1 is disconnected;
the routing device is further configured to disable the first signal tunnel when detecting that connectivity detection of the first signal tunnel is disabled.
The embodiment of the invention provides another specific mode for transmitting the message through the second signal tunnel when the first signal tunnel is forbidden, thereby improving the flexibility of the scheme.
With reference to the third implementation manner of the first aspect of the present invention, in a fourth implementation manner of the first aspect of the embodiment of the present invention, the CPE1 is further configured to enable connectivity detection of the first signal tunnel when detecting that the local area network interface of the CPE1 recovers connection;
the routing device is further configured to enable the first signal tunnel upon detecting connectivity detection enablement of the first signal tunnel.
In the embodiment of the invention, after the local area network interface of the CPE1 is recovered to be connected, the first signal tunnel can be recovered to be used for message transmission, so that the flexibility of the scheme is improved.
With reference to the first aspect of the embodiment of the present invention, in a fifth implementation manner of the first aspect of the embodiment of the present invention, the system further includes: a third customer premises equipment CPE 3;
the second-layer equipment is connected with a local area network interface of the CPE3 through VRRP;
the CPE3 is connected with the routing equipment through a third wide area network interface to form a third signal tunnel;
the CPE3 is used for setting the third priority of the CPE3 in the VRRP, and the third priority is lower than the first priority and the second priority;
the routing equipment is also used for setting a third degree of routing Metric3 corresponding to the third signal tunnel, wherein Metric3 is smaller than Metric 2;
the third signal tunnel is used for transmitting the uplink message and the downlink message when the first signal tunnel and the second signal tunnel are both forbidden.
The redundant link system in the embodiment of the invention further comprises a CPE3, the CPE3 and the routing equipment form a third signal tunnel, and when the signal tunnels corresponding to the CPE1 and the CPE2 are both forbidden, message transmission can be carried out through the third signal tunnel, so that the reliability of the scheme is improved.
A second aspect of an embodiment of the present invention provides a multi-CPE redundant link system, including: layer two devices, CPE1, CPE2, and routing devices;
the two-layer equipment is connected with local area network interfaces of CPE1 and CPE2 through a first virtual routing redundancy protocol VRRP1, and VRRP1 corresponds to a first data stream;
the second layer of equipment is connected with local area network interfaces of the CPE1 and the CPE2 through a second virtual routing redundancy protocol VRRP2, and the VRRP2 corresponds to a second data stream;
the CPE1 is connected with the routing equipment through a first wide area network interface to form a first signal tunnel;
the CPE2 is connected with the routing equipment through a second wide area network interface to form a second signal tunnel;
CPE1 is used to set a first priority of CPE1 in VRRP1 and a second priority of CPE1 in VRRP 2;
CPE2 is used to set a third priority of CPE2 in VRRP1 and a fourth priority of CPE2 in VRRP2, the third priority being lower than the first priority and the fourth priority being higher than the second priority;
the routing equipment is used for setting the corresponding Metric1 of the first data flow in the first signal tunnel, the corresponding Metric2 of the first data flow in the second signal tunnel, the corresponding Metric3 of the second data flow in the first signal tunnel and the corresponding Metric4 of the second data flow in the second signal tunnel, wherein Metric1 is larger than Metric2, and Metric3 is smaller than Metric 4;
the first signal tunnel is used for transmitting a first data stream in an uplink direction and a first data stream in a downlink direction;
the second signal tunnel is used for transmitting a second data stream in the uplink direction and a second data stream in the downlink direction.
The multi-CPE redundant link system provided by the embodiment of the invention can realize the shunt transmission of the data stream, reasonably utilize the redundant CPE and improve the transmission efficiency.
With reference to the second aspect of the embodiment of the present invention, in a first implementation manner of the second aspect of the embodiment of the present invention, the first signal tunnel is further configured to transmit a second data stream in an uplink direction and a second data stream in a downlink direction when the second signal tunnel is disabled;
the second signal tunnel is further configured to transmit the first data flow in the downstream direction and the first data flow in the upstream direction when the first signal tunnel is disabled.
In the embodiment of the invention, when the first signal tunnel is forbidden, the first data stream can be transmitted through the second signal tunnel, and when the second signal tunnel is forbidden, the second data stream can be transmitted through the first signal tunnel, so that tunnel resources are reasonably utilized, and the reliability of the scheme is improved.
A third aspect of the embodiments of the present invention provides a method for transmitting a multi-CPE redundant link, where the method includes: firstly, each device establishes connection through an interface, specifically, a first signal tunnel is established between a CPE1 and a routing device through a first wide area network interface, a second signal tunnel is established between a CPE2 and the routing device through a second wide area network interface, and a second layer device establishes connection with a CPE1 and a CPE2 through a VRRP; and then carrying out related setting on each device, specifically, setting a first priority of a CPE1 in a VRRP by a CPE1, setting a second priority of a CPE2 in the VRRP by a CPE2, wherein the second priority is lower than the first priority, setting Metric1 corresponding to a first signal tunnel and Metric2 corresponding to a second signal tunnel by a routing device, and setting Metric1 to be larger than Metric 2. Based on the above arrangement, the CPE1 transmits the uplink message and the downlink message through the first signal tunnel, and when the CPE1 is disabled through the first signal tunnel, the CPE2 transmits the uplink message and the downlink message through the second signal tunnel.
The multi-CPE redundant link transmission method provided by the embodiment of the invention adopts two layers of equipment to be connected with the CPE, a first signal tunnel between the CPE1 and the routing equipment is correspondingly established, a second signal tunnel between the CPE2 and the routing equipment is correspondingly set up a first priority of the CPE1 in a VRRP, a second priority of the CPE2 in the VRRP is lower than the first priority, so that messages in an uplink direction are forwarded to the CPE1 by default, and are forwarded to the CPE2 when a fault occurs; and setting a first route degree Metric1 corresponding to the first signal tunnel and a second route degree Metric2 corresponding to the second signal tunnel, wherein Metric1 is larger than Metric2, so that the message in the downlink direction is forwarded to the first signal tunnel by default, and is forwarded to the second signal tunnel when a fault occurs. According to the scheme, the two-layer equipment can be adopted to establish the multi-CPE redundant link, and compared with the multi-CPE redundant link based on the three-layer equipment, the equipment cost can be saved.
With reference to the third aspect of the embodiment of the present invention, in a first implementation manner of the third aspect of the embodiment of the present invention, before the CPE2 transmits the uplink packet and the downlink packet through the second signal tunnel, the first signal tunnel fails, when the routing device detects the failure, the routing device disables the first signal tunnel, and when the CPE1 detects the failure, the CPE1 modifies the first priority so that the modified first priority is lower than the second priority.
The embodiment of the invention provides a specific implementation mode that the first signal tunnel is forbidden and the message transmission is carried out through the second signal tunnel, thereby improving the realizability of the scheme.
With reference to the first implementation manner of the third aspect of the present invention, in a second implementation manner of the third aspect of the present invention, after the CPE2 transmits the uplink packet and the downlink packet through the second signal tunnel, the fault of the first signal tunnel is repaired, when the CPE1 detects that the fault is repaired, the CPE1 recovers the first priority, the recovered first priority is higher than the second priority, and when the routing device detects that the fault is repaired, the routing device enables the first signal tunnel.
The embodiment of the invention provides a specific implementation mode for recovering the message transmission by using the first signal tunnel after the first signal tunnel is repaired, thereby improving the realizability of the scheme.
With reference to the third aspect of the embodiment of the present invention, in a third implementation manner of the third aspect of the embodiment of the present invention, before the CPE2 transmits the uplink packet and the downlink packet through the second signal tunnel, the connection between the CPE1 and the layer two device is disconnected, when the CPE1 detects that the connection is disconnected, the CPE1 disables connectivity detection of the first signal tunnel, and when the connectivity detection of the first signal tunnel is disabled, the routing device disables the first signal tunnel.
The embodiment of the invention provides another specific implementation mode that the first signal tunnel is forbidden and the message transmission is carried out through the second signal tunnel, thereby improving the flexibility of the scheme.
With reference to the third implementation manner of the third aspect of the present invention, in a fourth implementation manner of the third aspect of the embodiment of the present invention, after the CPE2 transmits the uplink packet and the downlink packet through the second signal tunnel, the connection between the CPE1 and the second tier device is recovered, when the CPE1 detects that the connection between the CPE1 and the second tier device is recovered, the CPE1 enables connectivity detection of the first signal tunnel, and when the routing device detects that connectivity detection of the first signal tunnel is enabled, the first signal tunnel is enabled.
The embodiment of the invention provides a specific implementation mode for recovering the message transmission by using the first signal tunnel after the connection is recovered, thereby improving the flexibility of the scheme.
With reference to the third aspect of the embodiment of the present invention, in a fifth implementation manner of the third aspect of the embodiment of the present invention, the method further includes:
the CPE3 establishes a third signal tunnel with the routing equipment through a third wide area network interface and establishes connection with the second-layer equipment through VRRP; the CPE3 sets a third priority of the CPE3 in the VRRP, wherein the third priority is lower than the first priority and the second priority; the routing equipment sets a third degree of routing Metric3 corresponding to the third signal tunnel, wherein Metric3 is smaller than Metric 2; when it is determined that both the first signal tunnel and the second signal tunnel are disabled, the CPE3 transmits the uplink message and the downlink message through the third signal tunnel.
The multi-CPE redundant link method provided by the embodiment of the invention also accesses the CPE3, establishes the third signal tunnel, and can transmit the messages in the uplink and downlink directions when the first signal tunnel and the second signal tunnel are forbidden, thereby improving the stability of the scheme.
A fourth aspect of the present invention provides a method for transmitting a multi-CPE redundant link, where the method includes: firstly, each device establishes connection through an interface, specifically, a first signal tunnel is established between a CPE1 and a routing device through a first wide area network interface, a second signal tunnel is established between a CPE2 and the routing device through a second wide area network interface, a first connection between a second layer device and a CPE1 and a CPE2 is established between the second layer device and the CPE1, and a second connection between the second layer device and the CPE1 and the CPE2 is established through a VRRP 2; then, the respective devices perform related settings, specifically, CPE1 sets a first priority of CPE1 in VRRP1 and a second priority of CPE1 in VRRP2, CPE2 sets a third priority of CPE2 in VRRP1 and a fourth priority of CPE2 in VRRP2, the third priority being lower than the first priority and the fourth priority being higher than the second priority; the routing equipment sets a corresponding first route degree Metric1 of the first data flow in the first signal tunnel, a corresponding second route degree Metric2 of the first data flow in the second signal tunnel, a corresponding third route degree Metric3 of the second data flow in the first signal tunnel and a corresponding fourth route degree Metric4 of the second data flow in the second signal tunnel, wherein Metric1 is larger than Metric2, and Metric3 is smaller than Metric 4; performing data transmission based on the above setting, specifically, CPE1 transmits the first data stream in the uplink direction and the first data stream in the downlink direction through the first signal tunnel; CPE2 transmits the second data stream in the upstream direction and the second data stream in the downstream direction through the second signal tunnel.
The multi-CPE redundant link transmission method provided by the embodiment of the invention can realize data shunting, the CPE1 is used for transmitting the first data stream, the CPE2 is used for transmitting the second data stream, each CPE is reasonably utilized, and the data transmission efficiency is improved.
With reference to the fourth aspect of the embodiment of the present invention, in a first implementation manner of the fourth aspect of the embodiment of the present invention, the method further includes: when it is determined that the second signal tunnel is disabled, CPE1 transmits the second data stream in the upstream direction and the second data stream in the downstream direction through the first signal tunnel; CPE2 transmits the first data stream in the downstream direction and the first data stream in the upstream direction through the second signal tunnel when it is determined that the first signal tunnel is disabled.
The embodiment of the invention can transmit the first data flow through the second signal tunnel when the first signal tunnel is forbidden and transmit the second data flow through the first signal tunnel when the second signal tunnel is forbidden, thereby improving the reliability of the scheme.
According to the technical scheme, the embodiment of the invention has the following advantages:
the multi-CPE redundant link system provided by the embodiment of the invention adopts two layers of equipment to be connected with the CPE, a first signal tunnel between the CPE1 and the routing equipment is correspondingly established, a second signal tunnel between the CPE2 and the routing equipment is correspondingly set up to have a first priority of the CPE1 in the VRRP, and a second priority of the CPE2 in the VRRP is lower than the first priority, so that messages in the uplink direction are forwarded to the CPE1 by default, and are forwarded to the CPE2 when a fault occurs; and setting a first route degree Metric1 corresponding to the first signal tunnel and a second route degree Metric2 corresponding to the second signal tunnel, wherein Metric1 is larger than Metric2, so that the message in the downlink direction is forwarded to the first signal tunnel by default, and is forwarded to the second signal tunnel when a fault occurs. According to the scheme, the two-layer equipment can be adopted to establish the multi-CPE redundant link, and compared with the multi-CPE redundant link based on the three-layer equipment, the equipment cost can be saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present invention.
FIG. 1 is a schematic diagram of one embodiment of a prior art multi-CPE redundant link system;
FIG. 2 is a schematic diagram of an embodiment of a multi-CPE redundant link system in accordance with embodiments of the present invention;
FIG. 3 is a schematic diagram of a failure of a first signal tunnel of a multi-CPE redundant link system in an embodiment of the present invention;
fig. 4 is a schematic diagram of a CPE1 access link failure of a multi-CPE redundant link system in an embodiment of the present invention;
FIG. 5 is a schematic diagram of another embodiment of a multi-CPE redundant link system in an embodiment of the invention;
FIG. 6 is a schematic diagram of another embodiment of a multi-CPE redundant link system in accordance with embodiments of the present invention;
fig. 7 is a flowchart of an embodiment of a multi-CPE redundant link transmission method according to an embodiment of the present invention;
fig. 8 is a flowchart of another embodiment of a multi-CPE redundant link transmission method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that the technical solution of the embodiment of the present invention can be applied to various communication systems, such as a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a long Term Evolution (L ong Term Evolution, L TE) System, a L TE Frequency Division Duplex (FDD) System, a L TE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), or a Worldwide Interoperability for Microwave Access (WiMAX) communication System.
It should be understood that the Base Station (BS) in the embodiment of the present invention may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, or an evolved Node B (eNB or e-NodeB) in L TE, and the embodiment of the present invention is not limited thereto.
It should be understood that the Terminal in the embodiment of the present invention includes, but is not limited to, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), a Mobile phone (Mobile phone), a handset (handset), a portable device (portable device), and the like, the user equipment may communicate with one or more core networks through a Radio Access Network (RAN), for example, the Terminal may be a Mobile phone (or a cellular phone), a computer with a wireless communication function, and the user equipment may also be a portable, pocket, hand-held, computer-embedded, or vehicle-mounted Mobile device.
To facilitate understanding of the embodiments of the present invention, some terms related to the embodiments of the present invention are described below:
backhaul, also known as signal tunneling, is an arrangement in which signaling is the reliable transmission of signaling from one gateway to another media gateway over a packet switched network, without the gateway needing to understand and interpret the signaling information. In wireless technology, backhaul refers to the function of transporting voice and data traffic from a source site to a switch.
The degree of routing (Metric) refers to a variable value obtained after the routing protocol algorithm performs a calculation, such as network delay, and its purpose is to determine the best route. Metric is a Metric used by routing algorithms to determine the best path to reach a destination, such as path length. And error rate, routing delay, bandwidth, load, communication cost and the like can be used as the metering standard of the optimal path and can be used as Metric.
A two-tier device refers to a device operating at the data link layer. The two-layer switch can identify MAC address information in the data packet, forward according to the MAC address, and record the MAC address and the corresponding port in an address table in the two-layer switch.
Referring to fig. 2, an embodiment of a multi-CPE redundant link system in an embodiment of the present invention includes: a layer two device 201, a first client terminal device 202, a second client terminal device 203 and a routing device 204;
the two-layer device 201 is connected to the lan interfaces of the first client terminal device 202 and the second client terminal device 203 through a Virtual Router Redundancy Protocol (VRRP);
the first client terminal device 202 is connected with the routing device 204 through the first wide area network interface to form a first signal tunnel;
the second client terminal device 203 is connected to the routing device 204 through a second wide area network interface, which is shaped as a second signal tunnel;
the first client terminal device 202 is used for setting a first priority of the first client terminal device 202 in the VRRP;
the second client terminal device 203 is used for setting a second priority of the second client terminal device 203 in the VRRP, and the second priority is lower than the first priority;
the routing device 204 is configured to set a first route degree Metric1 corresponding to the first signal tunnel and a second route degree Metric2 corresponding to the second signal tunnel, where Metric1 is greater than Metric 2;
based on the above setting, since the priority of the first client terminal apparatus 202 is higher than that of the second client terminal apparatus 203, the first client terminal apparatus 202 preferentially robs an Interconnection Protocol (IP) between virtual networks in contention of VRRP between the two client terminal apparatuses, and becomes a gateway. Therefore, the first customer premises equipment is used as the main CPE, and the second customer premises equipment is used as the standby CPE. When the second layer device 201 receives the uplink direction message, the uplink direction message is forwarded to the main CPE by default, that is, the uplink direction message is transmitted through the first signal tunnel; when the first signal tunnel is disabled, after receiving the uplink direction message, the layer two device 201 forwards the uplink direction message to the standby CPE, that is, transmits the uplink direction message through the second signal tunnel;
based on the above setting, since the first routing Metric1 corresponding to the first signal tunnel is greater than the second routing Metric2 corresponding to the second signal tunnel, that is, the path from the target network to the first signal tunnel set in the routing device 204 is better than the path from the target network to the second signal tunnel, when the routing device 204 receives the downlink direction packet, the uplink direction packet is forwarded to the first signal tunnel by default, and when the first signal tunnel is disabled, the routing device 204 receives the uplink direction packet and forwards the uplink direction packet to the second signal tunnel.
The multi-CPE redundant link system provided by the embodiment of the invention adopts two layers of equipment to be connected with the CPE, a first signal tunnel between the CPE1 and the routing equipment is correspondingly established, a second signal tunnel between the CPE2 and the routing equipment is correspondingly set up to have a first priority of the CPE1 in the VRRP, and a second priority of the CPE2 in the VRRP is lower than the first priority, so that messages in the uplink direction are forwarded to the CPE1 by default, and are forwarded to the CPE2 when a fault occurs; and setting a first route degree Metric1 corresponding to the first signal tunnel and a second route degree Metric2 corresponding to the second signal tunnel, wherein Metric1 is larger than Metric2, so that the message in the downlink direction is forwarded to the first signal tunnel by default, and is forwarded to the second signal tunnel when a fault occurs. According to the scheme, the two-layer equipment can be adopted to establish the multi-CPE redundant link, and compared with the multi-CPE redundant link based on the three-layer equipment, the equipment cost can be saved.
Based on the above-mentioned embodiment corresponding to fig. 2, there are many factors that cause the first signal tunnel to be disabled in practical applications, and several of them are described in detail below.
First, the first signal tunnel breaks down.
On the basis of fig. 2, please refer to fig. 3, when the first client terminal device 202 detects that the first signal tunnel fails, that is, the first signal tunnel is unavailable, the first client terminal device 202 modifies the first priority such that the modified first priority is lower than the second priority, that is, the priority of the first client terminal device 202 in the VRRP is lower than the priority of the second client terminal device 203 in the VRRP, at this time, the second client terminal device 203 seizes the virtual IP to become a gateway in contention of the VRRP by the two client terminal devices, and the second layer device 201 forwards the uplink message to the second client terminal device 203 and transmits the uplink message through the second signal tunnel. When the routing device 204 detects that the first signal tunnel fails, that is, the first signal tunnel is unavailable, the first signal tunnel is disabled, and at this time, the routing device 204 forwards the received downlink direction packet to the second signal tunnel, and transmits the downlink direction packet through the second signal tunnel.
Further, when the failure in the embodiment corresponding to fig. 3 is repaired, the first client terminal device 202 is further configured to restore the first priority when detecting that the failure of the first signal tunnel is repaired, that is, when detecting that the first signal tunnel is available, where the restored first priority is higher than the second priority, at this time, the first client terminal device 202 preempts the virtual IP in contention of VRRP by the two client terminal devices to become a gateway, and the layer two device 201 forwards the received uplink packet to the first client terminal device 202, and transmits the uplink packet through the first signal tunnel. When the routing device 204 detects that the fault is repaired, that is, when it detects that the first signal tunnel is available, the routing device 204 starts the first signal tunnel, and at this time, the routing device 204 forwards the received downlink direction packet to the first signal tunnel, and transmits the downlink direction packet through the first signal tunnel.
The embodiment of the invention provides a specific mode for transmitting the uplink message and the downlink message through the second signal tunnel when the first signal tunnel is forbidden, thereby improving the realizability of the scheme.
And secondly, the access link fails.
On the basis of fig. 2, please refer to fig. 4, when the first client terminal device 202 detects that the lan interface of the first client terminal device 202 is disconnected, that is, when it detects that the access link is failed, the first client terminal device 202 disables the connectivity detection of the first signal tunnel, at this time, only the second client terminal device 203 is in the VRRP, so that the second client terminal device 203 preempts the virtual IP to become a gateway, and the layer two device 201 forwards the received uplink packet to the second client terminal device 203, and transmits the uplink packet through the second signal tunnel. When the routing device 204 detects that the connectivity detection of the first signal tunnel is disabled, the routing device 204 disables the first signal tunnel, and at this time, the routing device 204 forwards the received downlink direction packet to the second signal tunnel, and transmits the downlink direction packet through the second signal tunnel.
Further, when the failure in the embodiment corresponding to fig. 4 is repaired, the first client terminal device 202 is further configured to enable connectivity detection of the first signal tunnel when detecting that the lan interface of the first client terminal device 202 recovers connection, at this time, the first client terminal device 202 preempts the virtual IP in contention of the VRRP by the two client terminal devices to become a gateway, and the layer two device 201 forwards the received uplink packet to the first client terminal device 202, and transmits the uplink packet through the first signal tunnel. When the routing device 204 detects that connectivity detection of the first signal tunnel is enabled, the routing device 204 enables the first signal tunnel, and at this time, the routing device 204 forwards the received downlink direction packet to the first signal tunnel, and transmits the packet through the first signal tunnel.
The embodiment of the invention provides another specific mode for transmitting the uplink message and the downlink message through the second signal tunnel when the first signal tunnel is forbidden, thereby improving the flexibility of the scheme.
In the embodiment corresponding to fig. 2, the redundant link system includes an active CPE and a standby CPE, and in order to improve reliability in practical applications, the redundant link system may include a plurality of standby CPEs, and the following description takes a redundant link system including two standby CPEs as an example, please refer to fig. 5, where another embodiment in the multi-CPE redundant link system according to the embodiment of the present invention includes: a layer two device 501, a first client terminal device 502, a second client terminal device 503, a third client terminal device 504, and a routing device 505;
the second layer device 501 is connected to the lan interfaces of the first client terminal device 502, the second client terminal device 503 and the third client terminal device 504 through VRRP;
the first client terminal device 502 is connected with the routing device 505 through the first wide area network interface to form a first signal tunnel;
the second client terminal device 503 is connected to the routing device 505 through a second wide area network interface, shaped as a second signal tunnel;
the third client terminal device 504 is connected to the routing device 505 through the third wide area network interface to form a third signal tunnel;
the first client terminal device 502 is used for setting a first priority of the first client terminal device 502 in the VRRP;
the second client terminal device 503 is configured to set a second priority of the second client terminal device 503 in the VRRP, where the second priority is lower than the first priority;
the third client terminal device 504 is configured to set a third priority of the third client terminal device 504 in the VRRP, where the third priority is lower than the first priority and the second priority;
the routing device 505 is configured to set a first degree of routing Metric1 corresponding to the first signal tunnel, a second degree of routing Metric2 corresponding to the second signal tunnel, and a third degree of routing Metric3 corresponding to the third signal tunnel, where Metric1> Metric2> Metric 3;
based on the above-described setting, since the priority of the first client terminal apparatus 502 is higher than the priority of the second client terminal apparatus 503 and the priority of the second client terminal apparatus 503 is higher than the priority of the third client terminal apparatus 504, the first client terminal apparatus 502 preferentially robs an Interconnection Protocol (IP) between virtual networks in contention of VRRP to become a gateway in the three client terminal apparatuses. Therefore, the first customer terminal device is used as the main CPE, the second customer terminal device is used as the first-choice spare CPE, and the third customer terminal device is used as the second-choice spare CPE. That is, after the second layer device 501 receives the uplink packet, it defaults to forward the uplink packet to the first client terminal device 502, that is, the uplink packet is transmitted through the first signal tunnel; when the first signal tunnel is disabled, after receiving the uplink message, the layer two device 501 forwards the uplink message to the second client terminal device 503, that is, transmits the uplink message through the second signal tunnel; when the first signal tunnel and the second signal tunnel are both disabled, the second layer device 501 receives the uplink packet and forwards the uplink packet to the third client terminal device 504, that is, transmits the uplink packet through the third signal tunnel.
Based on the above setting, since the first degree of routing Metric1 corresponding to the first signal tunnel is greater than the second degree of routing Metric2 corresponding to the second signal tunnel, and the second degree of routing Metric2 corresponding to the second signal tunnel is greater than the third degree of routing Metric3 corresponding to the third signal tunnel. That is, the path from the target network to the first signal tunnel is set to be better than the path from the target network to the second signal tunnel in the routing device 504, and the path from the target network to the second signal tunnel is set to be better than the path from the target network to the third signal tunnel. Therefore, after the routing device 505 receives the downlink direction packet, the uplink direction packet is forwarded to the first signal tunnel by default; when the first signal tunnel is disabled, the routing device 505 forwards the uplink message to the second signal tunnel after receiving the uplink message; when both the first signal tunnel and the second signal tunnel are disabled, the routing device 505 forwards the received uplink packet to the third signal tunnel.
The multi-CPE redundant link system in the embodiment of the invention comprises three CPEs, and when two CPEs are unavailable, the system can also transmit through the third CPE, thereby improving the reliability of the scheme.
Referring to fig. 6, another embodiment of the multi-CPE redundant link system in the embodiment of the present invention further provides another multi-CPE redundant link system, which can share a load through two or more CPEs, where the another embodiment of the multi-CPE redundant link system in the embodiment of the present invention includes: a two-tier device 601, a first client terminal device 602, a second client terminal device 603, and a routing device 604;
the layer two device 601 connects the lan interfaces of the first client terminal device 602 and the second client terminal device 603 through a first virtual redundancy protocol VRRP1, and the VRRP1 corresponds to the first data stream ①;
the layer two device 602 connects the local area network interfaces of the first client terminal device 602 and the second client terminal device 603 through a second virtual redundancy protocol VRRP2, and the VRRP2 corresponds to a second data stream ②;
the first client terminal device 602 is connected to the routing device 604 through the first wide area network interface to form a first signal tunnel;
the second client terminal device 603 is connected to the routing device 604 through the second wan interface to form a second signal tunnel;
the first client terminal device 602 is used to set a first priority of the first client terminal device 602 in the VRRP1 and a second priority of the first client terminal device 602 in the VRRP 2;
the second client terminal device 603 is configured to set a third priority of the second client terminal device 603 in the VRRP1 and a fourth priority of the second client terminal device 603 in the VRRP2, where the third priority is lower than the first priority and the fourth priority is higher than the second priority;
the routing device 604 is configured to set a first degree of routing Metric1 corresponding to the first data stream in the first signal tunnel, a second degree of routing Metric2 corresponding to the first data stream in the second signal tunnel, a third degree of routing Metric3 corresponding to the second data stream in the first signal tunnel, and a fourth degree of routing Metric4, Metric1> Metric2 corresponding to the second data stream in the second signal tunnel, and Metric3< Metric 4;
based on the above setting, since the priority of the first client terminal device 602 in the VRRP1 is higher than that of the second client terminal device 603, the first client terminal device 602 preferentially robs the virtual IP to become a gateway in the contention of the VRRP1 by the two client terminal devices, and therefore, when the second layer device 601 receives the first data stream ① in the upstream direction, the first data stream ① in the upstream direction is forwarded to the first client terminal device 602 by default, that is, the first data stream ① in the upstream direction is transmitted through the first signal tunnel;
since the priority of the second client terminal device 603 in the VRRP2 is higher than that of the first client terminal device 602, the second client terminal device has limited contention to the virtual IP to become a gateway in the contention of the VRRP2, so that when the second layer device 601 receives the second data stream ② in the upstream direction, the second data stream ② in the upstream direction is forwarded to the second client terminal device 603 by default, that is, the second data stream ② in the upstream direction is transmitted through the second signal tunnel;
based on the above setting, since the first route Metric1 corresponding to the first data flow in the first signal tunnel is greater than the second route Metric2 corresponding to the first data flow in the second signal tunnel, that is, the routing device 604 sets the path from the target network to the first signal tunnel of the first data flow to be better than the path from the target network to the second signal tunnel of the first data flow, when the routing device 604 receives the first data flow ① in the downstream direction, the first data flow ① in the downstream direction is forwarded to the first signal tunnel by default;
since the third degree of routing Metric3 corresponding to the second data stream in the first signal tunnel is smaller than the fourth degree of routing Metric4 corresponding to the second data stream in the second signal tunnel, that is, the routing device 604 sets the path of the second data stream from the target network to the second signal tunnel to be better than the path of the second data stream from the target network to the first signal tunnel, when the routing device 604 receives the second data stream ② in the downstream direction, the second data stream ② in the downstream direction is forwarded to the second signal tunnel by default.
The multi-CPE redundant link system provided by the embodiment of the present invention adopts a two-layer device to connect with a CPE, accordingly establishes a first signal tunnel between the CPE1 and a routing device, establishes a second signal tunnel between the CPE2 and a routing device, accordingly sets a first priority of the CPE1 in the VRRP1, sets a second priority of the CPE 59629, sets a third priority of the CPE2 in the VRRP1, sets a fourth priority of the CPE2, the third priority is lower than the first priority, and the fourth priority is higher than the second priority, so that the first data stream ① in an uplink direction is forwarded to the CPE1 by default, the second data stream in the uplink direction is forwarded to the CPE2 by default, sets a first data stream ① in a first routing degree Metric1 corresponding to the first signal tunnel, the first data stream is forwarded to a second routing degree via a second signal tunnel, the second data stream is forwarded to a third routing degree Metric2 corresponding to the second signal tunnel, the second data stream is forwarded to the CPE2 by default, the second routing degree via the second signal tunnel, the second redundancy tunnel, the second data stream 3, the redundancy tunnel is larger than the second routing degree of the CPE3, the redundancy tunnel is established, the redundancy tunnel, the multi-layer redundancy link system can reasonably increases the redundancy transmission cost of the downstream redundancy of the CPE3, and the downstream redundancy of the downstream signal tunnel, the multi-based on the second signaling tunnel, the redundancy link system can be reduced, the redundancy link, the redundancy of the second signaling device, the redundancy link, the redundancy of the redundancy link, the.
Based on the embodiment corresponding to fig. 6, in another embodiment of the multi-CPE redundant link system provided in the embodiment of the present invention, the first signal tunnel is further configured to transmit the second data stream in the uplink direction and the second data stream in the downlink direction when the second signal tunnel is disabled.
Two cases in which the second signal tunnel is disabled are explained below:
the first and second signal tunnels fail.
When the second client terminal device 603 detects that the second signal tunnel fails, that is, detects that the second signal tunnel is unavailable, the second client terminal device 603 modifies the fourth priority so that the modified fourth priority is lower than the second priority, that is, the priority of the second client terminal device 603 in the VRRP2 is lower than the priority of the first client terminal device 602 in the VRRP2, at this time, the first client terminal device 602 preempts the virtual IP to become a gateway in contention of the VRRP2 by the two client terminal devices, and the second layer device 601 forwards the second data stream in the uplink direction to the first client terminal device 602, and transmits the second data stream in the uplink direction through the first signal tunnel. And when the routing device 604 detects that the second signal tunnel fails, that is, detects that the second signal tunnel is unavailable, the second signal tunnel is disabled, and at this time, the routing device 604 forwards the received second data stream in the downlink direction to the first signal tunnel, and transmits the second data stream through the first signal tunnel.
Further, when the failure of the second signal tunnel is repaired, the second client terminal device 603 is further configured to restore the fourth priority when detecting that the failure is recovered, that is, when detecting that the second signal tunnel is available, where the recovered fourth priority is higher than the second priority, at this time, the second client terminal device 603 preempts the virtual IP to become a gateway in contention of the VRRP2 by the two client terminal devices, and the layer two device 601 forwards the received second data stream in the uplink direction to the second client terminal device 603, and transmits the second data stream in the uplink direction through the second signal tunnel. When the routing device 604 detects that the failure is recovered, that is, when it detects that the second signal tunnel is available, the routing device 604 enables the second signal tunnel, forwards the received second data stream in the downlink direction to the second signal tunnel, and transmits the second data stream through the second signal tunnel.
And secondly, the access link of the CPE2 is failed.
When the second client terminal device 603 detects that the lan interface of the second client terminal device 603 is disconnected, that is, when it detects that the access link fails, the second client terminal device 603 disables the connectivity detection of the second signal tunnel, at this time, only the first client terminal device 602 in the VRRP2 is present, so that the first client terminal device 602 preempts the virtual IP to become a gateway, and the layer two device 601 forwards the received second data stream in the upstream direction to the first client terminal device 602, and transmits the second data stream in the upstream direction through the first signal tunnel. And when the routing device 604 detects that the connectivity detection of the second signal tunnel is disabled, the routing device 604 disables the second signal tunnel, and at this time, the routing device 604 forwards the received second data stream in the downlink direction to the first signal tunnel, and transmits the second data stream through the first signal tunnel.
Further, when the access link failure of the second client terminal device 603 is repaired, the second client terminal device 603 is further configured to enable connectivity detection of the second signal tunnel when detecting that the lan interface of the second client terminal device 603 recovers connection, at this time, the two client terminal devices compete in the VRRP2, the second client terminal device 603 preempts the virtual IP to become a gateway, and the layer two device 601 forwards the received second data stream in the uplink direction to the second client terminal device 603, and transmits the second data stream in the uplink direction through the second signal tunnel. And when the routing device 604 detects that connectivity detection of the second signal tunnel is enabled, the routing device 604 enables the second signal tunnel, and at this time, the routing device 604 forwards the received second data stream in the downlink direction to the second signal tunnel, and transmits the second data stream through the second signal tunnel.
The embodiment of the invention provides a specific implementation mode for transmitting the second data stream through the first signal tunnel when various second signal tunnels are forbidden, thereby improving the flexibility of the scheme.
Based on any one of the embodiments corresponding to fig. 6, in another embodiment of the multi-CPE redundant link system provided in the embodiment of the present invention, the second signal tunnel is further configured to transmit the first data flow in the uplink direction and the first data flow in the downlink direction when the first signal tunnel is disabled.
Two cases in which the first signal tunnel is disabled are explained below:
first, the first signal tunnel breaks down.
Specifically, when the first client terminal device 602 detects that the first signal tunnel fails, that is, detects that the first signal tunnel is unavailable, the first client terminal device 602 modifies the first priority such that the modified first priority is lower than the third priority, that is, the priority of the first client terminal device 602 in the VRRP1 is lower than the priority of the second client terminal device in the VRRP1, at this time, the two client terminal devices compete in the VRRP1, the second client terminal device 603 preempts the virtual IP to become a gateway, the layer two device 601 forwards the first data stream in the upstream direction to the second client terminal device 603, and the first data stream in the upstream direction is transmitted through the second signal tunnel. And when the routing device 604 detects that the first signal tunnel fails, that is, detects that the first signal tunnel is unavailable, the first signal tunnel is disabled, and at this time, the routing device 604 forwards the received first data stream in the downlink direction to the second signal tunnel, and transmits the first data stream through the second signal tunnel.
Further, when the failure of the first signal tunnel is repaired, the first client terminal device 602 is further configured to restore the first priority when detecting that the failure is recovered, that is, when detecting that the first signal tunnel is available, where the first priority after recovery is higher than the third priority, and at this time, the two client terminal devices compete in the VRRP1, the first client terminal device 602 preempts the virtual IP to become a gateway, and the second layer device 601 forwards the received first data stream in the uplink direction to the first client terminal device 602, and transmits the first data stream in the uplink direction through the first signal tunnel. When the routing device 604 detects that the failure is recovered, that is, when it detects that the first signal tunnel is available, the routing device 604 forwards the received first data stream in the downlink direction to the first signal tunnel, and transmits the first data stream through the first signal tunnel.
And secondly, the access link of the CPE1 is failed.
When the first client terminal device 602 detects that the lan interface of the first client terminal device 602 is disconnected, that is, when it detects that the access link fails, the first client terminal device 602 disables the connectivity detection of the first signal tunnel, at this time, only the second client terminal device 603 in the VRRP1 is present, so that the second client terminal device 603 preempts the virtual IP to become a gateway, and the layer two device 601 forwards the received first data stream in the upstream direction to the second client terminal device 603, and transmits the first data stream in the upstream direction through the second signal tunnel. And when the routing device 604 detects that the connectivity detection of the first signal tunnel is disabled, the routing device 604 disables the first signal tunnel, and at this time, the routing device 604 forwards the received first data stream in the downlink direction to the second signal tunnel, and transmits the first data stream through the second signal tunnel.
Further, when the access link failure of the first client terminal device 602 is repaired, the first client terminal device 602 is further configured to enable connectivity detection of the first signal tunnel when detecting that the lan interface of the first client terminal device 602 recovers connection, at this time, two client terminal devices compete in VRRP1, the first client terminal device 602 preempts to the virtual IP to become a gateway, and the layer two device 601 forwards the received first data stream in the uplink direction to the first client terminal device 602, and transmits the first data stream in the uplink direction through the first signal tunnel. And when the routing device 604 detects that connectivity detection of the first signal tunnel is enabled, the routing device 604 enables the first signal tunnel, and at this time, the routing device 604 forwards the received first data stream in the downlink direction to the first signal tunnel, and transmits the first data stream through the first signal tunnel.
The embodiment of the invention provides a specific implementation mode for transmitting the second data stream through the first signal tunnel when various second signal tunnels are forbidden, thereby improving the flexibility of the scheme.
It should be understood that in other embodiments of the multi-CPE redundant link system provided in the embodiments of the present invention, the system may further include three or more CPEs, and accordingly, the data stream is divided into three or more tributaries for transmission, which is not described herein again.
Referring to fig. 7, a transmission method corresponding to the multi-CPE redundant link transmission method in the embodiment of the present invention is described below, where the multi-CPE redundant link transmission method in the embodiment of the present invention includes:
701. CPE1 establishes a first signal tunnel with a routing device via a first wide area network interface;
702. CPE2 establishes a second signal tunnel with the routing device through a second wide area network interface;
703. the two-layer equipment establishes connection with CPE1 and CPE2 through VRRP;
704. CPE1 sets a first priority of CPE1 in the VRRP;
after the two-layer device establishes connection with the CPE1 through the VRRP, the CPE1 sets its priority in the VRRP, and the priority is used for competing for the virtual IP in the VRRP. For ease of differentiation, embodiments of the present invention refer to CPE1 as having priority in the VRRP as a first priority.
705. CPE2 sets a second priority of CPE2 in the VRRP;
after the two-layer device establishes a connection with the CPE2 through the VRRP, the CPE2 sets its priority in the VRRP by itself, and for convenience of differentiation, the priority of the CPE2 in the VRRP is referred to as a second priority, and the first priority is higher than the second priority.
706. The routing equipment sets Metric1 corresponding to the first signal tunnel and Metric2 corresponding to the second signal tunnel;
after the first signal tunnel is established, the routing equipment sets the Metric1 corresponding to the first signal tunnel and the Metric2 corresponding to the second signal tunnel, wherein the Metric1 is greater than the Metric2, that is, the routing equipment sets the path from the target network to the first signal tunnel to be better than the path from the target network to the second signal tunnel. Metric is a Metric for determining the best path to reach the target network and may include, but is not limited to, path length, or bandwidth parameters, or load parameters, or traffic cost, or other parameters.
707. The CPE1 transmits the uplink direction message and the downlink direction message through the first signal tunnel;
since the first priority of the CPE1 in the VRRP is higher than the second priority of the CPE2 in the VRRP, the CPE1 preferentially preempts the virtual IP to become a gateway, and when the two-layer device receives the uplink packet, the uplink packet is forwarded to the CPE1, and the uplink packet is transmitted through the first signal tunnel. Since Metric1 is larger than Metric2, that is, the path from the target network to the first signal tunnel is better than the path from the target network to the second signal tunnel, when the routing device receives the message in the downlink direction, the message in the downlink direction is sent to the CPE1 through the first signal tunnel.
708. The CPE2 transmits the uplink and downlink messages through the second signal tunnel.
When the first signal tunnel is disabled, the two-layer device forwards the received uplink message to the CPE2, and transmits the uplink message through the second signal tunnel, and the routing device forwards the received downlink message to the second signal tunnel, and sends the downlink message to the CPE2 through the second signal tunnel.
It should be understood that, in the embodiment of the present invention, the three steps of establishing the first signal tunnel in step 701, establishing the second signal tunnel in step 702, and establishing the connection between the two-layer device and the CPEs 1 and 2 in step 703 are not performed in sequence. The steps 704, 705, and 705, the CPE1 sets the first priority, the CPE2 sets the second priority, and the routing device sets the Metric1 and the Metric2, are after the steps 701, 702, and 703, but the three steps are not performed in sequence.
In the multi-CPE redundant link transmission method provided by the embodiment of the present invention, a two-layer device is connected to a CPE, a first signal tunnel between the CPE1 and a routing device is correspondingly established, a second signal tunnel between the CPE2 and the routing device is correspondingly set up with a first priority of the CPE1 in a VRRP, a second priority of the CPE2 in the VRRP is lower than the first priority, so that a message in an uplink direction is forwarded to the CPE1 by default, and is forwarded to the CPE2 when a fault occurs; and setting a first route degree Metric1 corresponding to the first signal tunnel and a second route degree Metric2 corresponding to the second signal tunnel, wherein Metric1 is larger than Metric2, so that the message in the downlink direction is forwarded to the first signal tunnel by default, and is forwarded to the second signal tunnel when a fault occurs. According to the scheme, the two-layer equipment can be adopted to establish the multi-CPE redundant link, and compared with the multi-CPE redundant link based on the three-layer equipment, the equipment cost can be saved.
Based on the above-mentioned embodiment corresponding to fig. 7, there are many factors that cause the first signal tunnel to be disabled, and several cases are described below:
first, the first signal tunnel breaks down.
When the routing device detects that the first signal tunnel fails, the routing device disables the first signal tunnel, and the routing device forwards the received message in the downlink direction to the second signal tunnel, and sends the message to the CPE2 through the second signal tunnel. Meanwhile, the CPE1 also detects the failure, and the CPE1 modifies the first priority so that the modified first priority is lower than the second priority, that is, the priority of the CPE1 in the VRRP is lower than the priority of the CPE2, at this time, in the contention of the VRRP, the CPE2 will seize the virtual IP to become a gateway in the contention of the CPE1 and the CPE2, the second layer device will forward the received message in the uplink direction to the CPE2, and the CPE2 transmits the message in the uplink direction through the second signal tunnel.
Further, when the CPE1 detects that the failure of the first signal tunnel is repaired, the CPE1 recovers the first priority, and the recovered first priority is higher than the second priority, at this time, in contention of the VRRP by the CPE1 and the CPE2, the CPE1 seizes the virtual IP to become a gateway, and the two-layer device forwards the received uplink message to the CPE1, and transmits the uplink message through the first signal tunnel. At the same time, the routing device will also detect that the failure is repaired, and the routing device will re-enable the first signal tunnel.
And secondly, the access link of the CPE1 is failed.
When the CPE1 detects that the lan interface of the CPE1 is disconnected, that is, when the connection between the CPE1 and the second layer device is disconnected, the CPE1 disables the connectivity detection of the first signal tunnel, at this time, only the CPE2 is in the VRRP, so that the CPE2 preempts the virtual IP to become a gateway, the second layer device forwards the received uplink message to the CPE2, and the CPE2 transmits the uplink message through the second signal tunnel; when the routing equipment detects that the connectivity detection of the first signal tunnel is disabled, the routing equipment disables the first signal tunnel, and when the routing equipment receives a downlink message, the routing equipment forwards the downlink message to the second signal tunnel and sends the downlink message to the CPE1 through the second signal tunnel.
Further, when the CPE1 detects that the lan interface of the CPE1 is connected, the CPE1 enables connectivity detection of the first signal tunnel, at this time, the CPE1 and the CPE2 compete for the VRRP, the CPE1 preempts the virtual IP to become a gateway, and when the two-layer device forwards the received uplink message to the CPE1, the CPE1 transmits the uplink message through the first signal tunnel; when the routing device detects that connectivity detection of the first signal is enabled, the routing device enables the first signal tunnel, and at this time, the routing device forwards the received downlink direction message to the first signal tunnel, and sends the downlink direction message to the CPE2 through the first signal tunnel.
The embodiment of the invention provides various modes for CPE2 to transmit the message through the second signal tunnel when the first signal tunnel is determined to be forbidden, thereby improving the flexibility of the scheme.
Based on the above embodiment corresponding to fig. 7, in another embodiment of the method for transmitting a multi-CPE redundant link according to the embodiment of the present invention, the method further includes:
1. the CPE3 establishes a third signal tunnel with the routing equipment through a third wide area network interface and establishes connection with the second-layer equipment through the VRRP;
2. CPE3 sets a third priority of CPE3 in the VRRP, the third priority being less than the first priority and the second priority;
3. the routing equipment sets Metric3 corresponding to the third signal tunnel, wherein Metric3 is smaller than Metric 2;
4. when it is determined that both the first signal tunnel and the second signal tunnel are disabled, the CPE3 transmits the uplink message and the downlink message through the third signal tunnel.
Since CPE1 has a higher priority than CPE2 and CPE2 has a higher priority than CPE3, the three CPEs compete for VRRP with CPE1 preempting the virtual IP preferentially and becoming a gateway. Thus CPE1 acts as a primary CPE, CPE2 acts as a primary backup CPE, and CPE3 acts as a secondary backup CPE. After receiving the uplink message, the second-layer device defaults to forward the uplink message to the CPE1, that is, transmits the uplink message through the first signal tunnel; when the first signal tunnel is forbidden, after receiving the uplink message, the second layer device forwards the uplink message to the CPE2, that is, transmits the uplink message through the second signal tunnel; when the first signal tunnel and the second signal tunnel are both disabled, the second layer device receives the uplink message and then forwards the uplink message to the CPE3, and the CPE3 transmits the uplink message through the third signal tunnel.
Since the first degree of routing Metric1 corresponding to the first signal tunnel is greater than the second degree of routing Metric2 corresponding to the second signal tunnel, the second degree of routing Metric2 corresponding to the second signal tunnel is greater than the third degree of routing Metric3 corresponding to the third signal tunnel. Namely, the path from the target network to the first signal tunnel is set to be better than the path from the target network to the second signal tunnel in the routing equipment, and the path from the target network to the second signal tunnel is set to be better than the path from the target network to the third signal tunnel. Therefore, after the routing equipment receives the downlink direction message, the routing equipment defaults to forward the uplink direction message to the first signal tunnel; when the first signal tunnel is forbidden, the routing equipment receives the uplink message and then forwards the uplink message to the second signal tunnel; when the first signal tunnel and the second signal tunnel are both disabled, the routing device forwards the received uplink message to the third signal tunnel, and sends the uplink message to the CPE3 through the third signal tunnel.
The multi-CPE redundant link system in the embodiment of the invention comprises three CPEs, and when two CPEs are unavailable, the system can also transmit through the third CPE, thereby improving the reliability of the scheme.
Referring to fig. 8, another embodiment of the method for transmitting a multi-CPE redundant link in an embodiment of the present invention includes:
801. CPE1 establishes a first signal tunnel with a routing device via a first wide area network interface;
802. CPE2 establishes a second signal tunnel with the routing device via the second wide area network interface;
803. the second-layer equipment establishes a first connection with CPE1 and CPE2 through VRRP1, and establishes a second connection with CPE1 and CPE2 through VRRP 2;
804. CPE1 sets a first priority of CPE1 in VRRP1 and a second priority of CPE1 in VRRP 2;
after the CPE1 establishes the first connection with the layer two device, the CPE1 sets its priority in the VRRP1 by itself, where the priority is used to compete for the virtual IP in the VRRP1, and for convenience of differentiation, the priority of the CPE1 in the VRRP1 is referred to as the first priority in the embodiment of the present invention. After the CPE1 establishes the second connection with the layer two device, the CPE1 sets its priority in the VRRP2 by itself, where the priority is used to compete for the virtual IP in the VRRP2, and for convenience of differentiation, the priority of the CPE1 in the VRRP2 is referred to as the second priority in the embodiment of the present invention.
805. CPE2 sets a third priority of CPE2 in VRRP1 and a fourth priority of CPE2 in VRRP 2;
after the CPE2 establishes the first connection with the layer two device, the CPE2 sets its priority in the VRRP1 by itself, where the priority is used to compete for the virtual IP in the VRRP1, and for convenience of differentiation, the priority of the CPE2 in the VRRP1 is referred to as a third priority in the embodiment of the present invention. After the CPE2 establishes the second connection with the layer two device, the CPE2 sets its priority in the VRRP2 by itself, where the priority is used to compete for the virtual IP in the VRRP2, and for convenience of differentiation, the priority of the CPE2 in the VRRP2 is referred to as a fourth priority in the embodiment of the present invention. Wherein the third priority is lower than the first priority and the fourth priority is higher than the second priority.
806. The routing equipment sets the corresponding Metric1 of the first data flow in the first signal tunnel, the corresponding Metric2 of the first data flow in the second signal tunnel, the corresponding Metric3 of the second data flow in the first signal tunnel, and the corresponding Metric4 of the second data flow in the second signal tunnel;
after the first signal tunnel is established, the routing equipment sets a Metric1 corresponding to the first data flow in the first signal tunnel, a Metric2 corresponding to the first data flow in the second signal tunnel, a Metric3 corresponding to the second data flow in the first signal tunnel, and a Metric4 corresponding to the second data flow in the second signal tunnel, wherein the Metric1 is greater than the Metric2, and the Metric3 is less than the Metric 4. That is, the routing device sets a path of the first data stream from the target network to the first signal tunnel to be superior to a path of the first data stream from the target network to the second signal tunnel, and sets a path of the second data stream from the target network to the second signal tunnel to be superior to a path of the second data stream from the target network to the second signal tunnel.
Metric is a Metric for determining the best path to reach the target network and may include, but is not limited to, path length, or bandwidth parameters, or load parameters, or traffic cost, or other parameters.
807. The CPE1 transmits the first data stream in the uplink direction and the first data stream in the downlink direction through the first signal tunnel;
since the first priority of CPE1 in VRRP1 is higher than the third priority of CPE2 in VRRP1, in VRRP1, CPE1 preemptively assumes that the virtual IP becomes a gateway, and when the first data stream in the upstream direction is received by the layer two device, the first data stream in the upstream direction is forwarded to CPE1, and CPE1 transmits the first data stream in the upstream direction through the first signal tunnel.
Since the path of the first data flow from the target network to the first signal tunnel is superior to the path of the first data flow from the target network to the second signal tunnel, when the routing device receives the first data flow in the downstream direction, the first data flow in the downstream direction is sent to CPE1 through the first signal tunnel.
808. CPE2 transmits the second data stream in the upstream direction and the second data stream in the downstream direction through the second signal tunnel.
Since the fourth priority of CPE2 in VRRP2 is higher than the second priority of CPE1 in VRRP2, in VRRP2, CPE2 preemptively assumes that the virtual IP becomes a gateway, and when the second layer device receives the second data stream in the upstream direction, the second data stream in the upstream direction is forwarded to CPE2, and CPE2 transmits the second data stream in the upstream direction through the second signal tunnel.
Since the path of the second data stream from the target network to the second signal tunnel is superior to the path of the second data stream from the target network to the first signal tunnel, when the routing device receives the second data stream in the downstream direction, the second data stream in the downstream direction is sent to CPE2 through the second signal tunnel.
It should be understood that, in the embodiment of the present invention, the step 801 establishes the first signal tunnel, the step 802 establishes the second signal tunnel, and the step 803 establishes the first connection and the second connection, and the execution sequence of these three steps is not sequential. Step 804CPE1 sets the first priority and the second priority, step 805CPE2 sets the third priority and the fourth priority, and step 806 routes the device to set Metric1, Metric2, Metric3, and Metric4, which are after steps 801 to 803, but the execution order between the three steps is not sequential. The steps 807 and 808 are after the steps 804 to 806, but the execution order of the two steps is not sequential.
Based on the above embodiment corresponding to fig. 8, in another embodiment of the method for transmitting a multi-CPE redundant link according to the embodiment of the present invention, the method further includes:
when it is determined that the second signal tunnel is disabled, CPE1 transmits the second data stream in the upstream direction and the second data stream in the downstream direction through the first signal tunnel;
specifically, when CPE2 detects that the second signal tunnel fails, that is, detects that the second signal tunnel is unavailable, CPE2 modifies the fourth priority such that the modified fourth priority is lower than the second priority, that is, the priority of CPE2 in VRRP2 is lower than the priority of CPE1 in VRRP2, at this time, two CPEs compete in VRRP2, CPE1 robs virtual IP to become a gateway, the second layer device forwards the second data stream in the upstream direction to CPE1, and CPE1 transmits the second data stream in the upstream direction through the first signal tunnel. And when the routing device detects that the second signal tunnel fails, that is, detects that the second signal tunnel is unavailable, the routing device disables the second signal tunnel, and at this time, the routing device forwards the received second data stream in the downstream direction to the first signal tunnel, and sends the second data stream in the downstream direction to the CPE1 through the first signal tunnel.
Further, when the CPE2 is further configured to, when detecting that the failure is recovered, that is, when detecting that the second signal tunnel is available, recover the fourth priority by the CPE2, where the recovered fourth priority is higher than the second priority, at this time, two CPEs compete in the VRRP2, the CPE2 preempts the virtual IP to become a gateway, the second data stream in the upstream direction received by the second layer device is forwarded to the CPE2, and the CPE2 transmits the second data stream in the upstream direction through the second signal tunnel. And when the routing device detects that the failure is recovered, that is, detects that the second signal tunnel is available, the routing device enables the second signal tunnel, forwards the received second data stream in the downstream direction to the second signal tunnel, and sends the second data stream to the CPE2 through the second signal tunnel.
Specifically, when CPE2 detects that the lan interface of CPE2 is disconnected, that is, when detecting that the connection between CPE2 and the layer two device is disconnected, CPE2 disables the connectivity detection of the second signal tunnel, at this time, only CPE1 in VRRP2 is present, so that CPE1 preempts the virtual IP to become a gateway, and the layer two device forwards the received second data stream in the upstream direction to CPE1, and transmits the second data stream in the upstream direction through the first signal tunnel. And when the routing device detects that connectivity detection of the second signal tunnel is disabled, the routing device disables the second signal tunnel, and at this time, the routing device forwards the received second data stream in the downstream direction to the first signal tunnel, and transmits the second data stream to the CPE1 through the first signal tunnel.
Further, when CPE2 detects that the lan interface of CPE2 is connected again, connectivity detection of the second signal tunnel is enabled, and at this time, two CPEs compete in VRRP2, and CPE2 preempts the virtual IP to become a gateway, and the second layer device forwards the received second data stream in the upstream direction to CPE2, and transmits the second data stream in the upstream direction through the second signal tunnel. And when the routing equipment detects that connectivity detection of the second signal tunnel is enabled, the routing equipment enables the second signal tunnel, and at this time, the routing equipment forwards the received second data stream in the downstream direction to the second signal tunnel, and sends the second data stream in the downstream direction to the CPE2 through the second signal tunnel.
The embodiment of the invention provides a specific mode for transmitting the second data stream through the first signal tunnel when various second signal tunnels are forbidden, thereby improving the flexibility of the scheme.
Based on the above embodiment corresponding to fig. 8, in another embodiment of the method for transmitting a multi-CPE redundant link according to the embodiment of the present invention, the method further includes:
CPE2 transmits the first data stream in the downstream direction and the first data stream in the upstream direction through the second signal tunnel when it is determined that the first signal tunnel is disabled.
Specifically, when CPE1 detects that the first signal tunnel fails, that is, detects that the first signal tunnel is unavailable, CPE1 modifies the first priority such that the modified first priority is lower than the third priority, that is, the priority of CPE1 in VRRP1 is lower than the priority of CPE2 in VRRP1, at this time, two CPEs compete in VRRP1, CPE2 preempts virtual IP to become a gateway, the second-layer device forwards the first data stream in the upstream direction to CPE2, and CPE2 transmits the first data stream in the upstream direction through the second signal tunnel. And when the routing device detects that the first signal tunnel fails, that is, detects that the first signal tunnel is unavailable, the routing device disables the first signal tunnel, and at this time, the routing device forwards the received first data stream in the downstream direction to the second signal tunnel, and sends the first data stream sent downstream to the CPE2 through the second signal tunnel.
Further, when the CPE1 detects that the failure is recovered, that is, when it detects that the first signal tunnel is available, the first priority is recovered, and the recovered first priority is higher than the third priority, at this time, when two CPEs compete in the VRRP1, the CPE1 preempts the virtual IP to become a gateway, the second-layer device forwards the received first data stream in the upstream direction to the CPE1, and the CPE1 transmits the first data stream in the upstream direction through the first signal tunnel. When the routing device detects that the failure is recovered, that is, detects that the first signal tunnel is available, the routing device forwards the received first data stream in the downstream direction to the first signal tunnel, and sends the first data stream in the downstream direction to the CPE1 through the first signal tunnel.
Specifically, when CPE1 detects that the lan interface of CPE1 is disconnected, that is, when it detects that the access link of CPE1 is failed, CPE1 disables the connectivity detection of the first signal tunnel, at this time, only CPE2 is present in VRRP1, so that CPE2 preempts the virtual IP to become a gateway, and the layer two device forwards the received first data stream in the upstream direction to CPE2, and transmits the first data stream in the upstream direction through the second signal tunnel. And when the routing device detects that the connectivity detection of the first signal tunnel is disabled, the routing device disables the first signal tunnel, and at this time, the routing device forwards the received first data stream in the downstream direction to the second signal tunnel, and sends the first data stream in the downstream direction to the CPE2 through the second signal tunnel.
Further, when CPE1 detects that the lan interface of CPE1 is connected again, connectivity detection of the first signal tunnel is enabled, and at this time, in contention of VRRP1 between two CPEs, CPE1 preempts virtual IP to become a gateway, and the second layer device forwards the received first data stream in the upstream direction to CPE1, and transmits the first data stream in the upstream direction through the first signal tunnel. And when the routing equipment detects that the connectivity detection of the first signal tunnel is enabled, the routing equipment enables the first signal tunnel, and at this time, the routing equipment forwards the received first data stream in the downstream direction to the first signal tunnel, and sends the first data stream to the CPE1 through the first signal tunnel.
The embodiment of the invention provides a specific mode for transmitting the first data stream through the second signal tunnel when various first signal tunnels are forbidden, thereby improving the flexibility of the scheme.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (4)

1. A multi-CPE redundant link system, the system comprising: two layers of equipment, a first customer premises equipment CPE1, a second customer premises equipment CPE2 and routing equipment;
the two-layer equipment is connected with the local area network interfaces of the CPE1 and the CPE2 through a first virtual routing redundancy protocol (VRRP 1), and the VRRP1 corresponds to a first data stream;
the two-layer equipment is connected with local area network interfaces of the CPE1 and the CPE2 through a second virtual routing redundancy protocol (VRRP 2), and the VRRP2 corresponds to a second data stream;
the CPE1 is connected with the routing equipment through a first wide area network interface to form a first signal tunnel;
the CPE2 is connected with the routing equipment through a second wide area network interface to form a second signal tunnel;
the CPE1 is used to set a first priority of the CPE1 in the VRRP1 and a second priority of the CPE1 in the VRRP 2;
the CPE2 is used to set a third priority of the CPE2 in the VRRP1 and a fourth priority of the CPE2 in the VRRP2, the third priority being lower than the first priority and the fourth priority being higher than the second priority;
the routing equipment is used for setting a corresponding first degree of routing Metric1 of a first data flow in the first signal tunnel, a corresponding second degree of routing Metric2 of the first data flow in the second signal tunnel, a corresponding third degree of routing Metric3 of a second data flow in the first signal tunnel and a corresponding fourth degree of routing Metric4 of the second data flow in the second signal tunnel, wherein Metric1 is larger than Metric2, and Metric3 is smaller than Metric 4;
the first signal tunnel is used for transmitting a first data stream in an uplink direction and a first data stream in a downlink direction;
the second signal tunnel is used for transmitting a second data stream in an uplink direction and a second data stream in a downlink direction.
2. The system of claim 1,
the first signal tunnel is further used for transmitting a second data stream in an uplink direction and a second data stream in a downlink direction when the second signal tunnel is disabled;
the second signal tunnel is further configured to transmit a first data flow in a downlink direction and a first data flow in an uplink direction when the first signal tunnel is disabled.
3. A multi-CPE redundant link transmission method is characterized by comprising the following steps:
CPE1 establishes a first signal tunnel with a routing device via a first wide area network interface;
CPE2 establishes a second signal tunnel with the routing device via the second wide area network interface;
the second-layer equipment establishes a first connection with CPE1 and CPE2 through VRRP1, and establishes a second connection with CPE1 and CPE2 through VRRP 2;
the CPE1 sets a first priority of the CPE1 in the VRRP1 and a second priority of the CPE1 in the VRRP 2;
the CPE2 sets a third priority of the CPE2 in the VRRP1 and a fourth priority of the CPE2 in the VRRP2, the third priority being lower than the first priority and the fourth priority being higher than the second priority;
the routing equipment sets a corresponding first degree of routing Metric1 of a first data stream in the first signal tunnel, a corresponding second degree of routing Metric2 of the first data stream in the second signal tunnel, a corresponding third degree of routing Metric3 of a second data stream in the first signal tunnel, and a corresponding fourth degree of routing Metric4 of the second data stream in the second signal tunnel, wherein Metric1 is greater than Metric2, and Metric3 is less than Metric 4;
the CPE1 transmits the first data stream in the uplink direction and the first data stream in the downlink direction through the first signal tunnel;
the CPE2 transmits the second data stream in the uplink direction and the second data stream in the downlink direction through the second signal tunnel.
4. The method of claim 3, further comprising:
when it is determined that the second signal tunnel is disabled, the CPE1 transmits the second data stream in the upstream direction and the second data stream in the downstream direction through the first signal tunnel;
when it is determined that the first signal tunnel is disabled, the CPE2 transmits the first data flow in the downstream direction and the first data flow in the upstream direction through the second signal tunnel.
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