CN107800581B - Two-layer network and loopback detection method thereof - Google Patents

Two-layer network and loopback detection method thereof Download PDF

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CN107800581B
CN107800581B CN201610801076.3A CN201610801076A CN107800581B CN 107800581 B CN107800581 B CN 107800581B CN 201610801076 A CN201610801076 A CN 201610801076A CN 107800581 B CN107800581 B CN 107800581B
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mip
bier
forwarding table
loopback detection
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CN107800581A (en
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肖敏
张征
王翠
魏月华
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
    • 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
    • H04L45/66—Layer 2 routing, e.g. in Ethernet based MAN's

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Abstract

The embodiment of the invention provides a two-layer network and a loopback detection method of the two-layer network, wherein the method comprises the following steps: after any network node in the two-layer network is configured with MIP for detecting a BIER forwarding table or an MAC forwarding table, an MIP address for detecting the BIER forwarding table or the MAC forwarding table is sent to the other network nodes; after starting the loopback detection function from the MEP to the target MIP, the MEP sends a loopback detection message carrying the target MIP address; after any network node in the two-layer network receives the loopback detection message, when the network node is not configured with MIP or the configured MIP address is inconsistent with the target MIP address, forwarding based on a BIER forwarding table or forwarding based on an MAC forwarding table is carried out on the loopback detection message according to the target MIP address.

Description

Two-layer network and loopback detection method thereof
Technical Field
The invention relates to the technical field of communication, in particular to a two-layer network and a loopback detection method of the two-layer network, which are suitable for applying Bit Indexed Explicit Replication (BIER) to a scene of the two-layer network, wherein the two-layer network is a data link layer network.
Background
In the current ethernet, the Institute of Electrical and Electronics Engineers (IEEE) has established a set of Operation, Administration and Maintenance (OAM) mechanisms for ethernet, and has been promulgated as the 802.1ag standard in 2007.
The IEEE 802.1ag standard defines an OAM functional logic entity in an ethernet, which includes Maintenance End Points (MEP) located at both ends of an ethernet transmission path and a Maintenance Intermediate Point (MIP) located in the middle of the ethernet transmission path; the Maintenance end Point and the Maintenance intermediate Point are collectively called as Maintenance Point (MP for short); the maintenance points in the Ethernet are all established based on the ports of the network nodes, and the MAC (Media Access Control) address of the port is the MAC address of the maintenance point established based on the port; loopback detection is one of ethernet OAM functions defined by IEEE 802.1ag standard, which functions from MEP to MEP or MEP to MIP in order to detect failure of the whole or a section of the ethernet transmission path, wherein the failure of the ethernet transmission path includes both failure of the link between network nodes and forwarding failure of the network nodes.
The IEEE 802.1ag standard provides a loopback detection mechanism based on MAC forwarding, fig. 1 is a schematic diagram of the loopback detection mechanism based on MAC forwarding in the prior art, as shown in fig. 1, switch 1 and switch 4 each create 1 MEP and 1 MIP, and switch 2 and switch 3 each create two MIPs, where the MEP created by switch 1 is MEP1, the MIP created by switch 1 is MIP1, the MEP created by switch 4 is MEP2, and the MIP created by switch 4 is MIP 6; the two MIPs created by switch 2 are MIP2 and MIP3, respectively, and the two MIPs created by switch 3 are denoted MIP4 and MIP5, respectively; on the basis of fig. 1, an exemplary loopback detection process includes the following steps:
step 1, after a network operator inputs an address of MIP5 and starts a loopback detection function from MEP1 to MIP5, MEP1 sends a loopback detection message with the address of MIP5 as a destination MAC address to MIP5, and the message reaches MIP5 along a loopback detection message transmission path (i.e. a transmission path forwarded based on MAC).
Step 2, after receiving the loopback detection message and detecting it without errors, the MIP5 replies a loopback response message to the MEP1 sending the message along the loopback response message transmission path.
And step 3, after receiving the loopback response message replied by the MIP5 and detecting the loopback response message without errors, the MEP1 returns a report of successful loopback detection to the network operator.
U.S. patent application US2015078380(Bit expressed application Replication For Layer 2Networking) discloses a method For realizing a BIER two-Layer network, which comprises the following steps: a BIER Tag (BIER Tag) and a Bit Mask (Bit Mask) in the header of the ethernet frame are defined. Firstly, the network edge node will encapsulate the BIER label and the bit mask in the frame header of the ethernet frame entering the network, and then the network node will forward the multicast ethernet frame based on the BIER label carrying the bit mask. Specifically, two mutually independent forwarding tables, namely an MAC forwarding table and a BIER forwarding table, are stored on the network node and are respectively used for forwarding the unicast ethernet frame and the multicast ethernet frame, wherein the MAC forwarding table is used for forwarding the unicast ethernet frame, and the BIER forwarding table is used for forwarding the multicast ethernet frame. For ethernet frames that need to be forwarded, the network node extracts the destination MAC address and BIER label of the ethernet frame. When the destination MAC address of the Ethernet frame is a unicast MAC address, ignoring the BIER label, searching an MAC forwarding table according to the destination MAC address and forwarding a message according to a forwarding mechanism of the MAC; and when the destination MAC address of the Ethernet frame is the multicast MAC address, ignoring the destination MAC address, searching a BIER forwarding table according to the BIER label and forwarding the message according to a forwarding mechanism of the BIER.
When the loopback detection function is applied to a BIER two-layer network, loopback detection of a BIER forwarding table on a transmission path to be detected cannot be realized for an application scene of loopback detection from MEP to MIP.
Disclosure of Invention
In order to solve the existing technical problem, embodiments of the present invention provide a two-layer network and a loopback detection method for the two-layer network, which are used for solving the problem that loopback detection for a BIER forwarding table on a transmission path to be detected cannot be realized in an application scenario in which loopback detection is performed from an MEP to an MIP.
In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:
the embodiment of the invention provides a loopback detection method of a two-layer network, which comprises the following steps:
after any network node in the two-layer network is configured with MIP for detecting a BIER forwarding table or MIP for detecting an MAC forwarding table, sending MIP addresses for detecting the BIER forwarding table or MIP addresses for detecting the MAC forwarding table to all the other network nodes in the two-layer network;
after starting the loopback detection function from the MEP to the target MIP, the MEP sends a loopback detection message carrying the target MIP address;
after any network node in the two-layer network receives the loopback detection message, when the network node is not configured with MIP or the configured MIP address is inconsistent with the target MIP address, forwarding based on a BIER forwarding table or forwarding based on an MAC forwarding table is carried out on the loopback detection message according to the target MIP address.
In the above scheme, the method further comprises: after any network node in the two-layer network receives the loopback detection message, when the address of the MIP configured by the network node is consistent with the target MIP address, the loopback detection message is terminated.
In the above scheme, the method further comprises:
when any network node in the two-layer network receives a MIP address for detecting a BIER forwarding table, the received MIP address is added to an address filtering table, and the received MIP address is configured to be a MIP address forwarded based on the BIER forwarding table; when any network node in the two-layer network receives an MIP address for detecting the MAC forwarding table, the received MIP address is added to an address filtering table, and the received MIP address is configured to be the MIP address forwarded based on the MAC forwarding table;
correspondingly, the forwarding based on the BIER forwarding table or the forwarding based on the MAC forwarding table of the loopback detection packet according to the target MIP address includes:
the network node selects the loopback detection message to carry out forwarding based on a BIER forwarding table or forwarding based on an MAC forwarding table by comparing the target MIP address with the MIP address in the address filtering table.
In the above scheme, the method further comprises: and simultaneously configuring the MIPs positioned on the same loopback detection message transmission path into MIPs for detecting the BIER forwarding table or MIPs for detecting the MAC forwarding table.
In the above scheme, the address of the target MIP is a unicast MAC address of the port where the target MIP is located.
The embodiment of the invention also provides a two-layer network, wherein any network node in the two-layer network is used for sending MIP addresses for detecting the BIER forwarding table or MIP addresses for detecting the MAC forwarding table to all the other network nodes in the two-layer network after the MIP for detecting the BIER forwarding table or the MIP for detecting the MAC forwarding table is configured;
the MEP in the two-layer network is used for sending a loopback detection message carrying a target MIP address after starting a loopback detection function from the MEP to the target MIP;
and any network node in the two-layer network is used for forwarding the loopback detection message based on the BIER forwarding table or based on the MAC forwarding table according to the target MIP address when the MIP is not configured at the network node or the configured MIP address is inconsistent with the target MIP address after the loopback detection message is received.
In the above-mentioned solution, any network node in the two-layer network is further configured to terminate the loopback detection packet after receiving the loopback detection packet and when an address of the MIP configured by the network node is consistent with the target MIP address.
In the above solution, any network node in the two-layer network is further configured to, when receiving a MIP address used for detecting a BIER forwarding table, add the received MIP address to an address filtering table, and configure the received MIP address as a MIP address forwarded based on the BIER forwarding table; when receiving a MIP address for detecting the MAC forwarding table, adding the received MIP address to an address filtering table, and configuring the received MIP address as a MIP address forwarded based on the MAC forwarding table;
correspondingly, any network node in the two-layer network is specifically configured to select forwarding based on the BIER forwarding table or forwarding based on the MAC forwarding table for the loopback detection packet by comparing the target MIP address with the MIP address in the address filtering table of the network node.
In the above solution, the MIPs located on the same loopback detection packet transmission path are simultaneously configured as MIPs for detecting BIER forwarding tables or MIPs for detecting MAC forwarding tables.
In the above scheme, the address of the target MIP is a unicast MAC address of the port where the target MIP is located.
In the loopback detection method of the two-layer network and the two-layer network provided by the embodiment of the invention, after any network node in the two-layer network is configured with a maintenance intermediate point MIP for explicitly copying a BIER forwarding table by a detection bit index or an MIP for detecting a media access control MAC forwarding table, an MIP address for detecting the BIER forwarding table or an MIP address for detecting the MAC forwarding table is sent to all other network nodes in the two-layer network; after starting the loopback detection function from the maintenance end point MEP to the target MIP, the MEP sends a loopback detection message carrying the target MIP address; after any network node in the two-layer network receives the loopback detection message, when the network node is not configured with MIP or the configured MIP address is inconsistent with the target MIP address, forwarding the loopback detection message based on a BIER forwarding table or forwarding based on an MAC forwarding table is carried out according to the target MIP address; therefore, for the application scene of loopback detection from MEP to MIP, loopback detection aiming at the MAC forwarding table on the transmission path to be detected can be realized, and loopback detection aiming at the BIER forwarding table on the transmission path to be detected can also be realized.
Drawings
Fig. 1 is a schematic diagram of a loopback detection mechanism based on MAC forwarding in the prior art;
fig. 2 is a schematic flow chart of a loopback detection method of a two-layer network according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an implementation of loopback detection in a BIER two-layer network according to a first embodiment of the present invention;
fig. 4 is a schematic diagram of an implementation of loopback detection in a BIER two-layer network according to a second embodiment of the present invention;
fig. 5 is a schematic diagram of an implementation of loopback detection in a BIER two-layer network according to a third embodiment of the present invention;
fig. 6 is a schematic diagram of an implementation of loopback detection in a BIER two-layer network according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
An embodiment of the present invention describes a loopback detection method for a two-layer network, and fig. 2 is a schematic flow chart of the loopback detection method for the two-layer network according to the embodiment of the present invention, as shown in fig. 2, the flow chart includes:
step 201: after any network node in the two-layer network is configured with the MIP for detecting the BIER forwarding table or the MIP for detecting the MAC forwarding table, the MIP address for detecting the BIER forwarding table or the MIP address for detecting the MAC forwarding table is sent to all the other network nodes in the two-layer network.
That is, if any network node in the two-layer network configures MIP for detecting the BIER forwarding table, the MIP address for detecting the BIER forwarding table is notified to all the other network nodes in the two-layer network; if any network node in the two-layer network configures MIP for detecting the MAC forwarding table, the MIP address for detecting the MAC forwarding table is announced to all the other network nodes in the two-layer network.
It should be noted that one MIP cannot be configured to be the MIP for detecting the BIER forwarding table and the MIP for detecting the MAC forwarding table at the same time, and MIPs located on the same loopback detection packet transmission path can be configured to be the MIP for detecting the BIER forwarding table or the MIP for detecting the MAC forwarding table at the same time.
Further, when any network node in the two-layer network receives a MIP address for detecting the BIER forwarding table, adding the received MIP address to the address filtering table, and configuring the received MIP address as a MIP address forwarded based on the BIER forwarding table; when any network node in the two-layer network receives the MIP address for detecting the MAC forwarding table, the received MIP address is added to the address filtering table, and the received MIP address is configured to be the MIP address forwarded based on the MAC forwarding table.
The address filtering table is used for selecting BIER forwarding or MAC forwarding for a specific message destination MAC address, and specifically, classifying a message carrying the specific message destination MAC address into a BIER forwarding table for forwarding based on a BIER label in the message or an MAC forwarding table for forwarding based on the message destination MAC address; in the prior art, the message carrying the destination MAC address of the unicast message is assigned to the MAC forwarding table, and the message carrying the destination MAC address of the multicast message is assigned to the BIER forwarding table.
If the network node receives the MIP address which is used for detecting the BIER forwarding table and is advertised by other network nodes, the MIP address is added to an address filtering table, and the MIP address is configured to be the MIP address forwarded based on the BIER forwarding table; if the network node receives the MIP address which is advertised by other network nodes and used for detecting the MAC forwarding table, the MIP address is added to the address filtering table, and the MIP address is configured to be the MIP address which is forwarded based on the MAC forwarding table.
Step 202: after the loopback detection function from the maintenance end point MEP to the target MIP is started, the MEP sends a loopback detection message carrying the target MIP address.
In an implementation manner of this step, a network operator inputs an address of a target MIP, and after starting a loopback detection function from an MEP to the target MIP, the MEP sends a loopback detection message with a target MAC address being the target MIP address input by the network operator.
Here, the MEP and the target MIP in this step are both maintenance points configured in the network by the network operator, the maintenance points are configured based on the ports, the MEP address is the MAC address of the port where the MEP is located, the address of the target MIP is the MAC address of the port where the MIP is located, and the MAC addresses of all the ports in the network are unicast addresses. In this step, the address of the target MIP input by the network operator is the unicast MAC address of the port where the MIP is located; that is, the address of the target MIP is the unicast MAC address of the port where the target MIP is located.
In the ethernet network supporting BIER, there are two ways for forwarding the loopback detection message sent by MEP to MIP, one is forwarding based on BIER, and the other is forwarding based on MAC.
Step 203: after any network node in the two-layer network receives the loopback detection message, when the network node is not configured with MIP or the configured MIP address is inconsistent with the target MIP address, forwarding based on a BIER forwarding table or forwarding based on an MAC forwarding table is carried out on the loopback detection message according to the target MIP address.
In an implementation manner of this step, when the network node does not configure the MIP, or the configured MIP address is inconsistent with the target MIP address, the network node selects the loopback detection packet to perform forwarding based on the BIER forwarding table or forwarding based on the MAC forwarding table by comparing the target MIP address with the MIP address in the address filtering table.
Further, after receiving the loopback detection message, any network node in the two-layer network terminates the loopback detection message when the address of the MIP configured by the network node is consistent with the target MIP address.
That is, after receiving the loopback detection message, any network node in the two-layer network selects BIER forwarding or MAC forwarding according to the address filtering table until the network node with the configured MIP address consistent with the destination address of the loopback detection message terminates the message.
If the network node is not configured with MIP, after receiving a loopback detection message sent by MEP, searching an address filtering table based on a destination MAC address of the message, and selecting a BIER forwarding table or an MAC forwarding table for forwarding according to the address filtering table.
If the network node is configured with MIP, after receiving the loopback detection message sent by MEP, the target MAC address of the loopback detection message is compared with the address of MIP configured on the network node. If the two addresses are consistent, terminating the message and performing further loopback detection message processing; if the two addresses are not consistent, the message is not terminated, but an address filtering table is searched based on the destination MAC address of the message, and a BIER forwarding table or an MAC forwarding table is selected according to the address filtering table for forwarding.
By applying the loopback detection method of the two-layer network in the embodiment of the invention, for the application scene of loopback detection from MEP to MIP, the loopback detection of the MAC forwarding table on the transmission path to be detected can be realized, and the loopback detection of the BIER forwarding table on the transmission path to be detected can also be realized.
Example one
Fig. 3 is a schematic diagram of an implementation of loop-back detection in a BIER two-tier network according to a first embodiment of the present invention, where as shown in fig. 3, the BIER two-tier network includes 16 BIER switches, and the 16 BIER switches are BIER switch 1, BIER switch 2, BIER switch 3, BIER switch 4, BIER switch 5, BIER switch 6, BIER switch 7, BIER switch 8, BIER switch 9, BIER switch 10, BIER switch 11, BIER switch 12, BIER switch 13, BIER switch 14, BIER switch 15, and BIER switch 16; the 16 BIER switches are switches supporting BIER forwarding and MAC forwarding, and a transmission path from BIER switch 1 to BIER switch 15 after passing through BIER switch 2, BIER switch 4, BIER switch 7 and BIER switch 11 and based on BIER forwarding is a transmission path to be detected.
A network operator configures two MEPs on a transmission path to be detected, wherein MEP1 is configured on port 1 of BIER switch 1, and MEP2 is configured on port 1 of BIER switch 15; in addition, the network operator configures MIP1 on port 1 of BIER switch 7 for detecting BIER forwarding tables.
In one implementation, BIER forwarding based loop-back detection from MEP1 to MIP1 mainly includes the following steps:
step 11: after the network operator configures MIP1 on port 1 of BIER switch 7 for detecting BIER forwarding tables, BIER switch 7 advertises the address of MIP1 and an indication of MIP1 for detecting BIER forwarding tables to all other network nodes of the BIER two-layer network.
Illustratively, the address of MIP1 IS the MAC address 00-11-22-00-00-71 of port 1 of BIER switch 7, and BIER switch 7 may notify the address of MIP1 and the indication that MIP1 IS used to detect BIER forwarding table to other BIER switches in the network through an Open Shortest Path First (OSPF) protocol, or an Intermediate System to Intermediate System (IS-IS) protocol, or other notification protocols, where the address of MIP1 occupies six bytes and the indication that MIP1 IS used to detect BIER forwarding table occupies one bit.
Step 12: after receiving the MIP1 address advertised by the BIER switch 7 and the indication that MIP1 is used for detecting the BIER forwarding table, other BIER switches except the BIER switch 7 in the BIER two-layer network add the MIP1 address to the address filtering table, so that the MIP1 address corresponds to the BIER forwarding table.
Step 13: after a network operator starts a loopback detection function from MEP1 to MIP1, MEP1 sends a loopback detection message with a destination MAC address of MIP1 address 00-11-22-00-00-71.
The loopback detection message sent by MEP1 carries a BIER label and a bit mask for BIER forwarding, wherein the value of the bit mask should instruct the BIER switch to forward the loopback detection message along the transmission path to be detected.
Step 14: after receiving the loopback detection message, each BIER switch selects a BIER forwarding table according to the address filtering table to forward the message until the BIER switch 7 terminates the message according to the destination MAC address of the loopback detection message.
Specifically, after receiving the loopback detection message sent by MEP1, BIER switch 2 searches an address filtering table based on destination MAC address 00-11-22-00-00-71 of the message, and selects BIER forwarding according to the address filtering table, so BIER switch 2 performs BIER forwarding on the message based on a BIER label and a bit mask carried by the message, and sends the message to its next-hop BIER switch 4.
After receiving the loopback detection message forwarded by the BIER switch 2, the BIER switch 4 searches an address filtering table based on the destination MAC address 00-11-22-00-00-71 of the message, selects BIER forwarding according to the address filtering table, and then the BIER switch 4 performs BIER forwarding on the message based on the BIER label and the bit mask carried by the message and sends the message to the next-hop BIER switch 7.
Since the BIER switch 7 is configured with MIP, after receiving the loopback detection message forwarded by the BIER switch 4, the BIER switch 7 compares the destination MAC address 00-11-22-00-00-71 of the message with the address of MIP1 configured on the BIER switch 7, and as a result of the comparison, the destination MAC address of the message is consistent with the address of MIP1, so that the BIER switch 7 does not forward the loopback detection message any more, and the loopback detection message is terminated by MIP1 and further processed.
Example two
Fig. 4 is a schematic diagram of an implementation of loop-back detection in a BIER two-tier network according to a second embodiment of the present invention, where the BIER two-tier network includes 16 BIER switches, and the 16 BIER switches are BIER switch 1, BIER switch 2, BIER switch 3, BIER switch 4, BIER switch 5, BIER switch 6, BIER switch 7, BIER switch 8, BIER switch 9, BIER switch 10, BIER switch 11, BIER switch 12, BIER switch 13, BIER switch 14, BIER switch 15, and BIER switch 16, respectively; the 16 BIER switches are switches supporting BIER forwarding and MAC forwarding, and a transmission path from BIER switch 1 to BIER switch 15 after passing through BIER switch 2, BIER switch 4, BIER switch 7 and BIER switch 11 and based on BIER forwarding is a transmission path to be detected.
A network operator configures two MEPs on a transmission path to be detected, wherein MEP1 is configured on port 1 of BIER switch 1, and MEP2 is configured on port 1 of BIER switch 15; in addition, the network operator configures MIP1 for detecting BIER forwarding tables on port 1 of BIER switch 4, and configures MIP2 for detecting BIER forwarding tables on port 1 of BIER switch 7.
In one implementation, BIER forwarding based loop-back detection from MEP1 to MIP2 mainly includes the following steps:
step 21: after the network operator configures MIP2 for detecting the BIER forwarding table on port 1 of BIER switch 7, BIER switch 7 advertises the address of MIP2 and an indication that MIP2 is used for detecting the BIER forwarding table to all other network nodes of the BIER two-layer network; likewise, BIER switch 4 will also advertise to all other network nodes of the BIER two-layer network the address of MIP1 and an indication that MIP1 is used to detect BIER forwarding tables.
Here, the address of MIP2 IS the MAC address 00-11-22-00-00-71 of port 1 of BIER switch 7, BIER switch 7 may advertise the address of MIP2 and the indication that MIP2 IS used to detect BIER forwarding table to other BIER switches in the network through OSPF protocol, or IS-IS protocol, or other advertising protocol, where the address of MIP2 occupies six bytes, and the indication that MIP2 IS used to detect BIER forwarding table occupies one bit. BIER switch 4 also advertises the address of MIP1 and the indication of MIP1 to detect BIER forwarding tables outward in the same way.
Step 22: after receiving the MIP2 address advertised by the BIER switch 7 and the indication that MIP2 is used for detecting the BIER forwarding table, other BIER switches except the BIER switch 7 in the BIER two-layer network add the MIP2 address to the address filtering table, so that the MIP2 address corresponds to the BIER forwarding table. Similarly, after receiving the MIP1 address advertised by BIER switch 4 and an indication that MIP1 was used to detect BIER forwarding tables, BIER switches other than BIER switch 4 in the BIER two-tier network add the MIP1 address to the address filtering table so that MIP1 address corresponds to BIER forwarding tables.
Step 23: after a network operator starts a loopback detection function from MEP1 to MIP2, MEP1 sends a loopback detection message with a destination MAC address of MIP2 address 00-11-22-00-00-71.
The loopback detection message sent by MEP1 carries a BIER label and a bit mask for BIER forwarding, wherein the value of the bit mask should instruct the BIER switch to forward the loopback detection message along the transmission path to be detected.
Step 24: after receiving the loopback detection message, each BIER switch selects a BIER forwarding table according to the address filtering table to forward the message until the BIER switch 7 terminates the message according to the destination MAC address of the loopback detection message.
Specifically, after receiving the loopback detection message sent by MEP1, BIER switch 2 searches an address filtering table based on destination MAC address 00-11-22-00-00-71 of the message, and selects BIER forwarding according to the address filtering table, so BIER switch 2 performs BIER forwarding on the message based on a BIER label and a bit mask carried by the message, and sends the message to its next-hop BIER switch 4.
Since BIER switch 4 is configured with MIP, after receiving the loopback detection message forwarded by BIER switch 2, BIER switch 4 compares destination MAC address 00-11-22-00-00-71 of the message with the address of MIP1 configured on BIER switch 4, and as a result of the comparison, the destination MAC address of the message is not consistent with the address of MIP1, BIER switch 4 continues to forward the loopback detection message, i.e., looks up an address filtering table based on destination MAC address 00-11-22-00-71 of the message, selects BIER forwarding according to the address filtering table, and accordingly BIER switch 4 forwards the message BIER based on the BIER label and bit mask carried by the message to the next hop BIER switch 7.
Since the BIER switch 7 is configured with MIP, after receiving the loopback detection message forwarded by the BIER switch 4, the BIER switch 7 compares the destination MAC address 00-11-22-00-00-71 of the message with the address of MIP1 configured on the BIER switch 7, and as a result of the comparison, the destination MAC address of the message is consistent with the address of MIP1, so that the BIER switch 7 does not forward the loopback detection message any more, and the loopback detection message is terminated by MIP1 and further processed.
EXAMPLE III
Fig. 5 is a schematic diagram of an implementation of loop-back detection in a BIER two-tier network according to a third embodiment of the present invention, where as shown in fig. 5, the BIER two-tier network includes 16 BIER switches, and the 16 BIER switches are BIER switch 1, BIER switch 2, BIER switch 3, BIER switch 4, BIER switch 5, BIER switch 6, BIER switch 7, BIER switch 8, BIER switch 9, BIER switch 10, BIER switch 11, BIER switch 12, BIER switch 13, BIER switch 14, BIER switch 15, and BIER switch 16; the 16 BIER switches are switches supporting BIER forwarding and MAC forwarding, and a transmission path from BIER switch 1 to BIER switch 15 after passing through BIER switch 2, BIER switch 4, BIER switch 7 and BIER switch 11 and based on BIER forwarding is a transmission path to be detected.
A network operator configures two MEPs on a transmission path to be detected, wherein MEP1 is configured on port 1 of BIER switch 1, and MEP2 is configured on port 1 of BIER switch 15; in addition, the network operator configures MIP1 on port 1 of BIER switch 7 for detecting the MAC forwarding table.
In one implementation, the MAC forwarding based loopback detection from MEP1 to MIP1 mainly comprises the following steps:
step 31: after the network operator configures MIP1 for detecting the MAC forwarding table on port 1 of BIER switch 7, BIER switch 7 advertises the address of MIP1 and an indication of MIP1 for detecting the MAC forwarding table to all other network nodes.
Illustratively, the address of MIP1 IS the MAC address 00-11-22-00-00-71 of port 1 of BIER switch 7, BIER switch 7 may advertise the address of MIP1 and the indication that MIP1 IS used to detect the MAC forwarding table to other BIER switches in the BIER two-layer network via the OSPF protocol, or IS-IS protocol, or other advertising protocol, where the address of MIP1 occupies six bytes and the indication that MIP1 IS used to detect the MAC forwarding table occupies one bit.
Step 32: after receiving the MIP1 address advertised by the BIER switch 7 and the indication that the MIP1 is used for detecting the MAC forwarding table, other BIER switches except the BIER switch 7 in the BIER two-layer network add the MIP1 address to the address filtering table, so that the MIP1 address corresponds to the MAC forwarding table.
Step 33: after a network operator starts a loopback detection function from MEP1 to MIP1, MEP1 sends a loopback detection message with a destination MAC address of MIP1 address 00-11-22-00-00-71.
Step 34: after receiving the loopback detection message, each BIER switch selects an MAC forwarding table according to the address filtering table to forward the message until the BIER switch 7 terminates the message according to the target MAC address of the loopback detection message.
Specifically, after receiving the loopback detection message sent by MEP1, BIER switch 2 searches the address filtering table based on the destination MAC address 00-11-22-00-00-71 of the message, and selects MAC forwarding according to the address filtering table, so that BIER switch 2 performs MAC forwarding on the message based on the destination MAC address of the message, and sends the message to its next hop BIER switch 4.
After receiving the loopback detection message forwarded by the BIER switch 2, the BIER switch 4 searches an address filtering table based on the destination MAC address 00-11-22-00-00-71 of the message, and selects MAC forwarding according to the address filtering table, so that the BIER switch 4 performs MAC forwarding on the message based on the destination MAC address of the message and sends the message to the BIER switch 7 of the next hop.
Since the BIER switch 7 is configured with MIP, after receiving the loopback detection message forwarded by the BIER switch 4, the BIER switch 7 compares the destination MAC address 00-11-22-00-00-71 of the message with the address of MIP1 configured on the BIER switch 7, and as a result of the comparison, the destination MAC address of the message is consistent with the address of MIP1, so that the BIER switch 7 does not forward the loopback detection message any more, and the loopback detection message is terminated by MIP1 and further processed.
Example four
Fig. 6 is a schematic diagram of an implementation of loop-back detection in a BIER two-tier network according to a fourth embodiment of the present invention, where as shown in fig. 6, the BIER two-tier network includes 16 BIER switches, and the 16 BIER switches are BIER switch 1, BIER switch 2, BIER switch 3, BIER switch 4, BIER switch 5, BIER switch 6, BIER switch 7, BIER switch 8, BIER switch 9, BIER switch 10, BIER switch 11, BIER switch 12, BIER switch 13, BIER switch 14, BIER switch 15, and BIER switch 16; the 16 BIER switches are switches supporting BIER forwarding and MAC forwarding, and a transmission path from BIER switch 1 to BIER switch 15 after passing through BIER switch 2, BIER switch 4, BIER switch 7 and BIER switch 11 and based on BIER forwarding is a transmission path to be detected.
A network operator configures two MEPs on a transmission path to be detected, wherein MEP1 is configured on port 1 of BIER switch 1, and MEP2 is configured on port 1 of BIER switch 15; in addition, the network operator configures MIP1 for detecting MAC forwarding tables on port 1 of BIER switch 4, and configures MIP2 for detecting MAC forwarding tables on port 1 of BIER switch 7.
In one implementation, the MAC forwarding based loopback detection from MEP1 to MIP2 mainly comprises the following steps:
step 41: after the network operator configures MIP2 for detecting the MAC forwarding table on port 1 of BIER switch 7, BIER switch 7 advertises the address of MIP2 and an indication that MIP2 is used for detecting the MAC forwarding table to all other network nodes of the BIER two-layer network; likewise, BIER switch 4 will also advertise to all other network nodes of the BIER two-layer network the address of MIP1 and an indication that MIP1 is used to detect the MAC forwarding table.
Here, the address of MIP2 IS the MAC address 00-11-22-00-00-71 of port 1 of BIER switch 7, BIER switch 7 may notify other BIER switches in the network of the address of MIP2 and the indication of MIP2 for detecting the MAC forwarding table through the OSPF protocol, or IS-IS protocol, or other notification protocols, where the address of MIP2 occupies six bytes and the indication of MIP2 for detecting the BIER forwarding table occupies one bit. BIER switch 4 also advertises the address of MIP1 and the indication of MIP1 to detect the MAC forwarding table outward in the same way.
Step 42: after receiving the MIP2 address advertised by the BIER switch 7 and the indication that the MIP2 is used for detecting the MAC forwarding table, other BIER switches except the BIER switch 7 in the BIER two-layer network add the MIP2 address to the address filtering table, so that the MIP2 address corresponds to the MAC forwarding table. Similarly, after receiving the MIP1 address advertised by BIER switch 4 and an indication that MIP1 is used to detect a MAC forwarding table, BIER switches other than BIER switch 4 in the BIER two-layer network add the MIP1 address to the address filtering table so that the MIP1 address corresponds to the MAC forwarding table.
Step 43: after a network operator starts a loopback detection function from MEP1 to MIP2, MEP1 sends a loopback detection message with a destination MAC address of MIP2 address 00-11-22-00-00-71.
Step 44: after receiving the loopback detection message, each BIER switch selects an MAC forwarding table according to the address filtering table to forward the message until the BIER switch 7 terminates the message according to the target MAC address of the loopback detection message.
Specifically, after receiving the loopback detection message sent by MEP1, BIER switch 2 searches the address filtering table based on the destination MAC address 00-11-22-00-00-71 of the message, and selects MAC forwarding according to the address filtering table, so that BIER switch 2 performs MAC forwarding on the message based on the destination MAC address of the message, and sends the message to its next hop BIER switch 4.
Since BIER switch 4 is configured with MIP, after receiving the loopback detection message forwarded by BIER switch 2, BIER switch 4 compares destination MAC address 00-11-22-00-00-71 of the message with the address of MIP1 configured on BIER switch 4, and as a result of the comparison, the destination MAC address of the message is not consistent with the address of MIP1, BIER switch 4 continues to forward the loopback detection message, i.e., looks up the address filtering table based on destination MAC address 00-11-22-00-71 of the message, and selects MAC forwarding according to the address filtering table, so BIER switch 4 performs MAC forwarding on the message based on the destination MAC address of the message, and sends the message to its next hop BIER switch 7.
Since the BIER switch 7 is configured with MIP, after receiving the loopback detection message forwarded by the BIER switch 4, the BIER switch 7 compares the destination MAC address 00-11-22-00-00-71 of the message with the address of MIP1 configured on the BIER switch 7, and as a result of the comparison, the destination MAC address of the message is consistent with the address of MIP1, so that the BIER switch 7 does not forward the loopback detection message any more, and the loopback detection message is terminated by MIP1 and further processed.
EXAMPLE five
For the loopback detection device of the two-layer network in the above embodiment of the present invention, an embodiment of the present invention further provides a two-layer network.
Any network node in the two-layer network is used for sending MIP addresses for detecting the BIER forwarding table or MIP addresses for detecting the MAC forwarding table to all the other network nodes in the two-layer network after configuring a maintenance intermediate point MIP for explicitly copying the BIER forwarding table by a detection bit index or a MIP for detecting the MAC forwarding table by a medium access control;
the maintenance end point MEP in the two-layer network is used for sending a loopback detection message carrying a target MIP address after starting a loopback detection function from the MEP to the target MIP;
and any network node in the two-layer network is used for forwarding the loopback detection message based on the BIER forwarding table or based on the MAC forwarding table according to the target MIP address when the MIP is not configured at the network node or the configured MIP address is inconsistent with the target MIP address after the loopback detection message is received.
Further, any network node in the two-layer network is further configured to terminate the loopback detection packet after receiving the loopback detection packet and when the address of the MIP configured by the network node is consistent with the target MIP address.
Further, any network node in the two-layer network is further configured to, when receiving a MIP address for detecting the BIER forwarding table, add the received MIP address to the address filtering table, and configure the received MIP address as a MIP address forwarded based on the BIER forwarding table; when receiving a MIP address for detecting the MAC forwarding table, adding the received MIP address to an address filtering table, and configuring the received MIP address as a MIP address forwarded based on the MAC forwarding table;
correspondingly, any network node in the two-layer network is specifically configured to select forwarding based on the BIER forwarding table or forwarding based on the MAC forwarding table for the loopback detection packet by comparing the target MIP address with the MIP address in the address filtering table of the network node.
Here, the MIPs located on the same loopback detection message transmission path are simultaneously configured as MIPs for detecting BIER forwarding tables or MIPs for detecting MAC forwarding tables.
Here, the address of the target MIP is the unicast MAC address of the port where the target MIP is located.
In practical applications, any network node in the two-layer network may be a device such as a switch that supports both BIER forwarding and MAC forwarding.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (10)

1. A loopback detection method for a two-layer network, the method comprising:
after any network node in the two-layer network is configured with a maintenance intermediate point MIP for detecting bit index explicit copy BIER forwarding table or a MIP for detecting media access control MAC forwarding table, an MIP address for detecting the BIER forwarding table and an instruction for detecting the BIER forwarding table by the MIP or an instruction for detecting the MAC forwarding table by the MIP are sent to all other network nodes in the two-layer network;
after starting the loopback detection function from the maintenance end point MEP to the target MIP, the MEP sends a loopback detection message carrying the target MIP address;
after any network node in the two-layer network receives the loopback detection message, when the network node is not configured with MIP or the configured MIP address is inconsistent with the target MIP address, forwarding based on a BIER forwarding table or forwarding based on an MAC forwarding table is carried out on the loopback detection message according to the target MIP address.
2. The method of claim 1, further comprising: after any network node in the two-layer network receives the loopback detection message, when the address of the MIP configured by the network node is consistent with the target MIP address, the loopback detection message is terminated.
3. The method of claim 1, further comprising:
when any network node in the two-layer network receives a MIP address for detecting a BIER forwarding table, the received MIP address is added to an address filtering table, and the received MIP address is configured to be a MIP address forwarded based on the BIER forwarding table; when any network node in the two-layer network receives an MIP address for detecting the MAC forwarding table, the received MIP address is added to an address filtering table, and the received MIP address is configured to be the MIP address forwarded based on the MAC forwarding table;
correspondingly, the forwarding based on the BIER forwarding table or the forwarding based on the MAC forwarding table of the loopback detection packet according to the target MIP address includes:
the network node selects the loopback detection message to carry out forwarding based on a BIER forwarding table or forwarding based on an MAC forwarding table by comparing the target MIP address with the MIP address in the address filtering table.
4. The method of claim 1, further comprising: and simultaneously configuring the MIPs positioned on the same loopback detection message transmission path into MIPs for detecting the BIER forwarding table or MIPs for detecting the MAC forwarding table.
5. The method of claim 1, wherein the address of the target MIP is a unicast MAC address of a port where the target MIP is located.
6. A two-layer network is characterized in that any network node in the two-layer network is used for sending an MIP address for detecting a BIER forwarding table and an indication that the MIP is used for detecting the BIER forwarding table or an indication that the MIP address for detecting the MAC forwarding table and the MIP are used for detecting the MAC forwarding table to all the other network nodes in the two-layer network after configuring a maintenance intermediate point MIP for detecting a bit index explicit copy BIER forwarding table or a MIP for detecting a media access control MAC forwarding table;
the maintenance end point MEP in the two-layer network is used for sending a loopback detection message carrying a target MIP address after starting a loopback detection function from the MEP to the target MIP;
and any network node in the two-layer network is used for forwarding the loopback detection message based on the BIER forwarding table or based on the MAC forwarding table according to the target MIP address when the MIP is not configured at the network node or the configured MIP address is inconsistent with the target MIP address after the loopback detection message is received.
7. The two-layer network according to claim 6, wherein any network node in the two-layer network is further configured to terminate the loopback detection packet after receiving the loopback detection packet and when an address of the MIP configured by the network node is consistent with the target MIP address.
8. The two-tier network of claim 6, wherein any network node in the two-tier network is further configured to add the received MIP address to the address filter table upon receiving the MIP address for detecting the BIER forwarding table, and configure the received MIP address as a MIP address forwarded based on the BIER forwarding table; when receiving a MIP address for detecting the MAC forwarding table, adding the received MIP address to an address filtering table, and configuring the received MIP address as a MIP address forwarded based on the MAC forwarding table;
correspondingly, any network node in the two-layer network is specifically configured to select forwarding based on the BIER forwarding table or forwarding based on the MAC forwarding table for the loopback detection packet by comparing the target MIP address with the MIP address in the address filtering table of the network node.
9. The two-layer network of claim 6, wherein the MIPs located on the same loopback detection message transmission path are simultaneously configured as MIPs for detecting BIER forwarding tables or MIPs for detecting MAC forwarding tables.
10. Layer two network according to claim 6, wherein the address of the target MIP is the unicast MAC address of the port on which the target MIP is located.
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Publication number Priority date Publication date Assignee Title
CN112311668B (en) * 2019-07-26 2022-03-29 华为技术有限公司 Method, network device and system for processing BIER message
CN113162855B (en) * 2020-01-22 2022-12-27 华为技术有限公司 Multicast message detection method, network equipment and system
CN111817958B (en) * 2020-06-10 2023-04-07 新华三信息安全技术有限公司 Message forwarding method and network equipment

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101013960A (en) * 2007-02-12 2007-08-08 华为技术有限公司 Method and apparatus for obtaining physical address of Ethernet node
CN101179479A (en) * 2006-11-09 2008-05-14 华为技术有限公司 Method, system and node for transmitting operation management and maintenance packet of ethernet
CN101345711A (en) * 2008-08-13 2009-01-14 成都市华为赛门铁克科技有限公司 Packet processing method, fire wall equipment and network security system
CN101499950A (en) * 2008-01-30 2009-08-05 华为技术有限公司 Service provider backbone transmission ring multicast method, multicast ring network and node equipment
CN101527727A (en) * 2008-03-05 2009-09-09 日本电气株式会社 Communication device and operation management method
CN101697525A (en) * 2009-10-14 2010-04-21 中兴通讯股份有限公司 Looped network based configuration and data transmission method and system of address forwarding table
CN101820363A (en) * 2009-02-27 2010-09-01 中国电信股份有限公司 Ethernet port loopback detection method and multi-service transport platform
CN102571587A (en) * 2012-01-13 2012-07-11 大唐移动通信设备有限公司 Method and equipment for forwarding messages
CN102801575A (en) * 2011-05-27 2012-11-28 华为技术有限公司 Loopback detecting method and device
CN102833122A (en) * 2011-06-17 2012-12-19 中兴通讯股份有限公司 Loopback detection method and system
CN103378998A (en) * 2012-04-27 2013-10-30 中兴通讯股份有限公司 Method and device for Ethernet port loopback detection
CN105791048A (en) * 2016-03-01 2016-07-20 上海斐讯数据通信技术有限公司 Loopback detection method and device and network equipment containing the device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10218524B2 (en) * 2013-09-17 2019-02-26 Cisco Technology, Inc. Bit indexed explicit replication for layer 2 networking

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101179479A (en) * 2006-11-09 2008-05-14 华为技术有限公司 Method, system and node for transmitting operation management and maintenance packet of ethernet
CN101013960A (en) * 2007-02-12 2007-08-08 华为技术有限公司 Method and apparatus for obtaining physical address of Ethernet node
CN101499950A (en) * 2008-01-30 2009-08-05 华为技术有限公司 Service provider backbone transmission ring multicast method, multicast ring network and node equipment
CN101527727A (en) * 2008-03-05 2009-09-09 日本电气株式会社 Communication device and operation management method
CN101345711A (en) * 2008-08-13 2009-01-14 成都市华为赛门铁克科技有限公司 Packet processing method, fire wall equipment and network security system
CN101820363A (en) * 2009-02-27 2010-09-01 中国电信股份有限公司 Ethernet port loopback detection method and multi-service transport platform
CN101697525A (en) * 2009-10-14 2010-04-21 中兴通讯股份有限公司 Looped network based configuration and data transmission method and system of address forwarding table
CN102801575A (en) * 2011-05-27 2012-11-28 华为技术有限公司 Loopback detecting method and device
CN102833122A (en) * 2011-06-17 2012-12-19 中兴通讯股份有限公司 Loopback detection method and system
CN102571587A (en) * 2012-01-13 2012-07-11 大唐移动通信设备有限公司 Method and equipment for forwarding messages
CN103378998A (en) * 2012-04-27 2013-10-30 中兴通讯股份有限公司 Method and device for Ethernet port loopback detection
CN105791048A (en) * 2016-03-01 2016-07-20 上海斐讯数据通信技术有限公司 Loopback detection method and device and network equipment containing the device

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