WO2015070383A1

WO2015070383A1 - Link aggregation method, apparatus, and system

Info

Publication number: WO2015070383A1
Application number: PCT/CN2013/086985
Authority: WO
Inventors: 陈锐; 张钦剑; 李成刚
Original assignee: 华为技术有限公司
Priority date: 2013-11-12
Filing date: 2013-11-12
Publication date: 2015-05-21
Also published as: CN105122737A

Abstract

Embodiments of the present invention disclose a link aggregation method, apparatus, and system. The method is applied in a communications network. The communications network comprises a first device and a second device. The first device receives a service packet from the second device through a first link where a first port is located; the first device receives a link aggregation control protocol packet from the second device through a second link where a second port is located, the link aggregation control protocol packet being used for configuring a link aggregation group; and the first device responds to the link aggregation control protocol packet, and keeps a forwarding state of the first port to continue to receive a service packet from the second device. By means of the technical solutions, when an aggregation group is configured in a network, a physical port is set to normally forward a service packet during a protocol negotiation process, which does not cause service interruption.

Description

Method, device and system for link aggregation

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for link aggregation. Background technique

Link aggregation (Ligation Aggregation) is to bind multiple physical ports of a network device to a logical port to implement load balancing of the inbound/outbound traffic on each member port. The packet is determined by a certain load balancing policy. From which member port to send. When the device detects that the link of one of the member ports is faulty, the device stops sending packets on the port and recalculates the port for sending packets on the remaining link according to the load balancing policy. After the faulty port is restored, it is restored again. Calculate the packet sending port. Link aggregation is an important technology in terms of increasing link bandwidth and reporting link security.

In the prior art, when the aggregation operation is performed in the network, the aggregation configuration of the two devices cannot be completely synchronized, and the configuration process is completed. After the negotiation succeeds, the port cannot send or receive service packets, which inevitably causes services. The interruption. For example, as shown in Figure 1: Before the two parties negotiate successfully, only the protocol packets can be forwarded and the service packets cannot be forwarded. After the negotiation succeeds, the protocol packets and service packets can be forwarded. In addition to service interruption, if the management channel also depends on these two ports, the device is at risk of being disconnected. When locating and troubleshooting network problems, it is often necessary to repeatedly change the aggregation configuration, causing repeated business interruptions and long interruptions.

Summary of the invention

In view of this, the embodiments of the present invention provide a method, an apparatus, and a system for link aggregation to solve the above technical problem.

In a first aspect, a method for link aggregation is applied to a communication network, where the communication network includes a first device, the first device includes a first port and a second port, and includes the first port a first link that is connected to the second device and a second link that is connected to the second device by the second port, where the first port is in a forwarding state, the method includes the first device passing the The first port receives the service packet from the second device; the first device receives the link aggregation control protocol packet from the second device by using the second port, where the link aggregation control protocol The packet is used to configure a link aggregation control protocol aggregation group; the first device responds to the link aggregation control protocol packet, and maintains a forwarding state of the first port to continue to receive from the first port. The service packet of the second device, and the link aggregation relationship between the second port and the first port, so that the link aggregation of the first link and the second link is implemented.

In a first possible implementation manner of the first aspect, after the link aggregation of the first link and the second link is successful, setting the first port to a semi-blocking state, so that the A device continues to receive the service packet sent by the second device by using the first port.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the method further includes: when the first port of the first device is in a semi-blocking state, When the state of the port of the second device corresponding to the first link is also in a semi-blocking state, the first port is set to be in a blocking state, so that the first link cannot forward service packets.

With the above technical solution, when the aggregation group is configured on the network, the aggregation configuration of the two devices is not synchronous. However, the physical port does not interrupt the service because the physical port forwards the service packets.

In a second aspect, a method for link aggregation is applied to a communication network, where the communication network includes a first device, the first device includes a first port, and includes a second device connected to the second device by using the first port. a first link, the method comprising: the first device receiving a service packet from the second device by using the first port; the first device receiving, by the first port, the second device The link aggregation control protocol packet, the link aggregation control protocol packet is used to configure a link aggregation group, and the first device responds to the link aggregation control protocol packet to maintain forwarding of the first port. And continuing to receive a service packet from the second device by using the first port, and establishing a link aggregation control protocol aggregation of the first link.

In a third aspect, a network device is applied to a communication network, including a first port, a second port, a data transceiver, an aggregator, and a first link connected to the second device by using the first port, and by using the a second port to which the second port is connected, the first port and the second port are coupled to a data transceiver, and the data transceiver is connected to the aggregator, wherein the data is a transceiver, configured to receive a service packet from the second device by using the first port, and receive, by using the second port, a link aggregation control protocol packet sent by the second device, where the received chain is The aggregating control protocol packet is sent to the aggregator; the aggregator is configured to respond to the link aggregation when the first link and the second link join the link aggregation control protocol aggregation group. Controlling the protocol packet, keeping the first port in a forwarding state, instructing the data transceiver to continue receiving service packets from the second device, and establishing the second port and the first Link port aggregation relationship.

In a first possible implementation manner of the third aspect, the aggregator is further configured to: after the first link and the second link are successfully aggregated, set the first port to be in a semi-blocking state, The first device is configured to continue to receive the service packet sent by the second device by using the first port.

In a second possible implementation manner of the third aspect, the aggregator is further configured to: when the first port of the first device is in a semi-blocking state, and the second port corresponding to the first link When the state of the port of the device is also in the semi-blocking state, the first port is set to be in a blocking state, so that the first link cannot forward service packets.

Through the above technical solution, when an aggregation group is configured on the network, the aggregation configuration of the two devices is not It is a synchronous operation. However, the physical port is normally forwarded by the physical port during the protocol negotiation process. Therefore, no service interruption occurs.

In a fourth aspect, a network device is applied to a communication network, where the network device is configured with a first port, the first port is coupled to a data transceiver, and the network device and the second device pass the first The port is provided with a first link, the first port is in a forwarding state, and the network device includes a data transceiver, configured to receive a service packet or a link aggregation control protocol packet sent by the second device; And when the first link joins the link aggregation group, in response to the link aggregation control protocol, maintaining the first port of the first link in a forwarding state, to continue to receive through the first port. a service message from the second device, and a link aggregation establishing the first link.

A fifth aspect, a link aggregation system, where the system includes at least two network devices, where the any one of the first to second possible implementations of the third aspect or the third aspect A network device as described or a network device as described in the fourth aspect.

With the above technical solution, when the aggregation group is configured on the network, the aggregation configuration of the two devices is not synchronous. However, the physical port is forwarded normally during the protocol negotiation. Therefore, no service interruption occurs.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

FIG. 1 is a schematic diagram of service interruption caused by configuration aggregation in the prior art;

2a is a schematic diagram of LACP aggregation configuration of a single link according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a single-link LACP aggregation method according to an embodiment of the present invention; FIG. 3 is a schematic diagram of LACP aggregation of a single link extended to dual links according to an embodiment of the present invention; FIG. The flow chart of the LACP method for extending a single link into a dual link provided by the example;

FIG. 4 is a schematic diagram of a generalized aggregation and LACP aggregation according to an embodiment of the present invention; FIG. 4b is a schematic flowchart of a general aggregation and LACP aggregation method according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a network device according to an embodiment of the present invention.

Specific embodiment

The technical solutions in the embodiments of the present invention will be described in detail with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without the creative work are all within the scope of the present invention.

Link Aggregation Control Protocol (LACP)^ The control protocol for implementing link aggregation in the IEEE 802.ad standard. Through this protocol, information is exchanged between partner systems at both ends of a link to allow their link aggregation control instances to agree on the identity of the link aggregation group to which the link belongs, and to move the link to the link aggregation group. And perform its send and receive functions in an orderly manner. The LACP protocol uses the interaction of LACPDUs to implement automatic link selection in the aggregation scenario and automatic sensing and reselection of link changes to automatically control the normal operation of link members in the aggregation group.

The protocol packet contains the following information: Actor and partner system priority, local and peer system ID (identifier), local and peer port operation key Key, local and pair The port priority of the port, the port ID of the local end and the peer end, and the port status of the local end and the peer end. Based on the information, the two parties of the aggregation select the appropriate link according to a certain selection algorithm, and control the state of the aggregation. The selected member link can forward the traffic normally, and the unselected member link will be blocked. No traffic can be forwarded. The total bandwidth of the aggregated link is equal to the sum of the bandwidths of the selected member links, and the traffic on the aggregated link is distributed to each selected member link according to certain rules. Because the LACPDUs are periodically exchanged, that is, the two parties send the protocol packets to each other at regular intervals. Therefore, when the selected member links cannot work for some reason, the link aggregation can be quickly detected and reset. Link status, set the link to be blocked, and traffic is reassigned to other selected member links.

Since dynamic link aggregation is a complete event-driven system, every action in its entire work process is triggered by events, and the order and time of occurrence of these events are random, and the events can be in any order. Appear at any time. Manage and control the operation of the LACP protocol through a logical system that can be called an aggregator, including port status change, data forwarding, LACP protocol packet transmission, parsing received packets, adjusting link status, and handling various Abnormal and so on.

Embodiment 1

The embodiment of the present invention provides a method for link aggregation, which is applied to a communication network system, where the network system includes a first device 20 and a second device 22, where the first and second devices may be access devices and routes. A device or switch or any other network device that can use the link aggregation control protocol. As shown in FIG. 2a, the first device 20 and the second device 22 are provided with a link aObO. The link a0b0 is not configured with an LACP aggregation group, and the current service is normally forwarded, that is, the first device 20 transmits and receives normally through the port a0. The LACPDU of the second device 22.

An LACP aggregation group is configured for the single-link network. The configuration of the LACP aggregation group is static and dynamic. The static configuration specifies the end of the aggregation. Port, and then rely on the LACP protocol interaction between the two devices on the aggregation link to dynamically select which port forwarding service (the port state is the forwarding state Forward), which ports cannot forward the service (the port state is the blocking state Block), and the link is real-time according to the link. Change to adjust strategy and re-select. The embodiment of the present invention is to dynamically configure an LACP aggregation group as an example, but the present invention is not limited to the described configuration process, as shown in FIG. 2a and FIG. 2b, including:

The current state: Before the LACP aggregation group is configured, the first device 20 and the second device 22 are single-link connections, and no link aggregation is performed, and the service forwarding is normal, that is, the port a0 of the first device 20 is in the forwarding state, and the second device 22 is in the forwarding state. Port b0 is in the forwarding state.

S210. Configure the LACP protocol on the first device 20 and the second device 22, respectively.

Configuring the LACP protocol is accomplished through a logical system called an aggregator. The logical system is implemented by a software system control hardware system. For a detailed description of the aggregator, reference may be made to the standard IEEE Standard 802.ad, which is not described here.

Further, the configuration of the LACP protocol, that is, the various parameters of the port a0 of the first device 20 in the LACPDU are still configured and forwarded according to the standard IEEE Standard 802.ad. The structure of the LACP protocol is as follows:

Address information: Destination address, Source Address;

Length / Type (Length / Type);

Subtype (Subtype);

Version number (Version Number);

Local TLV and local information length (Actor_Information_Length);

Local information (including: local system (Actor_System), local key value (Actor_Key), local port priority (Actor Port Priorty), local port (Actor_Port), and local state (Actor_ State) );

Reserved field (Reserved);

TLV of the opposite end and the length of the peer information (Partner_Information_Length);

Peer information (including: Partner-System, Partner _Key, Partner Port Priorty, Partner _Port, and Partner State) ); as well as

Reserved field (Reserved);

The details are shown in Table 1.

Octets

E^tinat rs Address 6

S me Address 6

Ler th ;pe 2

Su ty e " LACP

Rsion tTO er 1

LV^ty e Actor <?rm tj n

AC— System— Priority

A.Gt r ^S stem 6

2

■2

ctOf ..P rt 2

Actor ..Slate

TLV"-3⁄4' ^ Partner Snf rm ti n OCTETS iTHi

FBAM E TRA SMUTE

Pai1:n ;r.. ;nfoFmalion.. Length ":≤0 TO P -TO- BOTTO M

Part rs©i..S stenn:

Part r^ser...POF1.. P riorit z

Partne P r 2 3

C liectot" ax D

Re e ed

TLV...t e Bi'minator 1

Reser ed

PCS 4

After the port a0 of the first device 20 is successfully configured with the LACP protocol, the port a0 uses the LACPDU to notify the second device 22 of the local system priority, system MAC, port priority, port number, and Operation key Key, etc. After receiving the packet, the second device 22 selects the port b0 and a0 to perform the corresponding LACP aggregation operation according to the information of the stored port. The process is the process in which the first device selects the port where the second device participates in the LACP aggregation. Reference can be made to the standard IEEE Standard 802.ad.

After determining that the second device 22 is participating in the LACP aggregation port, the ports a0 and b0 start the LACP aggregation negotiation process as follows:

For example, the physical address of the first device 20 is 00d0.f800.0001, and the system priority is 61430 (the greater the priority value, the smaller the priority), the physical address of the second device 22 is 00d0.f800.0002, and the system priority The level is 3096. After receiving the LACPDU sent by the first device 20, the second device 22 finds that its own system has a higher priority, and then sets the port b0 to be in the LACP aggregation state. Then, the second device 22 sends a protocol packet to the first device 20 that the b0 port is in the aggregated state, and the first device 20 receives the LACP packet that is updated by the second device 22, and finds that the system priority of the peer end is relatively high, and The port has been set to the aggregation state, so the first device 20 also sets the port a0 to the aggregation state.

Further, in the structure of the LACP packet shown in Table 1, the Actor_State field (the red box portion in the table) is 1 byte and 8 bit bits, wherein the 8 bit bits are:

LACP Activity: Yes

LACP Timeout: No

Aggregation: Yes

Synchronization: No

Collecting: No

Distributing: No

Defaulted: Yes Expired: No

If the Synchronization bit is Yes, the port negotiation is successful. In this case, the Collecting and Distributing states are changed to Yes. The descriptions of the above 8 bit bits are all existing technologies. For details, refer to the standard IEEE Standard 802.ad, which will not be described here.

It should be noted that, in the embodiment of the present invention, the manner in which the first device a0 selects which port of the second device is specific is not limited to the above example. The process of how the first device and the second device select which ports to participate in the aggregation group is a prior art, and please refer to the standard IEEE Standard 802.ad.

In this step of the embodiment of the present invention, when the LACP protocol is configured, the port a0 of the first device 20 is set, so that the state of the physical port a0 is still in the forwarding state, and the service packet can be forwarded normally, so that the service is not interrupted. . The configuration herein may be implemented by a software system, or may be implemented by a hardware system, or may be implemented automatically, or may be manually implemented. The embodiment of the present invention does not limit a specific implementation manner.

It is to be noted that the forwarding state is that the port can receive both the service packet and the service packet. The blocking state can only forward the LACP protocol packet and cannot forward the service packet.

S220: The first device and the second device negotiate the LACP protocol successfully, and the first device sends the forwarding state to the physical port a0.

In this embodiment, after the LACP negotiation succeeds, the first device does not need to change the state of the physical port, because the state of the port of the aggregation group is set to the forwarding state (Forward) in S210, and the service packet is forwarded normally.

The solution used in the embodiment of the present invention can solve the problem of service interruption when the LACP aggregation group is configured, and implement seamless handover of service packets when the link state changes. Embodiment 2

The second embodiment of the present invention provides a method for configuring an LACP aggregation group, which is applied to a single-link extension to a dual-link LACP aggregation group. Before the LACP aggregation group is configured, the device 30 and the device 32 are single-link connections. The traffic forwarding is normal, that is, the service forwarding is normal, that is, the port a0 of the device 30 is in the forwarding state, and the port b0 of the device 32 is in the forwarding state, as shown in FIG. 3a and FIG. 3b, including:

S410. Configure the LACP protocol on the device 30 and the device 32, respectively.

In the embodiment of the present invention, the LACP protocol may be configured on the device 30, or the LACP protocol may be configured on the device 32, and the LACP protocol may be configured on the device 30 and the device 32. The embodiment of the present invention is not limited to the configuration. Which device is in order. After the LACP protocol is configured on the device 30, the device 30 is configured with the LACP protocol, and then sends the LACP protocol packet to the device 32. The device 32 selects the port bO and aO to perform the LACP aggregation operation according to the information of the stored port. Select port bl and a1 to participate in LACP aggregation on the same port bO and port aO.

Further, in the interaction process of selecting the port to participate in the LACP aggregation, the device 30 maintains the forwarding state of the port a0, so that the service packet from the device 32 can still be continuously received during the establishment of the LACP aggregation group, that is, in the aggregation group. At least one link is in the forwarding state and is not affected by the LACP protocol. Therefore, services are not interrupted during the configuration process. The service is still forwarded through the aO and bO ports or forwarded through the ao and b0, al, and bl links.

S320, LACP negotiation process of device 30 and device 32;

At this time, there are two available links between the device 30 and the device 32. Therefore, the service packets are forwarded according to the aggregation principle. The LACP protocol of the device 30 and the device 32 have not been negotiated successfully, and the service forwarding is not affected. Because aO and bO are capable of forwarding service messages.

S330, when the LACP negotiation between the device 30 and the device 32 is successful, all physical terminals in the aggregation group are set. The port state is a forwarding state;

The LACP negotiation between the device 30 and the device 32 is successful, indicating that at least one link in the aggregation group is in the collection and distribution state, that is, the aggregation and distributing states are Yes. Then, all the physical port states in the aggregation group are set to the forwarding state.

S340, if the LACP negotiation between the device 30 and the device 32 is to block the link aObO, so that the link alb1 is a forwarding link, after the negotiation ends, the first device sets the a0 port to a semi-blocking state, and then, the second device The b0 port is set to a semi-blocking state, and when both a0 and b0 are in a semi-blocking state, the first device and the second device respectively set a0 and b0 to a blocking state.

Specifically, the devices of the two ports a0 and b0 are respectively set, and there is a time difference, which is the same as that described in step S210. If the second device 22 finds that its own system has a higher priority, the port b0 is set to a semi-blocking state. Sending the LACP packet to the first device 20, the first device 30 receives the LACP packet updated by the second device 32, and finds that the system priority of the peer device is high, and the port has been set to a semi-blocking state, so the port is set to half. In the blocking state, the LACP packet is sent to the second device. After the second device finds that both a0 and b0 are in the semi-blocking state, set b0 to the blocking state. Repeat the above process until the ports a0 and b0 are in the blocking state.

Further, as shown in Table 1, we use the first bit of the reserved field (the red box part of the table) after the Actor_State to indicate the semi-blocking state, and the bit value of the transmitted message is 1 The local port is in the semi-blocking state. If the value is 0, the port is not in the semi-blocking state. The semi-blocking state is used to identify that the port can only receive service packets and cannot send service packets.

By using the above technical solution, the problem of service interruption is solved when the single link is extended to the dual-link LACP aggregation group. If the configuration fails, the service packet can only be received and cannot be sent because the port a0 is set to the semi-blocking state. Therefore, the service packets sent from the port b0 are not lost. Seamless switching of service packets when the status of the road changes.

Embodiment 3

The embodiment of the present invention further provides a method for configuring an LACP aggregation group, which is applied to an aggregation of an ordinary aggregation to an LACP. As shown in FIG. 4a and FIG. 4b, before the LACP aggregation is configured, the two devices are respectively the device 40 and the device 42. The device 40 and the device 42 are connected by two links aObO and alb1, and the link aObO and the link altb are in the normal aggregation group, and the ports a0, b0, a, and bl are all in the forwarding state, including:

S410, the device 40 and the device 42 configure the LACP to adjust the normal aggregation state of the two links between the device 50 and the device 52 to the aggregation state of the LACP.

In this step, the aggregation of the general aggregation of the device 40 or the device 42 can be implemented by adding an LACP aggregator. Before the negotiation of the LACP protocol is successful, the operation of the aggregator is not affected, and the actual physical port is not affected. The process of configuring the LACP protocol is the same as that of step S210, and is not described here.

S420, device 40 and device 42LACP negotiation process;

In this step, the specific process of negotiation can refer to the description of step S320.

S430, the LACP negotiation between the two devices is successful. In this case, the status of the collection and distribution of the at least one link is YES, and the physical port status of the link is set to the forwarding state, and the service forwarding is normal.

S530. If the result of the LACP negotiation is that one link is in the forwarding state and the other link is in the blocking state, the port blocked by the link is set to a semi-blocking state. When both ports are in a semi-blocking state, the two ports are Set to the blocking state;

In this step, as shown in Table 1, we use the first bit of the reserved field (red box in the table) after the Actor_State to represent the semi-blocking state, and the bit value in the transmitted message is 1 means The local port is already in a semi-blocking state. A value of 0 indicates that it is not a semi-blocking state. The semi-blocking state is used to identify that a port can only accept service packets and cannot send service packets. When the local port is in the semi-blocking state, if the packet from the peer device is notified that the peer is also in the semi-blocking state, the local port is set to the blocking state.

By using the above technical solution, the problem of business interruption is solved when the ordinary aggregation is expanded into LACP aggregation. If the configuration is unsuccessful, the service packet can only be received and cannot be sent. Therefore, the service packets sent from the port b0 are not lost. Seamless switching.

Embodiment 4

The embodiment of the present invention further provides a network device, which may be an access device, a routing device, or a switch, or any other network device that can use a link aggregation control protocol. The access device may be a DSLAM (Digital Subscriber Line Access Multiplexer), an OLT (Optical Line Terminal), or an MSAN (Multiservice Access Node).

As shown in FIG. 5, the provided network device 50 is connected to the device 60 through a plurality of links, and the plurality of links form an aggregation group. The network device 50 is provided with a first port a0 and a second port a1, the first port a0 and the second port a1 are coupled to a data transceiver, and the network device is connected to the second device through the first port The first link, the network device is connected to the second device by using a second port, where the first port is in a forwarding state.

The data transceiver 510 forms a plurality of links through the plurality of ports, and the network device 50 connects the devices 60 through the plurality of links.

The data transceiver 510 can be used to receive the LACP packet and the service packet sent by the peer end 60, and can also be used to send the LACP packet to the device 60 and the service packet. The aggregator 520 is configured to set the physical port of the network device to be in a forwarding state, a blocking state, or a semi-blocking state.

The aggregator 520 sets the physical port of the network device 50 corresponding to the multiple links to the forwarding state when the LACP protocol is configured. When the LACP negotiation is successful, the physical port of the network device 50 is not changed, that is, the physical port of the network device 50 is in the forwarding state. When the LACP negotiation result is that one of the links is blocked, the physical port of the network device 50 corresponding to the blocked link is set to a semi-blocking state until the physical ports of the network device 50 and the device 60 are semi-blocking. When the physical port of the network device 50 is set to the blocking state. The configuration of the LACP protocol can be performed through the network management system or the command line.

Further, the aggregator 520 may specifically include a forwarding logic 521 and a CPU (Central Processing Unit) 522.

The forwarding logic 521 is configured to configure the LACP protocol packet, including obtaining the address information, the type information, the version number, the peer device information, and the like in the LACP packet sent by the peer end.

The CPU 522 can be used to monitor events and control the forwarding logic 521 to send LACP protocol messages. The events monitored by the CPU can include the status of the physical port, the aggregation group setting success, the aggregation group setting failure, the power-on or other set events.

The forwarding state identifies that the physical port can send and receive protocol packets and service packets. The blocked state identifies that the physical port can only send and receive protocol packets, and cannot receive and send service packets. The semi-blocking state identifies the port. Sends and receives protocol packets, receives service packets, and cannot send protocol packets. Generally, the aggregator 520 uses the CPU 522 to set the state of the port, and can use the Forward flag to indicate the forwarding state, the Block flag to block the state, and the Half-Block to identify the semi-blocking state.

When the CPU 522 detects that the LACP aggregation group is configured successfully, the CPU 522 detects the collection and collection of the LACP packets. When the distribution status is yes, set the physical port to the forwarding state. When the CPU 522 monitors that the aggregation group is to block a certain link, that is, when the collection and distribution status of the LACP packet is detected, the physical port of the network device 50 is set to a semi-blocking state, and the LACP protocol packet is sent to the second device. 52. The CPU of the second device 52 also sets its corresponding port to a semi-blocking state. When the states of the ports on both ends are in a semi-blocking state, the state of the port is set to a blocking state.

Embodiment 5

The embodiment of the present invention further provides a link negotiation system. As shown in FIG. 5, the system may be an LACP system, where the system includes at least two network devices, and the structure of any one of the network devices may be referred to FIG. And the description of Embodiment 4 corresponding to FIG. 5, the structure of the system is briefly described as follows: comprising a first network device 50 and a second network device 60, the first network device 50 includes at least one port a0, and the second network device at least Contains a port b0, which is connected by a link between port a0 and port b0, including:

The first network device 50 includes a data transceiver 510 and an aggregator 520. The aggregator 620 pre-sets the state of the physical port a0 of the first network device 50 to a forwarding state before the first network device 50 transmits the LACP protocol. The setting herein may be implemented by a software instruction, may also be implemented by a hardware instruction, or may be implemented by a combination of software and hardware, and the present invention is not limited to any of the above implementation manners.

The first network device 50 sends an LACP protocol packet to the second network device 60, where the packet carries the physical address, type, length, version number, and device information of the port a0 of the first network device 50, such as the priority and status of the port a0. , key values and other information;

The second network device 60 sends an LACP protocol packet to the first network device 50, where the packet carries the physical address, type, length, version number, and device information of the port b0 of the second network device 60, such as the priority and status of the port B0. , key values and other information; The first network device 50 and the second network device 60 perform the LACP protocol negotiation. When the negotiation succeeds, the state of the physical ports a0 and b0 is not changed. When the negotiation fails, the physical port a0 is set to a semi-blocking state. At this time, a0 can still receive the service packet sent by physical port b0, and then set physical port b0 to be semi-blocking state. At this time, a0 and b0 negotiate that both ports are half-blocked, and a0 and B0 is a blocked state.

The solution used in the embodiment of the present invention can solve the problem of service interruption when configuring a LACP aggregation group. If the negotiation fails or the result of the negotiation is to block a link, since the port a0 is set to the semi-blocking state, the packet can only be received and cannot be sent for the first network device 50, so that the service packet sent from the port b0 is sent. The text is not lost, and the service packets are seamlessly switched when the link status changes.

A person skilled in the art can understand that all or part of the various methods of the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, and the storage medium can include: A disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

The data processing method, device, and system provided by the embodiments of the present invention are described in detail above. The general technical personnel, according to the idea of the present invention, may have changes in specific implementation manners and application scopes. The contents of this specification are not to be construed as limiting the invention.

Claims

claims

1. A method of link aggregation, applied to a communication network, characterized in that the communication network includes a first device, the first device includes a first port and a second port, and includes: through the first port a first link connected to the second device and a second link connected to the second device through the second port, the first port being in a forwarding state, and the method includes:

The first device receives a service message from the second device through the first port; the first device receives a link aggregation control protocol message from the second device through the second port, The link aggregation control protocol message is used to configure a link aggregation control protocol aggregation group;

The first device responds to the link aggregation control protocol message, maintains the forwarding state of the first port to continue receiving service messages from the second device through the first port, and establishes the third The link aggregation relationship between the two ports and the first port enables link aggregation of the first link and the second link.

2. The method of claim 1, characterized in that, the method further includes:

After link aggregation of the first link and the second link is successful, the first port is set to a semi-blocked state, so that the first device continues to receive the second link through the first port. Service packets sent by the device.

3. The method of claim 2, wherein the method further includes: when the first port of the first device is in a semi-blocked state, and the second port corresponding to the first link When the state of the port of the device is also in the semi-blocked state, the first port is set to the blocked state so that the first link cannot forward service packets.

4. A method of link aggregation, applied to a communication network, characterized in that the communication network includes a first device, the first device includes a first port, and includes communicating with a second device through the first port. The first link to which the device is connected, the method includes:

The first device receives a service message from the second device through the first port; the first device receives a link aggregation control protocol message from the second device through the first port, The link aggregation control protocol message is used to configure a link aggregation group;

The first device responds to the link aggregation control protocol message, maintains the forwarding state of the first port to continue receiving service messages from the second device through the first port, and establishes the third Link aggregation control protocol aggregation of a link.

5. A network device, characterized in that the network device includes:

a first port, a second port, a data transceiver, an aggregator, a first link connected to a second device through the first port, and a second link connected to the second device through the second port , the first port and the second port are coupled to a data transceiver, the data transceiver is connected to the aggregator, wherein,

The data transceiver is used to receive service packets from the second device through the first port, and

Receive the link aggregation control protocol message sent by the second device through the second port, and send the received link aggregation control protocol message to the aggregator;

The aggregator is configured to respond to the link aggregation control protocol message and keep the first port in forwarding mode when the first link and the second link join the link aggregation control protocol aggregation group. state, instructing the data transceiver to continue receiving service packets from the second device, and to establish a link aggregation relationship between the second port and the first port.

6. The network device according to claim 5, wherein the aggregator is further configured to set the first port to semi-blocking after the aggregation of the first link and the second link is successful. state, making everything The first device continues to receive service packets sent by the second device through the first port.

7. The network device according to claim 5, wherein the aggregator is further configured to: when the first port of the first device is in a semi-blocked state, and the first port corresponding to the first link When the state of the port of the second device is also in the semi-blocked state, the first port is set to the blocked state so that the first link cannot forward service packets.

8. A network device, the network device is provided with a first port, the first port is coupled to a data transceiver, the network device and the second device are provided with a first link through the first port , the first port is in the forwarding state, and the network device includes:

A data transceiver, configured to receive service messages or link aggregation control protocol messages sent by the second device;

an aggregator, configured to respond to the link aggregation control protocol when the first link joins the link aggregation group, and keep the first port of the first link in the forwarding state to continue to pass the first link. The port receives the service packet from the second device and establishes link aggregation of the first link.

9. A link negotiation system, the system includes at least two network devices, characterized in that any one of the network devices includes the network device as described in any one of claims 5 to 7 or the network device as claimed in claim 8 The network equipment described.