WO2012174957A1

WO2012174957A1 - Distributed link aggregation method and node therefor

Info

Publication number: WO2012174957A1
Application number: PCT/CN2012/075428
Authority: WO
Inventors: 吴少勇; 魏月华; 敖婷
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-06-24
Filing date: 2012-05-14
Publication date: 2012-12-27
Also published as: CN102843285A

Abstract

A distributed link aggregation method and a node therefor, making possible the use of link aggregation technology in a distributed network. The method comprises: when a node in one network is successfully aggregated with a node in another network, the port to which the node is aggregated successfully is added to a group of successfully-aggregated ports saved in the node, and a link aggregation success information is sent to the other nodes in the network; each node receiving the link aggregation success information then updates, according to the link aggregation success information, the group of successfully-aggregated ports saved in said node. The node comprises an aggregation module, a record module, a notification module and an update module. The present method and node realize link aggregation in a distributed network, expand the field of application of link aggregation technology, and enable distributed networks to use link aggregation to increase link bandwidth, thereby facilitating network maintenance and management.

Description

Distributed link aggregation method and node implementing the same

Technical field

The present invention relates to network communication technologies, and in particular, to a method for distributed link aggregation and a node for implementing the method.

Background technique

According to the definition of the IEEE standard, the Link Aggregation technology logically aggregates multiple physical links between two nodes into one link, and the respective aggregate link ports of the two nodes form a logical port. That is, the aggregation port. For these two nodes, the aggregation port can be considered as a port when the service flow is forwarded. Therefore, link aggregation is also called port aggregation. Link aggregation technology aggregates multiple links with smaller bandwidth into larger-band links, making full use of link resources. As the data of the network grows larger, network nodes need more transmission bandwidth. And link aggregation technology has the advantage of facilitating network maintenance and management, so link aggregation technology has been widely used.

The traditional link aggregation technology networking is the interconnection between two nodes. As shown in Figure 1, nodes S1 and S2 run the link aggregation protocol. According to the protocol of link aggregation, node S1 sends and receives node S2 through port 1. The link aggregation message, or the link aggregation message of the node S2 is sent and received through the port 2, and the node S2 sends and receives the link aggregation message of the node S1 through the port 3, or sends and receives the chain of the node S1 through the port 4. Road aggregation message. According to the link aggregation algorithm, after the aggregation of the ports 1 and 2 of the node S1 is successful, the node S1 aggregates the physical ports 1 and 2 into a successful aggregation port group, that is, the node S1 uses the physical ports 1 and 2 as the aggregation port group of the aggregation port. After the aggregation of the ports 3 and 4 of the node S2 is successful, the node S2 aggregates the physical ports 3 and 4 into a successful aggregation port group, that is, the node S2 uses the physical ports 3 and 4 as members of the successful aggregation port group of the aggregation port. When the node S1 needs to send the service flow to the node S2, the node S1 forwards the service flow from a physical port in the successful aggregation port group according to the characteristics of the service flow, and based on a certain algorithm, so between the nodes S1 and S2 The service flow can be shared on each physical port in the successfully aggregated port group. The link bandwidth between the two nodes is twice that of a single physical port. That is, the bandwidth of the aggregated port is the sum of the aggregated physical ports.

But as the network expands, communication between the two networks requires aggregation of multiple physical links. To form a link, there may be one or more interconnected nodes between the two networks. For link aggregation, there may be multiple nodes at one end, which is also called a distributed network. The traditional link aggregation technology mainly solves the problem of aggregation of multiple physical links between two nodes. That is, the interconnection nodes between the two networks have only one scenario, and cannot be applied to the mutual interaction between the two networks. There are multiple scenes in the connected node. As shown in Figure 2, the two nodes S1 and S3 of the network A are interconnected with the node S2 of the network B. Since the network needs to perform link aggregation on the nodes S1 and S3, according to the traditional link aggregation technology, only the network can be used. The nodes in node A are respectively aggregated with the node S2, and the nodes S1 and S3 cannot be aggregated with the node S2. Therefore, the interconnection link between the network A and the network B is two links instead of one aggregated link. Link aggregation for distributed networks is not possible.

Summary of the invention

The technical problem to be solved by the present invention is to provide a distributed link aggregation method and a node for implementing the same, which provides a possibility for using link aggregation technology in a distributed network.

To solve the above technical problem, the present invention provides a distributed link aggregation method, which includes: after a node in a network is successfully aggregated with a node in another network, the successful aggregation port is added to the successful aggregation saved by the node. The port group advertises the link aggregation success information to other nodes in the network. The node that receives the link aggregation success information updates the successful aggregation port group saved by the node according to the link aggregation success information.

Preferably, the link aggregation success information includes port information of the successfully aggregated port. Preferably, the method further includes: successfully aggregating a port failure event in the port group, the node to which the port belongs removes the port from the successfully aggregated port group, and advertises the link aggregation failure information to other nodes in the network; The node that fails the link aggregation update information updates the successful aggregation port group saved by the local node according to the link aggregation failure information. Preferably, the failure event comprises one or more of the following events: port failure, port mode change, port configuration change.

Preferably, the method further includes: when the node that performs link aggregation in the network sends the service flow through the aggregation link, the service flow is successfully aggregated according to the successfully aggregated port group saved by the node. A port recorded in the port group is sent out.

To solve the above technical problem, the present invention further provides a node for implementing distributed link aggregation, which includes an aggregation module, a recording module, a notification module, and an update module, where:

The aggregation module is configured to: perform link aggregation with nodes in other networks;

The recording module is configured to: after the aggregation of the aggregation module and the node in the other network is successful, add the successfully aggregated port to the successfully aggregated port group saved by the local node;

The notification module is configured to: advertise the link aggregation success information to other nodes in the network; the update module is configured to: after receiving the link aggregation success information, update the success of the node according to the link aggregation success information. Aggregate port group.

Preferably, the link aggregation success information includes port information of the successfully aggregated port. Preferably, the recording module is further configured to: when the port in the successfully aggregated port group fails, delete the port from the successfully aggregated port group;

The notification module is further configured to: notify the other nodes in the network of the link aggregation failure information; the update module is further configured to:: the node that receives the link aggregation failure information updates the node according to the link aggregation failure information. Successful aggregation of port groups.

Preferably, the failure event comprises one or more of the following events: port failure, port mode change, port configuration change.

Preferably, the node further includes a transmission module, configured to: when the service flow is sent through the aggregation link, send the service flow from a port recorded in the successfully aggregated port group according to the saved successful aggregation port group.

Using the above methods and nodes, when each link is aggregated, each node advertises successful link aggregation port information to the network. Finally, each node can learn all the successfully aggregated port information in the network and record it as The port group was successfully aggregated. When a network needs to send a service flow to the peer network, the network forwards the service flow from a physical port in the successful aggregation port according to the characteristics of the service flow and based on a certain algorithm, so the service flow between the networks Able to share In the physical port of the successfully aggregated port group, the link bandwidth between the two networks is the sum of the aggregated physical ports. The embodiment of the present invention implements the link aggregation technology in the distributed network, and expands the link aggregation. The application field of technology enables distributed networks to take advantage of link aggregation to increase link bandwidth and facilitate network maintenance and management. BRIEF abstract

1 is a schematic diagram of a conventional link aggregation technology;

2 is a schematic diagram of link aggregation of a distributed network;

3 is a flowchart of distributed link aggregation according to an embodiment of the present invention;

4 is a schematic view of a first example of the present invention;

Figure 5 is a schematic illustration of Example 2 of the present invention.

Preferred embodiment of the invention

In order to make the objects, the technical solutions and the advantages of the present invention more clearly, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments of the present application may be arbitrarily combined with each other.

This article provides the following options:

After the nodes in the network are successfully aggregated with the nodes in the other network, the nodes that are successfully aggregated are added to the successful aggregation port group saved by the local node, and the link aggregation success information is advertised to other nodes in the network. The node that aggregates the success information updates the successful aggregation port group saved by the local node according to the link aggregation success information.

As shown in Figure 3, the following steps are included:

Step 301: A node in the first network and a node in the second network connected to the node perform link aggregation.

Step 302: After the link aggregation is successful, the node in the first network adds the successfully aggregated port to the successfully aggregated port group, and advertises the link aggregation success information to other nodes in the first network. The link is successfully aggregated. The information includes the port information of the successfully aggregated port. Step 303: After receiving the link aggregation success information, the other nodes in the first network join the successfully aggregated port to the successfully aggregated port group saved by the local node.

The above method is repeated. When the nodes in the first network and the second network complete the link aggregation and advertisement, the nodes in the network record the successfully aggregated port information of the node and other nodes, that is, the nodes in the same network. The content of the successfully aggregated port group saved on the same is the same.

When a port in a successful aggregation port group of a node in the network (that is, a port that has been successfully aggregated) fails, the node deletes the port from the successfully aggregated port group and advertises the port link to other nodes in the network. Aggregation failure information. After receiving the link aggregation failure information, the other nodes in the network update the successful aggregation port group saved by the node according to the link aggregation failure information, that is, the port that failed the event is deleted from the successful aggregation port group. The link aggregation failure information contains the port information of the port where the failure event occurred. Failure events include one or more of the following: port failure, port mode change, port configuration change.

When a node that performs link aggregation on the network sends a service flow through the aggregation link, it sends the service flow from a port recorded in the successful aggregation port group according to the successfully aggregated port group saved in this node.

The nodes implementing the above method include an aggregation module, a recording module, a notification module, and an update module, where:

An aggregation module, configured to perform link aggregation with nodes in other networks;

a recording module, configured to add the successfully aggregated port to the successfully aggregated port group saved by the node after the aggregation of the link between the aggregation module and the other network is successful;

An advertisement module, configured to advertise link aggregation success information to other nodes in the network;

The update module is configured to: after receiving the link aggregation success information, update the successfully aggregated port group saved by the node according to the link aggregation success information. Preferably:

The recording module is further configured to delete the port from the successfully aggregated port group when the port in the port group is successfully aggregated; the notification module is further configured to notify the other nodes in the network of the link aggregation failure information; The update module is further configured to: when the node that receives the link aggregation failure information updates the successful aggregation port group saved by the local node according to the link aggregation failure information.

Preferably:

The node further includes a transmission module, configured to send the service flow from a port recorded in the successfully aggregated port group according to the saved successfully aggregated port group when the service flow is sent through the aggregation link.

The above method will be further described in detail below with reference to specific examples.

Example 1:

Figure 4 is a schematic diagram of link aggregation of a distributed network. Nodes S1 and S3 of network A are interconnected with nodes S2 of network B. For networks A and B, links S1-S2 and S3-S2 are required for aggregation. , so that the forwarding service flow between the networks A and B can be shared on the two links.

Using the above method, the distributed link aggregation is enabled on the nodes S1 and S3, including: Step 401: The node S1 performs link aggregation message transmission through the link S1-S2 and the node S2 to perform link aggregation.

Step 402: After the port 1 of the node S1 is successfully aggregated, the port information is recorded in the successfully aggregated port group, and the link aggregation success information is advertised to other nodes of the network A (S3 in this example);

Step 403: After receiving the link aggregation success information of the node S1, the node S3 adds the port 1 of the node S1 to the successfully aggregated port group.

Step 404: Similarly, the node S3 performs link aggregation information transmission through the link S3-S2 and the node S2 to perform link aggregation.

Step 405: After the port 2 of the node S3 is successfully aggregated, the port information is recorded in the successfully aggregated port group, and the link aggregation success information is advertised to other nodes of the network A (S1 in this example);

Step 406: After receiving the link aggregation success information of the node S3, the node S1 adds the port 2 of the node S3 to the successfully aggregated port group. The order of execution of the above steps 401-403 and steps 404-406 is not limited. For example, steps 404-406 may be performed first, and then steps 401-403 may be performed.

After the nodes S1 and S3 of the network A complete the link aggregation and advertisement, the nodes S1 and S3 record the aggregation successful port information of the local node and other nodes in the network, forming a successful aggregation port group.

When the node S1 detects the failure of the aggregation of the port 1, the port 1 is deleted from the successfully aggregated port group, and then the node S1 advertises the link aggregation failure message to the other nodes in the network A, and the node S3 receives the link aggregation failure of the node S1. After the information, port 1 of node S1 is deleted from the successfully aggregated port group.

When the network A forwards the service flow to the network B through the aggregation link, the node S1 or the node S3 forwards the service flow from a physical port in the successfully aggregated port group according to the characteristics of the service flow, and therefore, based on a certain algorithm, The service flow between the networks A and B can be shared on the physical links of the aggregated link, and the link aggregation method of the distributed network is implemented.

Example two:

FIG. 5 is a schematic diagram of link aggregation of another distributed network. Nodes S1 and S3 of network A are interconnected with nodes S2 and S4 of network B, respectively. For network A, nodes S1, 1, and S3 are required. Ports 3 and 4 are aggregated. For network B, nodes S2, 5, and 6 and ports 7 and 8 of node S4 are required to be aggregated, so that the forwarding service flows between networks A and B can be shared on four links.

Using the above method, in Network A, distributed link aggregation methods are enabled on nodes S1 and S3, including:

Step 501: The node S1 performs link aggregation message transmission through the ports 1, 2, and the node of the network B, and performs link aggregation.

Step 502: After the aggregation of the ports 1 and 2 of the node S1 is successful, the port information is recorded in the active aggregation port group, and the link aggregation success information is advertised to other nodes of the network A (S3 in this example);

Step 503: After receiving the link aggregation success information of the node S1, the node S3 adds the ports 1 and 2 of the node S1 to the successfully aggregated port group.

Step 504, Similarly, the node S3 performs link aggregation through the nodes of the ports 3, 4 and the network B. The transmission of the message, performing link aggregation;

Step 505: After the aggregation of the ports 3 and 4 of the node S3 is successful, the port information is recorded in the active aggregation port group, and the link aggregation success information is advertised to other nodes of the network A (S1 in this example);

Step 506: After receiving the link aggregation success information of the node S3, the node S1 adds the ports 3 and 4 of the node S3 to the successfully aggregated port group.

The order of execution of the above steps 501-503 and steps 504-506 is not limited. For example, steps 504-506 may be performed first, and then steps 501-503 may be performed.

In the same network B, the distributed link aggregation method is also enabled on the nodes S2 and S4. The process is similar to that of the network A. After the link aggregation and advertisement are completed on the nodes S2 and S4, the nodes S2 and S4 record the node. The aggregation successful port information with other nodes forms a successful aggregation port group.

When the network A forwards the service flow to the network B through the aggregation link, the node S1 or the node S3 forwards the service flow from a physical port in the successfully aggregated port group according to the characteristics of the service flow, and therefore, based on a certain algorithm, The service flow forwarded by the network A to the B can be shared on the physical links of the aggregated link, and the link aggregation method of the distributed network is implemented.

Similarly, when the network B forwards the service flow to the network A through the aggregation link, the node S2 or the node S4 forwards the service flow from a physical port in the successful aggregation port group according to the characteristics of the service flow and based on a certain algorithm. Therefore, the service flow forwarded by the network B to the A can be shared on the physical links of the aggregated link, and the link aggregation method of the distributed network is implemented.

In summary, the distributed aggregation link method of the present invention implements a link aggregation technology in a distributed network, facilitates network maintenance and management, increases network bandwidth, and expands application fields of link aggregation technologies, thereby making Distributed networks can also take advantage of the various advantages of link aggregation.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct the associated hardware, such as a read only memory, a magnetic disk, or an optical disk. Optionally, all or part of the steps of the above embodiments may also be used. One or more integrated circuits are implemented. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

It is a matter of course that the invention may be embodied in various other forms and modifications without departing from the spirit and scope of the invention.

Industrial applicability

Using the above methods and nodes, when each link is aggregated, each node advertises successful link aggregation port information to the network. Finally, each node can learn all the successfully aggregated port information in the network and record it as The port group was successfully aggregated. When a network needs to send a service flow to the peer network, the network forwards the service flow from a physical port in the successful aggregation port according to the characteristics of the service flow and based on a certain algorithm, so the service flow between the networks The link aggregation between the two networks is the sum of the aggregated physical ports on the physical ports of the successfully aggregated port group. The embodiment of the present invention implements the link aggregation technology in the distributed network, and expands the chain. The application field of the road aggregation technology enables the distributed network to utilize link aggregation to increase the link bandwidth, which facilitates network maintenance and management.

Claims

Claim

A distributed link aggregation method, comprising:

2. The method of claim 1 wherein

The link aggregation success information includes port information of the successfully aggregated port.

3. The method according to claim 1 or 2, wherein the method further comprises:

A port in the port group is successfully aggregated. The node to which the port belongs deletes the port from the successfully aggregated port group and advertises the link aggregation failure information to other nodes in the network. The node that receives the link aggregation failure information is based on the node. The link aggregation failure information updates the successful aggregation port group saved by the local node.

4. The method of claim 3, wherein

The failure event includes one or more of the following events: port failure, port mode change, port configuration change.

5. The method of claim 1, wherein the method further comprises:

6. A node for implementing distributed link aggregation, comprising an aggregation module, a recording module, a notification module, and an update module, wherein:

The notification module is configured to: advertise the link aggregation success information to other nodes in the network; the update module is configured to: after receiving the link aggregation success information, aggregate according to the link The function information updates the successful aggregation port group saved by this node.

7. The node according to claim 6, wherein

8. The node according to claim 6 or 7, wherein

The recording module is further configured to: when the port in the successfully aggregated port group fails, delete the port from the successfully aggregated port group;

9. The node according to claim 8, wherein

10. The node according to claim 6, wherein

The node further includes a transmission module, configured to: when the service flow is sent through the aggregation link, send the service flow from a port recorded in the successfully aggregated port group according to the saved successful aggregation port group.