Local forwarding system for cross-device link aggregation

Abstract

The invention discloses a local forwarding system for cross-device link aggregation, which belongs to the technical field of link aggregation, and comprises a local forwarding system establishment stage and a local forwarding stage, and is characterized in that in the local forwarding system establishment stage, a VP mapping table is firstly established; then, the message sent by the host reachesany VAL device to carry out local learning; redirection processing is performed on the message after local learning, the message is redirectioned to an INT port, and the message is sent to an oppositeterminal; and then learning is carried out based on a VP port converted from a VLAN ID field in the VAL TAG, and after the forwarding table entry is synchronously learned, forwarding messages arriving at any VAL device subsequently are forwarded through local table look-up. The method is simple in software processing logic, easy to develop, short in period, low in requirement for platforms and resources, low in influence and free of software maintenance of MAC address forwarding tables, packaging / de-packaging and other operations.

Description

technical field [0001] The invention belongs to the technical field of link aggregation, in particular to a local forwarding system for inter-device link aggregation. Background technique [0002] Link aggregation technology aggregates multiple links into one logical link to expand bandwidth. Theoretically, the aggregated bandwidth is the sum of the bandwidth of each link participating in the aggregation. While link aggregation improves bandwidth, it also provides link backup function, that is, when one of the physical links fails, the traffic on this link can be automatically redistributed to other physical links of the same aggregated link. [0003] Such as figure 1 As shown, the peer device of the link aggregation must be a single device. When the device where the aggregation port is located fails, the entire aggregation link cannot continue to work. With the development of the data center network, in the forwarding network at the access layer, in order to increase the ...

AI Technical Summary

Problems solved by technology

[0025] 1. The software processing logic is complex, including the maintenance of address entries, the collection of synchronization entries, the encapsulation and decapsulation of synchronous messages, and a large amount of processing, which makes development difficult and takes a long time;

[0026] 2. The software synchronization delay is large, the response speed to the topology change is slow, and the traffic recovery time is long when the topology changes;

[0027] 3. In the application scenario of a large number of MAC address forwarding entries, the resource consumption caused by synchronizing a large number of forwarding entries is large, the demand for CPU and memory is large, and the platform is highly dependent;

[0028] 4. The overhead of link switching is high, and the recovery time of traffic forwarding is long, including refreshing the forwarding port during single link failover or device failover, etc.

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