Load sharing method and device

Abstract

The invention provides a load sharing method applied to a home-terminal switch of a link aggregation group. The load sharing method comprises the steps that link aggregation symmetry groups are established, and physical member ports are added into the link aggregation symmetry groups, wherein traffics between the physical member ports are mutually isolated; a main port is selected from the physical member ports, and an ARP message sent by a home-terminal host is broadcast to an opposite-terminal IRF device through the main port; the ARP message or an ARP response message of an opposite-terminal host is received, MAC address learning of the opposite-terminal host is independently performed through the physical member ports receiving the ARP message or the ARP response message, and the message is forwarded based on a learned MAC address. According to the load sharing method, the symmetry of the traffic of the same session for using physical links in an uplink and a downlink is guaranteed, invalid forwarding of the traffic of the same session in the IRF device is avoided, the forwarding efficiency of the device is enhanced, and meanwhile overheads of system MAC resources of the IRF device are lowered.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to a load sharing method and device. Background technique [0002] With the development of cloud computing, the data center network gradually tends to be flat, and the gateway is often installed at the core layer of the network to facilitate the migration of virtual machines; at the same time, IRF (Intelligent Resilient For a large number of applications in the center, distributed aggregation is often used between the IRF device and the uplink device to load balance the data and perform link backup at the same time. For distributed aggregation, due to various reasons such as the load sharing algorithm and connection sequence at both ends of the aggregation link, the session traffic carried by the aggregation link is often distributed on different physical links in the uplink and downlink. . [0003] For example, see figure 1 ,when figure 1 When the upstream host P...

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Problems solved by technology

[0003] For example, see figure 1 ,when figure 1 When the upstream host PC1 communicates with the downstream host PC2, the links calculated by the uplink device and the downlink device in the link aggregation group may be different according to the load sharing algorithm. As a result, the packets sent from PC1 to PC2 pass through slot 4 on the IRF device. Invalid forwarding by member devices four times, and when the message is forwarded by the IRF device, the member devices of each hop need to learn the MAC address of the message, which increases the overhead of system MAC resources

[0004] In addition, when the IRF device is a traditional distributed device, there are similar problems

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