Load balancing method and device

Abstract

The invention proposes a load balancing method and device which are applied to NPV switches. The method includes the steps that when load balancing operation needs to be performed, an upstream and downstream interface mapping table which is established in advance is traversed, and according to a load sharing strategy, the mapping table item for which corresponding traffic needs to be regulated to a newly-added upstream interface or an upstream interface with the minimum load currently is determined; the forwarding priority of the determined mapping table item is reduced, a load balancing routing table item with the destination FC address same as the mapping table item and an outgoing interface being the newly-added upstream interface or the upstream interface with the minimum load currently is issued in a fiber channel routing table, and the corresponding relation between the LB routing table item and the mapping table item is saved; the forwarding priority of the LB routing table item is higher than the forwarding priority of the mapping table item after being reduced. With the method and device, load balancing of upstream interfaces can be achieved under the condition that service is continuous.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to a load balancing method and device. Background technique [0002] In FC (Fiber Channel, Fiber Channel) SAN (Storage Area Network, Storage Area Network), the two sides of the communication are usually a network server at one end and a disk device at the other end. Servers and disk devices can be directly connected through optical fibers or copper cables, or indirectly connected through switches. [0003] In the switching architecture, servers and disk devices are called node devices (Node), which are entities for sending and receiving data; FC switches serve as intermediate transmission devices to provide data forwarding and network control functions. The switched architecture provides good scalability and can support the interconnection of tens of thousands or even more node devices. [0004] See figure 1 and figure 2 , the network composed of FC switches and ...

AI Technical Summary

Problems solved by technology

Because when remapping, the NPV switch will initialize the links of all downlink ports, requiring all node devices connected to the downlink ports to re-register, which will cause traffic interruption

Therefore, when a new uplink port takes effect, if the user wants to remap the uplink and downlink ports to achieve a better load balancing effect, the remapping can be triggered through the command line. However, at this time, link initialization will be performed on all downlink ports. , causing business interruption

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