Method and device for dynamically calculating delay required for switching paths of link aggregation group

Abstract

The invention discloses a method and a device for dynamically calculating delay required for switching paths of a link aggregation group. The method comprises: a central control unit regularly initiating path delay search to each switch, obtaining path delay time required by each switch to reach other switches through respective different link group members, and storing all the path delay time; and when the switch switches the packet flows on different link group members, searching the corresponding path delay time from the central control unit, and setting the required delay according to thesearched path delay time. According to the scheme, the problem of packet rearrangement caused by fixed delay adopted for path switching of the link aggregation group in the prior art is solved, and the path delay error obtained according to actual detection of the current environment is adopted, so that the problem of packet rearrangement does not exist, and the network transmission efficiency isnot greatly reduced due to path switching.

Description

technical field [0001] The invention relates to the field of switching paths of link aggregation groups of switches, in particular to a method and device for dynamically calculating the delay required for switching paths of link aggregation groups. Background technique [0002] Link aggregation (Port Channel), refers to the aggregation of multiple physical ports together to form a logical port, in order to achieve the load balance of outbound / incoming traffic throughput among member ports. The member port from which the packet is sent to the peer switch. Such as figure 1 As shown, after setting four ports to join the link aggregation, the bandwidth of the link aggregation can be increased to 400GB. [0003] Such as figure 2 As shown, when the objects of the aggregated links are different switches, there is a great chance of packet timing errors during path switching, because the delays of different paths are different, which leads to the abnormal sequence of packets arri...

AI Technical Summary

Problems solved by technology

[0007] The fixed delay value of the existing technology cannot adapt to various network conditions. If the delay is too small, packet reordering will still occur. If the delay is too large, the destination host has not received the next packet for too long and will cause timeout retransmission. Therefore, the fixed delay value is not The best solution to this problem

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