Route information processing method and packet switching equipment

Abstract

The embodiment of the invention discloses a route information processing method. The route information processing method includes the steps of obtaining a preset frame table and an initial unicast forwarding list of each stage of switching unit; determining whether non-symmetry exists between an upper-level switching unit and a lower-level switching unit and between the switching units and a target switching accessing unit according to the preset frame table and the initial unicast forwarding list of each stage of switching unit; if non-symmetry exists, updating the initial unicast forwarding list of the switching unit corresponding the non-symmetry according to preset strategy; and changing the route information from at least one link of the switching unit with updated initial unicast forwarding list to the target switching accessing unit into unreachable information from reachable information. The embodiment of the invention further discloses packet switching equipment.

Description

technical field [0001] The invention relates to packet data exchange technology in the communication field, in particular to a routing information processing method and packet switching equipment. Background technique [0002] The switching system is a key component of the packet switching equipment. The switching system is composed of a switching access device and a switching network. The switching access device is composed of a source switching access device and a destination switching access device. The switching network is It is composed of various exchange units connected to each other. Between the source switching access device and the switching unit, between the switching unit and the switching unit, and between the switching unit and the destination switching access device are all connected through serial high-speed links. [0003] In the switching network, each switching unit is connected to each other, and can be divided into a single-level switching network struc...

AI Technical Summary

Problems solved by technology

[0004] However, between two adjacent levels of the switching network, there is a situation of bandwidth inconsistency, that is, the link bandwidth between nodes at any level and all nodes at another level is inconsistent

Among them, the three-level CLOS asymmetric switching network structure is as follows: figure 2 As shown, the input and output bandwidths of the first-level switching units and the second-level switching units on the service chassis and the central chassis are consistent (that is, have asymmetry), but the third-level switching units on the business chassis 3 Level switching unit 2#, its input bandwidth is greater than the output bandwidth, wherein the dotted line indicates that the bandwidth is lower, so, in the case of sufficient input traffic, the third level switching unit 2# on the service chassis 3 will localized congestion

When local congestion occurs in one or more switching units in the switching network, its cell switching speed will lag behind that of other switching units, which will eventually lead to a decline in the flow of the entire switching network. When the degree of congestion is severe, it may cause packet loss. reduced performance

The traditional processing method is to reduce the local congestion by reducing the authorization of the destination switching access device, but this method not only has a slow response speed, but also cannot fundamentally solve the problem of system packet loss.

Images