ISIS (intermediate system to intermediate system) protocol LSP (Link-State Packet) flooding and synchronization method
A protocol and flooding technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as redundant flooding and synchronization, occupation, large network bandwidth, etc., to eliminate network load and adverse effects, and save processing resource effect
Inactive Publication Date: 2015-04-08
ANHUI WANTONG POSTS & TELECOMM CO LTD
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However, this will cause some problems. A large number of LSPs are flooded and synchronized on these parallel links: a large amount of network bandwidth is occupied; due to the flooding and synchronization of a large number of LSPs, the processing resources of the IS equipment are occupied, resulting in interface neighbors The link is broken, which will cause interruption to routing and network traffic; to ensure the synchronization of the two IS (Intermediate System) LSPs that establish parallel links, each LSP will be flooded and synchronized on each link of the parallel link , causing a lot of redundant flooding and synchronization
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[0020] A kind of ISIS protocol LSP flooding and synchronous method, among the parallel links of at least one pair of neighbors set up between the intermediate system IS, select one of them link as the channel of LSP flooding and synchronous between two intermediate system IS, Other parallel links are in the suppression state of LSP flooding and synchronization.
[0021] Selecting one of the links as a channel for LSP flooding and synchronization between two ISs,
[0022] If there are broadcast links and point-to-point links among the parallel links establishing neighbors between two ISs, the point-to-point links are preferentially selected for LSP flooding and synchronization;
[0023] If there is at least one point-to-point link among the parallel links that establish neighbors between two ISs, the point-to-point link with the largest extended interface ID is preferentially selected for LSP flooding and synchronization;
[0024] If there is at least one broadcast link among ...
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The invention relates to ISIS routing protocol running network devices and discloses an ISIS protocol LSP flooding and synchronization method. The method includes the steps of selecting one of at least one pair of neighbored parallel links established between intermediate systems (IS) as an LSP flooding and synchronization channel of two intermediate systems (IS), and setting other parallel links in an LSP flooding and synchronization suppression state. The ISIS protocol LSP flooding and synchronization method removes redundant flooding and synchronization of LSPs on the parallel links of the ISIS protocol, thereby eliminating the network load and adverse effects due to the flooding and synchronization on the parallel links of a large number of the LSPs and saving processing resources of a device.
Description
technical field [0001] The invention relates to a network device running an ISIS (intermediate system to intermediate system) routing protocol, in particular to an ISIS protocol LSP flooding and synchronization method. Background technique [0002] The intermediate system to intermediate system routing protocol (ISIS) is a dynamic, link state-based interior gateway protocol (IGP). The link state protocol data packet (LSP) describes the link state information of the intermediate system (IS), and sends it to the network, and also stores the LSP sent by all intermediate system (IS) devices on the network topology to form the link state Database (LSDB), ISIS uses the link state database (LSDB) to calculate the best route to the destination address through the shortest path first algorithm (SPF). On the network, any intermediate system (IS) will send the LSP generated by itself through all outgoing interfaces with neighbors, and after receiving the LSP from one interface, send i...
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IPC IPC(8): H04L12/707H04L29/06H04L45/24
Inventor 周能强蒋子剑何鹏陈培磊张弓
Owner ANHUI WANTONG POSTS & TELECOMM CO LTD