Method and device for advertising link information

Abstract

The present invention provides a method and device for announcing link information. The method includes: the first device generates a first adjacency relationship type length value NBR TLV and a second NBR TLV, wherein the first NBRTLV carries a first overhead, and the first overhead is the smallest among the multiple parallel links The cost of the link, the second NBR TLV carries a multicast routing identifier and a second overhead, and the multicast routing identifier is used to indicate that the second overhead carried by the second NBR TLV is a multicast link overhead, the first device floods the network with the first NBR TLV carrying the first overhead and the second NBR TLV carrying the multicast routing identifier and the second overhead. The above technical solution can enable the devices participating in the calculation of the multicast path in the network to calculate the cost of the multicast path according to the correct cost of the multicast link between the two adjacent devices, and because the cost of the path with the least cost is kept Flooding, so it will not affect the normal calculation of unicast paths.

Description

technical field [0001] The present invention relates to the field of network communication, and more particularly, to a method and device for announcing link information. Background technique [0002] Transparent Interconnection of Lots of Links (English abbreviation: TRILL) protocol is a routing protocol based on link state calculation on a layer 2 network. It extends the intermediate system to the intermediate system (English abbreviation is Intermediate System to Intermediate System, English abbreviation is ISIS) agreement, this is because ISIS can run directly based on the link layer. The TRILL protocol can realize large-scale two-layer networking, which is suitable for the scenario where the virtual machine (full name in English is called Virtual Machine, abbreviated as VM) migrates within the network segment in the data center market. It has the following advantages over the traditional two-layer technology: [0003] 1. Both unicast and multicast support Equal-Cost M...

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Problems solved by technology

[0016] In this way, when a device participating in route calculation in the network performs multicast path calculation, it will mistakenly regard the cost of the link with the smallest cost between the two devices as the cost of the multicast link between the two devices, resulting in Unable to calculate correct cost for multicast path through said two devices

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