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A method and system for specifying a distribution tree

A technology of distribution tree and tree root, applied in the field of communication, can solve the problems of inconsistent TRILL distribution tree selection and reverse path check information, and achieve the effect of facilitating forwarding and avoiding too large

Active Publication Date: 2017-04-05
ZTE CORP
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  • Abstract
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Problems solved by technology

[0010] In view of this, the main purpose of the present invention is to provide a method and system for specifying a distribution tree to solve the problem of inconsistency between TRILL distribution tree selection and reverse path inspection information

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  • A method and system for specifying a distribution tree
  • A method and system for specifying a distribution tree
  • A method and system for specifying a distribution tree

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Embodiment Construction

[0043] In practical applications, when Rbridge finds that it does not specify a distribution tree or the specified distribution tree is wrong, it updates the distribution tree it expects to use to: the distribution tree that is included in the list of k distribution trees and whose root is closest to itself; k is the number of distribution trees that all Rbridges need to calculate in the TRILL network where the Rbridge is located;

[0044]After that, Rbridge can refresh its own LSP in the network according to the updated distribution tree.

[0045] For example, after knowing the k distribution trees that all Rbridges in the network need to calculate, if a certain Rbridge (such as RB2) finds that the distribution tree specified by itself is wrong (the specified distribution tree is not in or not completely in the k distribution trees) or When no distribution tree is specified, the distribution tree expected to be used in the LSP is updated to: j distribution trees (up to the mi...

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Abstract

The invention discloses a method and system for specifying a distribution tree. When Rbridge finds that it does not specify a distribution tree or that the specified distribution tree is wrong, it updates the distribution tree it expects to use to: the one contained in the list of k distribution trees distribution tree; said k is the number of distribution trees that all Rbridges need to calculate in the TRILL network where Rbridge is located; Rbridge refreshes its own LSP in the network according to the updated distribution tree. The technology of specifying the distribution tree in the present invention makes the distribution tree used when the Rbridge forwards consistent with the control information on other Rbridges by optimizing the notification process of the distribution tree expected to be used by the local Rbridge itself.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for specifying a distribution tree. Background technique [0002] Transparent Interconnection over Lots of Links (TRILL) is a connection layer (L2) network standard recommended by IETF (Internet Engineering Task Force), which is used to solve STP (Spanning Tree protocol, Spanning Tree Protocol) in large data centers. lack of. In an L2 network, STP avoids loops by blocking redundant links (Link), but at the same time it also causes a waste of redundant link bandwidth. TRILL solves the L2 loop problem by introducing the IS-IS (Intermediate System to Intermediate System) routing protocol into the L2 network, while retaining the L2 multipath. The L2 multipath may also be called ECMP (Equivalent Cost Multiple Path, equivalent cost multipath). [0003] In a TRILL network, a device running the TRILL protocol is called a routing bridge (Rbridge, RB), and the Rbridge uses ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/753H04L12/705H04L45/18
Inventor 吕二春翟洪军成明江赵静静
Owner ZTE CORP
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