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Methods and network elements operable to specify and determine complete sets of link state messages for link state routing protocols

A link status message and network element technology, applied in the field of networking, can solve the problem of lack of underlying datagram segmentation mechanism

Active Publication Date: 2014-03-26
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, IS-IS operates directly on the data link layer and currently lacks the underlying datagram fragmentation mechanism

Method used

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  • Methods and network elements operable to specify and determine complete sets of link state messages for link state routing protocols
  • Methods and network elements operable to specify and determine complete sets of link state messages for link state routing protocols
  • Methods and network elements operable to specify and determine complete sets of link state messages for link state routing protocols

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Embodiment Construction

[0032] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention, such as specific routing protocols, specific types of messages, specific types of information elements, specific modules, specific partitioning and configuration of groups of modules and a specific sequence of operations. It is understood, however, that these specific details may not be needed to practice the embodiments of the invention. In other instances, well-known circuits, structures, complete software instruction sequences and techniques have not been shown in detail in order not to obscure the understanding of this description. With the included description, those skilled in the art will be able to implement appropriate functionality without undue experimentation.

[0033] image 3 is to show that the receiving router performs a shortest path first calculation prematurely after receiving the first refresh or update LSP 206R1...

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Abstract

A method, performed by a transmitter network element utilizing a link state routing protocol which has a maximum link state message size. The method is for providing information to avoid a disruption in data forwarding that would result from a receiver network element performing preferred route computations based on an incomplete set of link state messages. The method includes generating a complete set of link state messages having information indicating that the link state messages are the complete set of the link state messages. The complete set of the link state messages are collectively coherent with a link state of the transmitter network element. The method also includes transmitting the complete set of the link state messages, and the information indicating that the link state messages are the complete set of the link state messages, to a network. Also disclosed are transmitter network elements, receiver network elements, and methods thereof.

Description

[0001] Related Application Cross Reference [0002] This application claims priority to US Provisional Patent Application 61 / 510,175, filed July 21, 2011, which is incorporated herein by reference. technical field [0003] Embodiments of the present invention relate to the field of networking, and more specifically, link state routing protocols. Background technique [0004] Intermediate System-to-Intermediate System (IS-IS) is a link-state routing protocol described in ISO 10589, second edition, published November 15, 2002 and republished in RFC 1142. The IS-IS protocol operates natively at the Open Systems Interconnection (OSI) model network layer. IS-IS is an interior gateway protocol generally used for routing within an administrative domain or network, as opposed to an exterior gateway protocol generally used for routing between autonomous systems. [0005] According to IS-IS, each IS-IS router is to operate as an originating router and to transmit link state advertis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/757
CPCH04L45/023
Inventor 陆文虎田纪宁
Owner TELEFON AB LM ERICSSON (PUBL)