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Achieving method and device of ceaseless routing after routing protocol restarting

A routing protocol and routing technology, applied in the field of network communication, can solve problems such as not enough to complete a complete restart of the device, and achieve the effect of improving reliability

Active Publication Date: 2014-05-28
NEW H3C TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under such strict reliability requirements, the maximum interruption time allowed by network equipment within a year is usually no more than 5 minutes. Such a short time may not be enough to complete a complete restart of the equipment.

Method used

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  • Achieving method and device of ceaseless routing after routing protocol restarting
  • Achieving method and device of ceaseless routing after routing protocol restarting
  • Achieving method and device of ceaseless routing after routing protocol restarting

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Embodiment Construction

[0019] With the development of technology, network devices generally adopt the method of separating the control plane and the forwarding plane. Generally, the main control board is responsible for the control plane and runs various control modules, including running routing protocols to calculate routing information; the line card is responsible for the forwarding plane, including data forwarding based on routing information. In this way, when the software control module on the main control board restarts, it may not affect the data forwarding on the line card.

[0020] In the existing technology, based on the separation of the control plane and the forwarding plane, there are two solutions that can keep the forwarding without interruption even when the routing protocol is restarted, namely, NSR (NonStop Routing, non-stop routing) and GR (Graceful Restart). , graceful restart).

[0021] The implementation of NSR requires two main control boards, the active main control board ...

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Abstract

The invention provides an achieving method of ceaseless routing after routing protocol restarting. The method is used on network equipment where a routing protocol is operated. The method comprises the steps that neighbor data and a routing state information abstract are stored during routing protocol operation; if the routing protocol is restarted, neighbor relation over time is amplified, and current routing information is stored for packet transmitting; after routing protocol restarting is completed, according to the stored neighbor data and the stored routing state information abstract, routing state information synchronization with a neighbor according to the routing protocol is carried out; and according to routing state information after synchronization, routing information is updated. According to the technical scheme, transmitting service cannot be stopped under the situation of routing protocol restarting through single main control board network equipment, and no extra requirements on neighbor equipment exist.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method and device for realizing uninterrupted routing after a routing protocol is restarted. Background technique [0002] The emergence and development of new network services such as voice and video have put forward higher requirements for network reliability. These services are very sensitive to traffic interruptions. For traditional network maintenance and upgrades, even if redundancy has been implemented for network deployment, due to protocol resets, link oscillations, and device restarts caused by software version upgrades, Both will have a certain impact on packet loss on online services. [0003] Especially for network devices running routing protocols in the backbone network, due to the high importance of business functions, they need to meet reliability standards exceeding 99.99%. Under such strict reliability requirements, the maximum interruption ti...

Claims

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Application Information

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IPC IPC(8): H04L12/703H04L45/28
Inventor 晁军显林长望
Owner NEW H3C TECH CO LTD
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