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Selective BGP graceful restart in redundant router deployments

A router, redundant technology, used in the field of computer networks

Active Publication Date: 2014-01-22
JUMIPER NETWORKS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, surviving routers do not propagate state changes of failed routers to the network during the graceful restart interval

Method used

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  • Selective BGP graceful restart in redundant router deployments
  • Selective BGP graceful restart in redundant router deployments
  • Selective BGP graceful restart in redundant router deployments

Examples

Experimental program
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Embodiment Construction

[0019] figure 1 is a block diagram illustrating an example communication network 2 in which some network devices selectively invoke graceful restart in accordance with the techniques described herein. exist figure 1 In the example of , the communication network 2 includes an intermediate network 6 (eg, a service provider network) that interconnects computer networks 8-1 to 8-L, collectively referred to as "computer network 8". The designator L may be any number of computer networks 8 supported by the communication network 2 . Computer network 8 is communicatively connected to at least one provider edge router 4 of network 6 . figure 1 is just one example of a communication network 2 and is not meant to be limited to this network.

[0020] exist figure 1In the example of , network 6 includes provider edge routers 4-1 to 4-N collectively referred to as "provider edge (PE) routers 4". Provider edge router 4 may refer to any router coupled to a route cluster. That is, the pr...

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PUM

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Abstract

The invention relates to a selective BGP graceful restart in redundant router deployments. In general, techniques are described for selectively invoking graceful restart procedures when a route reflector member of a redundant route cluster fails. In one example, a method is provided that includes determining, by a provider edge router that supports graceful restart procedures, that a first router forms a redundant group with at least a second router. The method also includes detecting a failure of the first router and determining that at least the second router in the redundant group is operating approximately while the first router is failed. The method further includes overriding graceful restart procedures with respect to the failed first router when at least the second router is operating. The method also includes forwarding one or more data packets according to route information provided via the second router.

Description

technical field [0001] The present invention relates to computer networks, and more particularly, to techniques for reducing recovery periods in the event of network equipment failure. Background technique [0002] A computer network is a collection of interconnected computing devices that exchange data and share resources. In a packet-based network, such as the Internet, computing devices communicate data by dividing the data into small chunks called packets, which are individually routed across the network from a source device to a destination device. The destination device extracts the data from the packets and assembles the data into its original form. Dividing the data into packets enables the source device to resend only those individual packets that may have been lost during transmission. [0003] Certain devices within the network, such as routers, maintain routing information that describes routes through the network. Each route defines a path between two locatio...

Claims

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Application Information

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IPC IPC(8): H04L12/707H04L12/703H04L45/24H04L69/40H04L45/28H04L45/58
CPCH04L45/021H04L45/04H04L45/28H04L45/023H04L69/40H04L41/0668H04L41/0661
Inventor 约翰·加伦·斯卡德罗斯·W·卡隆
Owner JUMIPER NETWORKS INC
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