• Author : Srinivasan

 
 

BGP Long Lived Graceful Restart

Description The BGP graceful restart mechanism has a limitation that the graceful restart time cannot exceed 4095 seconds per the IETF standard (RFC 4724). There are scenarios where this limitation poses a challenge in various  deployments, which need to allow the graceful restart process to complete over a longer period of time. This feature provides support for restarting BGP speakers that can take a long time to recover and complete the graceful restart procedures. The mechanism adopted is documented in the draft “Support for Long-lived BGP Graceful Restart” (draft-ietf-idr-long-lived-gr-00). Please note that only the “receiving speaker” or “helper” procedures are...
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BGP Override Graceful Restart Time

Description The BGP graceful restart mechanism has a limitation that the graceful restart time cannot exceed 4095 seconds as per the IETF standard (RFC 4724). On a restarting speaker, Arista’s CLI configuration currently allows only up to 3600 seconds. There are scenarios where this limitation poses a challenge in certain customer deployments, and a need is felt for increasing the restart time to a very high value. This feature provides a way of configuring the restart time to be considered by a graceful restart helper, overriding the value sent by the peer in the graceful restart capability. Using this feature,...
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BGP best paths and best ECMP paths counters

Description It is often useful to know on a per AFI/SAFI basis, the number of paths that have been selected from a peer as best paths. For example, we may have configured a policy to ensure that paths from a particular peer are most preferred, and it would be useful to have a quick way of confirming this. Similarly, we may need to divert traffic away from a peer, and we may use a policy to reduce the preference of paths received from the peer to accomplish this. This feature provides an easy way to know the number of paths/prefixes...
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