The default is 120 seconds.• Set maximum time to retain the restarting peer’s stale paths.CONFIG-ROUTER-BGP modebgp graceful-restart [stale-path-time time-in-seconds]The default is 360 seconds.• Local router supports graceful restart as a receiver only.CONFIG-ROUTER-BGP modebgp graceful-restart [role receiver-only]Enabling Neighbor Graceful RestartBGP graceful restart is active only when the neighbor becomes established. Otherwise, it is disabled.Graceful-restart applies to all neighbors with established adjacency.With the graceful restart feature, Dell Networking OS enables the receiving/restarting mode by default. In Receiver-Only mode, gracefulrestart saves the advertised routes of peers that support this capability when they restart. This option provides support for remote peersfor their graceful restart without supporting the feature itself.You can implement BGP graceful restart either by neighbor or by BGP peer-group. For more information, refer to the Dell Networking OSCommand Line Interface Reference Guide.• Add graceful restart to a BGP neighbor or peer-group.CONFIG-ROUTER-BGP modeneighbor {ip-address | peer-group-name} graceful-restart• Set the maximum restart time for the neighbor or peer-group.CONFIG-ROUTER-BGP modeneighbor {ip-address | peer-group-name} graceful-restart [restart-time time-in-seconds]The default is 120 seconds.• Local router supports graceful restart for this neighbor or peer-group as a receiver only.CONFIG-ROUTER-BGP modeneighbor {ip-address | peer-group-name} graceful-restart [role receiver-only]• Set the maximum time to retain the restarting neighbor’s or peer-group’s stale paths.CONFIG-ROUTER-BGP modeneighbor {ip-address | peer-group-name} graceful-restart [stale-path-time time-in-seconds]The default is 360 seconds.Filtering on an AS-Path AttributeYou can use the BGP attribute, AS_PATH, to manipulate routing policies.The AS_PATH attribute contains a sequence of AS numbers representing the route’s path. As the route traverses an AS, the ASN isprepended to the route. You can manipulate routes based on their AS_PATH to affect interdomain routing. By identifying certain ASN in theAS_PATH, you can permit or deny routes based on the number in its AS_PATH.AS-PATH ACLs use regular expressions to search AS_PATH values. AS-PATH ACLs have an “implicit deny.” This means that routes that donot meet a deny or match filter are dropped.204 Border Gateway Protocol IPv4 (BGPv4)
