Dell PowerSwitch S4112F-ON EMC SmartFabric OS10 User Guide Release 10.5.1 - Page 674
fast-external-fallover, graceful-restart, Example, Supported, Releases, Syntax, Parameters, Default
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Example Supported Releases enable fall-over, BGP tracks IP reachability to the peer remote address and the peer local address. Whenever either address becomes unreachable - no active route exists in the routing table for peer IPv6 destinations or local address - BGP brings down the session with the peer. The no version of this command disables fall-over. OS10(conf-router-neighbor)# fall-over 10.3.0E or later fast-external-fallover Resets BGP sessions immediately when a link to a directly connected external peer fails. Syntax Parameters Default Command Mode Usage Information fast-external-fallover None Not configured ROUTER-BGP Fast external fall-over terminates the EBGP session immediately after the IP unreachability or link failure is detected. This only applies after you manually reset all existing BGP sessions. For the configuration to take effect, use the clear ip bgp command. The no version of this command disables fast external fallover. NOTE: To configure these settings for a non default VRF instance, you must first enter the ROUTER-CONFIG-VRF sub mode using the following commands: 1. Enter the ROUTER BGP mode using the router bgp as-number command. 2. From the ROUTER BGP mode, enter the ROUTER BGP VRF mode using the vrf vrf-name command. Example OS10(conf-router-bgp-10)# fast-external-fallover Supported Releases 10.3.0E or later graceful-restart Enables graceful or hitless restart and configures the required parameters for the restart process. Syntax Parameters graceful-restart role receiver-only ● role - Sets the restart role of the local router ● receiver-only - Local router supports graceful restart as a receiver only Defaults Command Mode Usage Information Disabled ROUTER BGP When you enable graceful restart on a node, its BGP neighbor acts as a helper by not dropping the sessions and maintaining the route information so that the traffic is not disturbed. The no version of this command disables graceful-restart helper mode. NOTE: To configure these settings for a non-default VRF instance, you must first enter ROUTERCONFIG-VRF sub mode using the following commands: 1. Enter the ROUTER BGP mode using the router bgp as-number command. 2. From the ROUTER BGP mode, enter the ROUTER BGP VRF mode using the vrf vrf-name command. 674 Layer 3
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