Dell Force10 S55T S55 Configuration Guide FTOS 8.3.5.3 - Page 172
Command Syntax, Command Mode, Usage, Purpose, FTOS Command Line Interface Reference
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www.dell.com | support.dell.com • Advertise to all BGP neighbors and peer-groups that the forwarding state of all routes has been saved. This prompts all peers to continue saving the routes they receive from your E-Series and to continue forwarding traffic. • Bring the secondary RPM online as the primary and re-open sessions with all peers operating in "no shutdown" mode. • Defer best path selection for a certain amount of time. This helps optimize path selection and results in fewer updates being sent out. Enable graceful restart using the configure router bgp graceful-restart command. The table below shows the command and its available options: Command Syntax Command Mode Usage bgp graceful-restart bgp graceful-restart [restart-time time-in-seconds] CONFIG-ROUTERBGP CONFIG-ROUTERBGP Enable graceful restart for the BGP node. Set maximum restart time for all peers. Default is 120 seconds. bgp graceful-restart [stale-path-time time-in-seconds] bgp graceful-restart [role receiver-only] CONFIG-ROUTERBGP CONFIG-ROUTERBGP Set maximum time to retain the restarting peer's stale paths. Default is 360 seconds. Local router supports graceful restart as a receiver only. BGP 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, FTOS enables the receiving/restarting mode by default. In receiver-only mode, graceful restart saves the advertised routes of peers that support this capability when they restart. However, the E-Series does not advertise that it saves these forwarding states when it restarts. This option provides support for remote peers for 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, please see the following table or the FTOS Command Line Interface Reference. Command Syntax neighbor {ip-address | peer-group-name} graceful-restart neighbor {ip-address | peer-group-name} graceful-restart [restart-time time-in-seconds] neighbor {ip-address | peer-group-name} graceful-restart [role receiver-only] neighbor {ip-address | peer-group-name} graceful-restart [stale-path-time time-in-seconds] Command Mode CONFIG-ROUTERBGP CONFIG-ROUTERBGP Purpose Add graceful restart to a BGP neighbor or peer-group. Set maximum restart time for the neighbor or peer-group. Default is 120 seconds. CONFIG-ROUTER- Local router supports graceful restart for this BGP neighbor or peer-group as a receiver only. CONFIG-ROUTERBGP Set maximum time to retain the restarting neighbor's or peer-group's stale paths. Default is 360 seconds. 172 | Border Gateway Protocol IPv4 (BGPv4)