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DES-7200 Configuration Guide Chapter 6 BGP
Configuration
6-31
You can modify this value by the bgp update-delay command.
StalePath Timer: Time the GR Helper needs to wait before receiving the EOR
label from the GR Restarter after reestablishing the connection with the GR
Restarter. During this period, the GT Helper keeps the route of the GR Restarter
valid. It will delete the rotue tagged with Stale after receiving the EOR lable or the
StalePath timer is expired. You can modify this value by the bgp graceful-restart
stalepath-time command.
6.20.2 Implementation of BGP GR
Implementation of BGP GR is not an independent process. All BGP peers are
necessary to enable BGP GR capability for normal operation. Failed GR may
cause temporary route black hole or loop and affect the network operation.
Consequently, it is recommended to ensure the GR capability is negotiatied
successfully by the show ip bgp neighbors command.
To enable BGP GR, exeucte the bgp graceful-restart command in the BGP
route configuration mode.
6.20.3 Configuring BGP GR Capability
BGP GR capability is an extended capability of the BGP protocol, which is
disabled by default. When enabling GR, the BGP reestablishes the connection
with its neighbor and negotiates GR capability. The GR is enabled only when both
sides support GR capability.
To enable the GR capability, execute the following commands:
Command Function
DES-7200 # configure terminal Enter the global configuration mode.
DES-7200(config)# router bgp 500
Enter the BGP configuration mode.
DES-7200(config-router)# bgp
graceful-restart
Enable GR.
DES-7200(config-router)# end
Exit to the privileged mode.
DES-7200 # show running-config Show the configuration.
DES-7200 # write
(Optional) Save the configuration.
All the products supporting BGP support this command.