Juniper BGP - CONFIGURATION GUIDE V 11.1.X Configuration Manual page 166

JUNOSe 11.1.x BGP and MPLS Configuration Guide
bgp graceful-restart path-selection-defer-time-limit
bgp graceful-restart restart-time
bgp graceful-restart stalepaths-time
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Selecting the Best Path
Use to enable the BGP graceful restart capability.
Advertisement of the graceful restart capability is disabled by default.
The no neighbor capability negotiation command prevents the advertisement
of all BGP capabilities, including graceful restart, to the specified peers.
This command takes effect immediately and automatically bounces the session.
Example
host1(config-router)#bgp graceful-restart
Use the no version to disable advertisement of the graceful restart capability.
Use the default version to restore the default condition, of not advertising this
capability.
See bgp graceful-restart.
Use to set the maximum time a restarted BGP speaker defers reinitiating the
best-path selection process.
This command takes effect immediately and automatically bounces the session.
Example
host1(config-router)#bgp graceful-restart path-selection-defer-time-limit 180
Use the no version to restore the default value, 120 seconds.
See bgp graceful-restart path-selection-defer-time-limit.
Use to set the time BGP advertises to all peers within which it expects to
reestablish a session after restarting. Peers flush stale routes from the speaker
if the session is not restarted within this period.
Specify an interval shorter than the stalepaths time.
This command takes effect immediately and automatically bounces the session.
Example
host1(config-router)#bgp graceful-restart restart-time 240
Use the no version to restore the default value, 120 seconds.
See bgp graceful-restart restart-time.
Use to set the maximum time BGP waits to receive an End-of-RIB marker from
any restarted peer before flushing all remaining stale routes from that peer. The
timer begins when BGP recognizes that the peer session has gone down.
This command prevents an excessive delay in BGP reconvergence due to a peer
that brings a session back up but is slow to send fresh routes.