Reference Guide

744 | IPv6 Border Gateway Protocol (IPv6 BGP)
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Usage
Information
Routers supporting 4-Byte ASNs advertise that function in the OPEN message. The behavior of a
4-Byte router will be slightly different depending on whether it is speaking to a 2-Byte router or a
4-Byte router.
When creating Confederations, all the routers in the Confederation must be 4 or 2 byte identified
routers. You cannot mix them.
Where the 2-Byte format is 1-65535, the 4-Byte format is 1-4294967295. Both formats are accepted,
and the advertisements will reflect the entered format.
For more information about using the 2 or 4-Byte format, refer to the FTOS Configuration Guide.
Command
History
bgp graceful-restart
c e
Enable graceful restart on a BGP neighbor, a BGP node, or designate a local router to support graceful
restart as a receiver only.
Syntax
bgp graceful-restart [restart-time seconds] [stale-path-time seconds] [role receiver-only]
To return to the default, enter the no bgp graceful-restart command.
Parameters
Defaults
As above
Command Modes
ROUTER BGP
Command
History
Usage
Information
This feature is advertised to BGP neighbors through a capability advertisement. In receiver only mode,
BGP saves the advertised routes of peers that support this capability when they restart.
Version 8.4.2.1 Introduced on C-Series and S4810.
Version 8.2.1.0 Introduced on E-Series ExaScale
Version 7.4.1.0 Introduced on E-Series TeraScale
neighbor ip-address |
peer-group-name
Enter the keyword neighbor followed by one of the options listed
below:
•
ip-address of the neighbor in IP address format of the neighbor
•
peer-group-name of the neighbor peer group.
restart-time seconds Enter the keyword restart-time followed by the maximum number of
seconds needed to restart and bring up all peers.
Range: 1 to 3600 seconds
Default: 120 seconds
stale-path-time seconds Enter the keyword stale-path-time followed by the maximum
number of seconds to wait before restarting a peer’s stale paths.
Default: 360 seconds.
role receiver-only Enter the keyword role receiver-only to designate the local router to
support graceful restart as a receiver only.
Version 8.4.2.1 Introduced on C-Series and S4810.
Version 8.2.1.0 Introduced on E-Series ExaScale
Version 7.4.1.0 Introduced on E-Series TeraScale