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Usage
Information
The bgp fast-external-fallover command appears in the show config command output.
bgp four-octet-as-support
Enable 4-byte support for the BGP process.
C-Series, E-Series
Syntax
bgp four-octet-as-support
To disable fast external fallover, use the no bgp four-octet-as-support command.
Defaults Disabled (supports 2-Byte format).
Command Modes ROUTER BGP
Command
History
Version 8.2.1.0 Introduced on the E-Series ExaScale.
Version 7.7.1.0 Introduced
Usage
Information
Routers supporting 4-Byte ASNs advertise that function in the OPEN message. The behavior of a 4-Byte
router is 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.
bgp graceful-restart
Enable graceful restart on a BGP neighbor, a BGP node, or designate a local router to support graceful restart as a receiver only.
C-Series, E-Series
Syntax
bgp graceful-restart [restart-time seconds] [stale-path-time seconds] [role
receiver-only]
To return to the default, use the no bgp graceful-restart command.
Parameters
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 keywords restart-time followed by the maximum number of seconds
needed to restart and bring up all peers. The range is 1 to 3600 seconds. The
default is 120 seconds.
stale-path-time
seconds
Enter the keywords stale-path-time followed by the maximum number of
seconds to wait before restarting a peer’s stale paths. The default is 360 seconds.
role receiver-only Enter the keywords role receiver-only to designate the local router to
support graceful restart as a receiver only.
Defaults As above.
Command Modes ROUTER BGP
430 Border Gateway Protocol