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Defaults Enabled.
Command Modes ROUTER BGP
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
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.
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
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
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 from 1 to 65535, the 4-Byte format is from 1 to 4294967295. Both formats
are accepted, and the advertisements reflect the entered format.
For more information about using the 2- or 4-Byte format, refer to the Dell Networking OS 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.
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
neighbor ip-
address | peer-
group-name
Enter the keyword neighbor then one of the options:
● 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 then the maximum number of seconds
needed to restart and bring up all peers. The range is from 1 to 3600 seconds.
The default is 120 seconds.
stale-path-time
seconds
Enter the keywords stale-path-time then the maximum number of seconds to
wait before restarting a peer’s stale paths. The default is 360 seconds.
610 IPv6 Border Gateway Protocol (IPv6 BGP)