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bgp four-octet-as-support
Enable 4-byte support for the BGP process.
Syntax
bgp four-octet-as-support
To disable fast external failover, 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 byte 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 byte or 4-byte format, refer to the Dell Networking OS
Configuration Guide.
bgp graceful-restart
To support graceful restart as a receiver only, enable graceful restart on a BGP neighbor, a BGP node, or designate a local
router.
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
restart-time
seconds
Enter the keyword restart-time then the maximum number of seconds to
restart and bring-up all the peers. The range is from 1 to 3600 seconds. The default
is 120 seconds.
stale-path-time
seconds
Enter the keyword stale-path-time then the maximum number of seconds to
wait before restarting a peer’s stale paths. The default is 360 seconds.
role receiver-only Enter the keyword role receiver-only to designate the local router to
support graceful restart as a receiver only.
Defaults as above
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
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.
272 Border Gateway Protocol IPv4 (BGPv4)