Administrator Guide
To disable fast external failover, use the no bgp four-octet-as-support command.
Defaults Disabled (supports 2–byte format)
Command Modes ROUTER BGP
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
EMC Networking OS Command Line Reference Guide.
Version Description
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000–ON.
9.2(1.0) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
7.8.1.0 Introduced on the S-Series.
7.7.1.0 Introduced on the C-Series.
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 EMC Networking OS
Configuration Guide.
This command automatically restarts the BGP instance for the configuration to take effect.
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
Border Gateway Protocol 357