Users Guide

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
Command History
This guide is platform-specic. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.4.2.1 Introduced on the C-Series and S4810.
Version 8.2.1.0 Introduced on the E-Series ExaScale.
Version 7.4.1.0 Introduced on the E-Series TeraScale.
Usage Information
Routers supporting 4-Byte ASNs advertise that function in the OPEN message. The behavior of a 4-Byte
router is slightly dierent 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 identied 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 reect the entered format.
For more information about using the 2- or 4-Byte format, refer to the Dell Networking OS Conguration
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
IPv6 Border Gateway Protocol (IPv6 BGP)
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