Reference Guide

IPv6 Border Gateway Protocol (IPv6 BGP) | 805
Command
History
bgp fast-external-fallover
c e
Enable the fast external fallover feature, which immediately resets the BGP session if
a link to a directly connected external peer fails.
Syntax
bgp fast-external-fallover
To disable fast external fallover, enter no bgp fast-external-fallover.
Defaults
Enabled
Command Modes
ROUTER BGP
Command
History
Usage
Information
The bgp fast-external-fallover command appears in the show config command
output.
bgp four-octet-as-support
c e
Enable 4-byte support for the BGP process
Syntax
bgp four-octet-as-support
To disable fast external fallover, enter no bgp four-octet-as-support.
Defaults
Disabled (supports 2-Byte format)
Command Modes
ROUTER BGP
Usage
Information
Routers supporting 4-Byte ASNs advertise that function in the OPEN message. The
behavior of a 4-Byte router will be 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.
Version 8.3.19.0 Introduced on S4820T
Version 8.4.2.1 Introduced on C-Series and S4810
Version 8.2.1.0 Introduced on E-Series ExaScale
Version 7.4.1.0 Introduced on E-Series TeraScale
Version 8.3.19.0 Introduced on S4820T
Version 8.4.2.1 Introduced on C-Series and S4810
Version 8.2.1.0 Introduced on E-Series ExaScale
Version 7.4.1.0 Introduced on E-Series TeraScale