Administrator Guide

neighbor fall-over
Enable or disable fast fall-over for BGP neighbors.
C9000 Series
Syntax
neighbor {ipv4-address | peer-group-name} fall-over
To disable, use the no neighbor {ipv4-address | peer-group-name} fall-over command.
Parameters
ipv4-address Enter the IP address of the neighbor in dotted decimal format.
peer-group-name Enter the name of the peer group.
Defaults Disabled.
Command Modes ROUTER BGP
Command History
This guide is platform-specific. 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 Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
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.
7.4.1.0 Introduced
Usage Information When you enable failover, BGP keeps track of IP or IPv6 ability to reach the peer remote address and the peer
local address. Whenever either address becomes unreachable (for example, no active route exists in the routing
table for the peer IP or IPv6 destination/local address), BGP brings down the session with the peer.
Related
Commands
show ip bgp neighbors — displays information on the BGP neighbors.
neighbor filter-list
Configure a BGP filter based on the AS-PATH attribute.
C9000 Series
Syntax
neighbor {ip-address | peer-group-name} filter-list as-path-name {in | out}
To delete a BGP filter, use the no neighbor {ip-address | peer-group-name} filter-list as-
path-name {in | out} command.
Parameters
ip-address Enter the IP address of the neighbor in dotted decimal format.
peer-group-name Enter the name of the peer group to apply the filter to all routers in the peer group.
as-path-name
Enter the name of an established AS-PATH access list (up to 140 characters).
If the AS-PATH access list is not configured, the default is permit (allow routes).
in Enter the keyword in to filter inbound BGP routes.
Border Gateway Protocol 355