Reference Guide

330 | Border Gateway Protocol IPv4 (BGPv4)
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Defaults
Disabled.
Command Modes
ROUTER BGP
Usage
Information
To prevent loops, the neighbor ebgp-multihop command will not install default routes of the
multihop peer. Networks not directly connected are not considered valid for best path
selection.
Command
History
neighbor fall-over
c e s
Enable or disable fast fall-over for BGP neighbors.
Syntax
neighbor {ipv4-address | peer-group-name} fall-over
To disable, use the no neighbor {ipv4-address | peer-group-name} fall-over command.
Parameters
Defaults
Disabled
Command Modes
ROUTER BGP
Usage
Information
When fall-over is enabled, BGP keeps track of IP or IPv6 reachability to the peer remote
address and the peer local address. Whenever either address becomes unreachable (i.e, no
active route exists in the routing table for peer IP or IPv6 destination/local address), BGP
brings down the session with the peer.
Related
Commands
Command
History
neighbor filter-list
c e s
Configure a BGP filter based on the AS-PATH attribute.
Version 8.3.7.0 Introduced on the S4810.
Version 7.8.1.0 Introduced support on S-Series
Version 7.7.1.0 Introduced support on C-Series
ipv4-address
Enter the IP address of the neighbor in dotted decimal format.
peer-group-name
Enter the name of the peer group.
show ip bgp neighbors Display information on the BGP neighbors
Version 8.3.7.0 Introduced on the S4810.
Version 7.8.1.0 Introduced support on S-Series
Version 7.7.1.0 Introduced support on C-Series
Version 7.4.1.0 Introduced