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neighbor ebgp-multihop
Attempt and accept BGP connections to external peers on networks that are not directly connected.
Syntax
neighbor {ip-address | peer-group-name} ebgp-multihop [ttl]
To disallow and disconnect connections, use the no neighbor {ip-address | peer-group-
name} ebgp-multihop 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.
ttl (OPTIONAL) Enter the number of hops as the Time to Live (ttl) value. The range is
from 1 to 255. The default is 255.
Defaults Disabled.
Command Modes ROUTER BGP
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage
Information
To prevent loops, the neighbor ebgp-multihop command does not install the default routes of the
multihop peer. Networks not directly connected are not considered valid for best-path selection.
neighbor fall-over
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
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
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
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.
288 Border Gateway Protocol IPv4 (BGPv4)