Reference Guide

764 | IPv6 Border Gateway Protocol (IPv6 BGP)
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Parameters
Defaults
Disabled.
Command Modes
ROUTER BGP
Command
History
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.
neighbor fall-over
c e
Enable or disable fast fall-over for BGP neighbors.
Syntax
neighbor {ipv6-address | peer-group-name} fall-over
To disable, use the no neighbor {ipv6-address | peer-group-name} fall-over command.
Parameters
Defaults
Disabled
Command Modes
ROUTER BGP
Command
History
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
ipv6-address Enter the IPv6 address in the x:x:x:x::x format.
The
:: notation specifies successive hexadecimal fields of zeros.
peer-group-name
Enter the name of the peer group.
ttl
(OPTIONAL) Enter the number of hops as the Time to Live (ttl) value.
Range: 1 to 255.
Default: 255
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
ipv6-address Enter the IPv6 address in the x:x:x:x::x format.
The
:: notation specifies successive hexadecimal fields of zeros.
peer-group-name
Enter the name of the peer group.
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
show ip bgp ipv6 unicast
neighbors
Display IPv6 routing information exchanged by BGP neighbors.