Command Line Reference Guide

742 | IPv6 Border Gateway Protocol (IPv6 BGP)
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neighbor timers
c e s
Set keepalive and hold time timers for a BGP neighbor or a peer group.
Syntax
neighbor {ipv6-address | peer-group-name} timers keepalive holdtime
To return to the default values, use the no neighbor {ipv6-address | peer-group-name} timers
command.
Parameters
Defaults
keepalive = 60 seconds; holdtime = 180 seconds.
Command Modes
ROUTER BGP
Command
History
Usage
Information
Timer values configured with the neighbor timers command override the timer values configured with
the timers bgp command.
When two neighbors, configured with different keepalive and holdtime values, negotiate for new
values, the resulting values will be as follows:
• the lower of the holdtime values is the new holdtime value, and
• whichever is the lower value: one-third of the new holdtime value, or the configured keepalive
value is the new keepalive value.
neighbor update-source
c e s
Enable the E-Series software to use Loopback interfaces for TCP connections for BGP sessions.
Syntax
neighbor {ipv6-address | peer-group-name} update-source loopback interface
To use the closest interface, use the no neighbor {ipv6-address | peer-group-name} update-source
loopback interface command.
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 to set the timers for all routers within the peer group.
keepalive
Enter a number for the time interval, in seconds, between keepalive messages sent to
the neighbor routers.
Range: 1 to 65535
Default: 60 seconds
holdtime
Enter a number for the time interval, in seconds, between the last keepalive message
and declaring the router dead.
Range: 3 to 65535
Default: 180 seconds
Version 8.4.2.1 Introduced on C-Series and S-Series.
Version 8.2.1.0 Introduced on E-Series ExaScale
Version 7.4.1.0 Introduced on E-Series TeraScale