Reference Guide

IPv6 Border Gateway Protocol (IPv6 BGP) | 775
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
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.
Parameters
Defaults
Not configured.
Command Modes
ROUTER BGP
Command
History
Usage
Information
Loopback interfaces are up constantly and the BGP session may need one interface constantly up to
stabilize the session. The neighbor update-source command is not necessary for directly connected
internal BGP sessions.
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 to disable all routers within the peer
group.
loopback interface Enter the keyword loopback followed by a number of the loopback
interface.
Range: 0 to 16383.
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