Command Line Reference Guide

338 | Border Gateway Protocol IPv4 (BGPv4)
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Defaults
keepalive = 60 seconds; holdtime = 180 seconds.
Command Modes
ROUTER BGP
Usage
Information
Timer values configured with the neighbor timers command override the timer values configured with
the any other 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.
Command
History
neighbor update-source
c e s
Enable the E-Series software to use Loopback interfaces for TCP connections for BGP sessions.
Syntax
neighbor {ip-address | peer-group-name} update-source interface
To use the closest interface, use the no neighbor {ip-address | peer-group-name} update-source
interface command.
Parameters
Defaults
Not configured.
Command Modes
ROUTER BGP
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.
Command
History
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 7.8.1.0 Introduced support on S-Series
Version 7.7.1.0 Introduced support on C-Series
ip-address
Enter the IP address of the peer router in dotted decimal format.
peer-group-name
Enter the name of the peer group to disable all routers within the peer group.
interface Enter the keyword loopback followed by a number of the loopback interface.
Range: 0 to 16383.
Version 7.8.1.0 Introduced support on S-Series
Version 7.7.1.0 Introduced support on C-Series