Administrator Guide

The neighbor shutdown command terminates all BGP sessions on the BGP neighbor or BGP peer
group. Use this command with caution as it terminates the specified BGP sessions. When a neighbor or
peer group is shutdown, use the show ip bgp summary command to confirm its status.
Related
Commands
● show ip bgp summary – displays the current BGP configuration.
● show ip bgp neighbors – displays the current BGP neighbors.
neighbor timers
Set keepalive and hold time timers for a BGP neighbor or a peer group.
C9000 Series
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
ipv6-address Enter the IPv6 address in the x:x:x:x::x format.
NOTE: 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. The range is 1 to 65535. The default is 60 seconds.
holdtime Enter a number for the time interval, in seconds, between the last keepalive
message and declaring the router dead. The range is 3 to 65535. The default is 180
seconds.
Defaults
● keepalive = 60 seconds
● holdtime = 180 seconds
Command Modes ROUTER BGP
Command
History
Version Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
8.2.1.0 Introduced on the E-Series ExaScale.
7.4.1.0 Introduced
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 are 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.
478 Border Gateway Protocol