Administrator Guide

neighbor update-source
Enable the software to use Loopback interfaces for TCP connections for BGP sessions.
C9000 Series
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
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 disable all routers within the peer group.
loopback
interface
Enter the keyword loopback followed by a number of the loopback interface. The
range is 0 to 16383.
Defaults Not configured.
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
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.
neighbor weight
Assign a weight to the neighbor connection, which is used to determine the best path.
C9000 Series
Syntax
neighbor {ipv6-address | peer-group-name} weight weight
To remove a weight value, use the no neighbor {ipv6-address | peer-group-name}
weight weight 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 disable all routers within the peer group.
weight Enter a number as the weight. The range is 0 to 65535. The default is 0.
Defaults 0
Command Modes ROUTER BGP
Border Gateway Protocol 479