Command Line Reference Guide

Parameters
value Enter a number to assign to routes as the degree of
preference for those routes. When routes are compared, the
higher the degree of preference or local preference value,
the more the route is preferred. The range is 0 to
4294967295. The default is 100.
Defaults 100
Command
Modes
ROUTER BGP
Command
History
Version Description
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
The bgp default local-preference command setting is applied by all routers
within the AS.
bgp enforce-first-as
Disable (or enable) enforce-first-as check for updates received from EBGP peers.
Z9500
Syntax
bgp enforce-first-as
To turn off the default, use the no bgp enforce-first-as command.
Defaults Enabled.
Command
Modes
ROUTER BGP
Command
History
Version Description
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
This is enabled by default, that is for all updates received from EBGP peers, BGP
ensures that the first AS of the first AS segment is always the AS of the peer. If not,
the update is dropped and a counter is incremented. Use the show ip bgp
neighbors
command to view the “failed enforce-first-as check” counter.
If you disable enforce-first-as, you can view it using the show ip protocols
command.
474
Border Gateway Protocol