Service Manual

bgp default local-preference
Change the default local preference value for routes exchanged between internal BGP peers.
Syntax
bgp default local-preference value
To return to the default value, use the no bgp default local-preference command.
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 from 0 to 4294967295. The default is 100.
Defaults 100
Command Modes ROUTER BGP
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information
All routers apply the bgp default local-preference command setting within the AS. To set the local
preference for a specific route, use the set local-preference command in ROUTE-MAP mode.
Related Commands set metric — assigns a local preference value for a specific route.
bgp enforce-first-as
Disable (or enable) enforce-first-as check for updates received from EBGP peers.
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
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information
This command 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 increments.
To view the “failed enforce-first-as check” counter, use the show ip bgp neighbors command.
If you disable the enforce-first-as command, it can be viewed using the show ip protocols command.
Related Commands
show ip bgp neighbors — views the information the BGP neighbors exchange.
286 Border Gateway Protocol IPv4 (BGPv4)