Bgp Enforce-First-As - Dell C9000 Series Reference Manual

Version
9.2(1.0)
8.2.1.0
7.4.1.0
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.
C9000 Series
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
9.9(0.0)
9.2(1.0)
8.2.1.0
7.4.1.0
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.
Related
Commands
Description
Introduced on the Z9500.
Introduced on the E-Series ExaScale.
Introduced
Description
Introduced on the C9010.
Introduced on the Z9500.
Introduced on the E-Series ExaScale.
Introduced
• show ip bgp neighbors
• show ip protocols – views information on routing protocols.
– views the information exchanged by BGP neighbors.
Border Gateway Protocol 571