Dell C9000 series, Reference Manual

Page: 571 / 2286

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.
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 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 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
• show ip bgp neighbors – views the information exchanged by BGP neighbors.
• show ip protocols – views information on routing protocols.
Border Gateway Protocol 571