Bgp Enforce-First-As; Bgp Fast-External-Fallover - Dell Force10 Z9000 Reference Manual

Parameters
value
Defaults 100
Command Modes ROUTER BGP
Command History
Version 8.2.1.0
Version 7.4.1.0
Usage The bgp default local-preference command setting is applied by all routers within
Information
the AS.

bgp enforce-first-as

Disable (or enable) enforce-first-as check for udates received from EBGP peers.
C-Series, E-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 8.2.1.0
Version 7.4.1.0
Usage
This is enabled by default, that is for all updates received from EBGP peers, BGP ensures that
Information
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

bgp fast-external-fallover

Enable the fast external fallover feature, which immediately resets the BGP session if a link to a directly connected
external peer fails.
C-Series, E-Series
Syntax bgp fast-external-fallover
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.
Introduced on the E-Series ExaScale.
Introduced
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.
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