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

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 8.2.1.0 Introduced on the E-Series ExaScale.
Version 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 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 Introduced on the E-Series ExaScale.
Version 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.
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
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