DELL 9.8(0.0) User Manual
Version
Description
7.4.1.0
Introduced.
Usage
Information
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. Use the show ip
bgp neighbors command to view the “failed enforce-first-as check” counter.
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. Use the show ip
bgp neighbors command to view the “failed enforce-first-as check” counter.
If you disable the enforce-first-as command, it can be viewed using the show
ip protocols command.
ip protocols command.
In the event of an enfore-first-as check failure, the existing BGP session is flapped.
Related
Commands
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.
S4820T
Syntax
bgp fast-external-fallover
To disable fast external fallover, use the no bgp fast-external-fallover
command.
To disable fast external fallover, use the no bgp fast-external-fallover
command.
Defaults
Enabled
Command
Modes
Modes
ROUTER BGP
Command
History
History
This guide is platform-specific. For command information about other platforms,
refer to the relevant Dell Networking OS Command Line Reference Guide.
refer to the relevant Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version
Description
9.7(0.0)
Introduced on the S6000–ON.
9.0.2.0
Introduced on the S6000.
8.3.19.0
Introduced on the S4820T.
8.3.11.1
Introduced on the Z9000.
8.3.7.0
Introduced on the S4810.
7.8.1.0
Introduced on the S-Series.
420
Border Gateway Protocol