Usage
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.
If you disable the
enforce-first-as
command, it can be viewed using the
show
ip protocols
command.
Related
Commands
show ip bgp neighbors
— views the information the BGP neighbors exchange.
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.
Z9500
Syntax
bgp fast-external-fallover
To disable fast external fallover, use the
no bgp fast-external-fallover
command.
Defaults
Enabled
Command
Modes
ROUTER BGP
Command
History
This guide is platform-specific. For command information about other platforms,
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
9.2(1.0)
Introduced on the Z9500.
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.
7.7.1.0
Introduced on the C-Series.
Usage
Information
The
bgp fast-external-fallover
command appears in the
show config
command output.
378
Border Gateway Protocol