Dell S6100, Руководство по настройке

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bgp enforce-first-as
Disable (or enable) enforce-first-as check for updates received from EBGP peers.
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
This guide is platform-specific. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide .
Version Description
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
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.
7.7.1.0 Introduced on the C-Series.
7.4.1.0 Introduced.
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.
In the event of an enfore-first-as check failure, the existing BGP session is flapped.
Related Commands
• show ip bgp neighbors — view the information the BGP neighbors exchange.
• show ip protocols — view information on routing protocols.
354 Border Gateway Protocol