Cisco Cisco IOS Software Release 12.0(3)S
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BGP Enforce the First Autonomous System Path
The BGP Enforce the First Autonomous System Path feature is used to configure a Border Gateway
Protocol (BGP) routing process to discard updates received from an external BGP (eBGP) peers that do
not list their autonomous system (AS) number as the first AS path segment in the AS_PATH attribute of
the incoming route.
Protocol (BGP) routing process to discard updates received from an external BGP (eBGP) peers that do
not list their autonomous system (AS) number as the first AS path segment in the AS_PATH attribute of
the incoming route.
Feature History for BGP Enforce the First Autonomous System Path feature
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Contents
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Release
Modification
12.0(3)S This
feature was introduced.
12.0(26)S
The default behavior for this feature was changed to enabled in Cisco IOS
Release 12.0(26)S.
Release 12.0(26)S.
12.2(18)S
This feature was integrated into Cisco IOS Release 12.2(18)S.
12.3(2)
This feature was integrated into Cisco IOS Release 12.3(2).
12.3(2)T
This feature was integrated into Cisco IOS Release 12.3(2)T.