Configuring An As Path List; Defining The Routes That A Router Can Advertise - HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual

To deny a community from the list, enter this command from the community
list configuration mode context:
Syntax: deny [internet | local-as | no-advertise | no-export | <1-42949672957>]
Again, you can enter multiple keywords in the same command.

Configuring an AS Path List

You can use an AS path list to select routes for a policy according to values in
the routes' AS fields.
You create the AS path list from the global configuration mode context. Enter
this command:
Syntax: ip as-path-list <listname>
You then move to the AS path-list configuration mode context. For example:
ProCurve(config)# ip as-path-list CustomerA
ProCurve(config-as-path-list)#
You can then enter this command to select or deny a specific AS path:
Syntax: [permit | deny] <string of AS numbers>
For example:
ProCurve(config-as-path-list)# permit 1 2
If you want to filter traffic only according to AS path, and if you do not need
to apply attributes to filtered routes, then you can apply the AS path list
directly to a neighbor. Move to the BGP neighbor configuration mode context
and enter:
Syntax: as-path-list <listname> [in | out]

Defining the Routes that a Router Can Advertise

You can control whether the BGP interface advertises a route to a neighbor
according to the route's:
network address and prefix length
AS path
community
metric
IP Routing—Configuring RIP, OSPF, BGP, and PBR
Configuring BGP
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