route maps cannot filter BGP update on the inbound

[gauravprakash]

One restriction on route maps is that when used for filtering BGP updates (described later in the module) rather than when redistributing between protocols, you cannot filter on the inbound when using a "match" on the IP address. Filtering on the outbound is OK.

Please explain. Why it cannot be aplied Inbound.????

[pkhatri]

That is not correct. You can certainly filter inbound using route-maps. Where are your reading this ?

Paresh.

[thisisshanky]

Route filtering in BGP is typically done using Prefixlists or Distribute-list, Route maps are generally used for modifying updates and not really filter prefixes. But I guess, you could definitely match the prefixes on an access-list (prefix-list also) and then have a route-map instance that is a "deny" and apply that route-map to a neighbor command inbound.