BGP: Difference between revisions - Network Security Wiki

Line 119:

=Filter with Route Maps=

Route maps are very powerful filtering tools, they can be used to accomplish the following tasks:

*Route maps are very powerful filtering tools, they can be used to accomplish the following tasks:

Filter on IP prefixes coming from a specific autonomous system

Line 125:

Modify BGP attributes

Match clauses in the BGP route map can be based on the following:

*Match clauses in the BGP route map can be based on the following:

IP network numbers and subnet masks (prefix list or access list)

Line 136:

IGP route type

With a route map, the following can be set:

*With a route map, the following can be set:

Origin

Line 145:

MED

You can apply a route map on incoming or outgoing routing information for a neighbor. ~~The routing information must be permitted by the route map to be accepted. If the route map has no statement explicitly permitting a route, the route is implicitly denied and dropped.~~

*You can apply a route map on incoming or outgoing routing information for a neighbor.

*The routing information must be permitted by the route map to be accepted.

*If the route map has no statement explicitly permitting a route, the route is implicitly denied and dropped.

The syntax required is as follows:

*The syntax required is as follows:

Router(config-router)# neighbor ip-address route-map name in|out