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Alteon OS Application Guide
Chapter 11: Border Gateway Protocol
17542C4911, January 2007
Figure 11-2 Distributing Network Filters in Access Lists and Route Maps
Incoming and Outgoing Route Maps
You can have two types of route maps: incoming and outgoing. A BGP peer router can be con-
figured to support up to eight route maps in the incoming route map list and outgoing route
map list.
If a route map is not configured in the incoming route map list, the router imports all BGP
updates. If a route map is configured in the incoming route map list, the router ignores all
unmatched incoming updates. If you set the action to deny, you must add another route map to
permit all unmatched updates.
Route maps in an outgoing route map list behave similar to route maps in an incoming route
map list. If a route map is not configured in the outgoing route map list, all routes are adver-
tised or permitted. If a route map in the outgoing route map list is set to permit, matched
routes are advertised and unmatched routes are ignored.
Access Lists
(alist)
Network Filter
(nwf)
Route Maps
(rmap)
1
Route Map 1
8
1
8
1
Route Map 2
8
9
16
1
Route Map 32
8
249
256
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