Incoming And Outgoing Route Maps; Precedence - IBM RackSwitch G8000 Application Manual

Incoming and Outgoing Route Maps

Precedence

248
RackSwitch G8000: Application Guide
Figure 23. Distributing Network Filters in Access Lists and Route Maps
Route Maps
(rmap)
Access Lists
Route Map 1
Route Map 2
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Route Map 32
You can have two types of route maps: incoming and outgoing. A BGP peer router
can be configured 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 advertised 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.
You can set a priority to a route map by specifying a precedence value with the
following command (Route Map mode):
RS G8000(config)# route-map <map number>(Select a route map)
RS G8000(config-route-map)#
RS G8000(config-route-map)# exit
The smaller the value the higher the precedence. If two route maps have the same
precedence value, the smaller number has higher precedence.
Network Filter
(nwf)
(alist)
1 1
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8 8
1 9
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8 16
1 249
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8 256
precedence <1-255>
(Specify a precedence)