Cisco 3032 Software Configuration Manual page 1023

Chapter 38 Configuring IP Unicast Routing
a criterion must be matched. The set command specifies an action to be taken if the routing update meets
the conditions defined by the match command. Although redistribution is a protocol-independent
feature, some of the match and set route-map configuration commands are specific to a particular
protocol.
One or more match commands and one or more set commands follow a route-map command. If there
are no match commands, everything matches. If there are no set commands, only the match action
occurs. Therefore, you need at least one match or set command.
A route map with no set route-map configuration commands is sent to the CPU, which causes high CPU
Note
utilization.
You can also identify route-map statements as permit or deny. If the statement is marked as a deny, the
packets meeting the match criteria are sent back through the normal forwarding channels
(destination-based routing). If the statement is marked as a permit, set clauses are applied to packets
meeting the match criteria. Packets that do not meet the match criteria are forwarded through the normal
routing channel.
You can use the BGP route map continue clause to execute additional entries in a route map after an
entry is executed with successful match and set clauses. You can use the continue clause to configure
and organize more modular policy definitions so that specific policy configurations are not repeated
within the same route map. The switch supports the continue clause for outbound policies. For more
information about using the route map continue clause, see the BGP Route-Map Continue Support for
an Outbound Policy feature guide for Cisco IOS Release 12.4(4)T at this URL:
http://www.cisco.com/en/US/products/ps6441/products_feature_guides_list.html
Although each of Steps 3 through 14 in the following section is optional, you must enter at least one
Note
match route-map configuration command and one set route-map configuration command.
Beginning in privileged EXEC mode, follow these steps to configure a route map for redistribution:
Command
Step 1 configure terminal
Step 2 route-map map-tag [permit | deny] [sequence number] Define any route maps used to control redistribution, and
Step 3 match as-path path-list-number
Step 4 match community-list community-list-number [exact]
OL-12247-04
Purpose
Enter global configuration mode.
enter route-map configuration mode.
map-tag—A meaningful name for the route map. The
redistribute router configuration command uses this
name to reference this route map. Multiple route maps
can share the same map tag name.
[permit | deny] (Optional)—If permit is specified and
the match criteria are met for this route map, the route is
redistributed as controlled by the set actions. If deny is
specified, the route is not redistributed.
sequence number (Optional)—Number that defines the
position a new route map is to have in the list of route
maps already configured with the same name.
Match a BGP autonomous-system path access list.
Match a BGP community list.
Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
Configuring Protocol-Independent Features
38-97