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Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter26 Defining Route Maps
Customizing a Route Map
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Check the Match IP Address check box to enable or disable the Match address of a route or
match packet.
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Check the Match Next Hop check box to enable or disable the Match next hop address of a
route.
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Check the Match Route Source check box to enable or disable the Match advertising source
address of the route.
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Choose Access List ot Prefix List from the drop-down list to match the IP address.
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According to the previous selection, click the ellipses to display the Browse Access List or
Browse Prefix List dialog box.
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Choose the ACL or prefix list that you want.
•Check the Match metric of route check box to enable or disable matching the metric of a route.
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In the Metric Value field, type the metric values. You can enter multiple values, separated by
commas. This setting allows you to match any routes that have a specified metric. The metric
value can range from 0 to 4294967295.
•Check the Match Route Type check box to enable or disable matching of the route type. Valid route
types are External1, External2, Internal, Local, NSSA-External1, and NSSA-External2. When
enabled, you can choose more than one route type from the list.
•Click OK when you are done.
Configuring Prefix Lists
ABR type 3 LSA filtering extends the capability of an ABR that is running OSPF to filter type 3 LSAs
between different OSPF areas. Once a prefix list is configured, only the specified prefixes are sent from
one OSPF area to another OSPF area. All other prefixes are restricted to their OSPF area. You can apply
this type of area filtering to traffic going into or coming out of an OSPF area, or to both the incoming
and outgoing traffic for that area.
When multiple entries of a prefix list match a given prefix, the entry with the lowest sequence number
is used. For efficiency, you may want to put the most common matches or denials near the top of the list
by manually assigning them a lower sequence number. By default, sequence numbers are automatically
generated in increments of 5, beginning with 5.
To add prefix lists, perform the following steps:
Step1 In ASDM, choose Configuration > Device Setup > Routing > Prefix Rules.
Step2 From the Add drop-down list, choose Add Prefix List.
The Add Prefix List dialog box appears.
Step3 Enter the prefix name and description, then click OK.