Cisco Catalyst 3750 - Filtering Routing Information

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Catalyst 3750 Metro Switch Software Configuration Guide
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Chapter 28 Configuring IP Unicast Routing
Configuring Protocol-Independent Features
Use the no route-map map-tag global configuration command or the no match or no set route-map
configuration commands to delete an entry. Use the no ip policy route-map map-tag interface
configuration command to disable PBR on an interface. Use the no ip route-cache policy interface
configuration command to disable fast-switching PBR. Use the no ip local policy route-map map-tag
global configuration command to disable policy-based routing on packets originating on the switch.
Filtering Routing Information
You can filter routing protocol information by performing the tasks described in this section.
Note When routes are redistributed between OSPF processes, no OSPF metrics are preserved.
Step 3
match ip address {access-list-number |
access-list-name} [...access-list-number
| ...access-list-name]
Match the source and destination IP address that is permitted by one or
more standard or extended access lists.
If you do not specify a match command, the route map applies to all
packets.
Step 4
set ip next-hop ip-address
[...ip-address]
Specify the action to take on the packets that match the criteria. Set next
hop to which to route the packet (the next hop must be adjacent).
Step 5
exit Return to global configuration mode.
Step 6
interface interface-id Enter interface configuration mode, and specify the interface to
configure.
Step 7
ip policy route-map map-tag Enable PBR on a Layer 3 interface, and identify the route map to use. You
can configure only one route map on an interface. However, you can have
multiple route map entries with different sequence numbers. These
entries are evaluated in sequence number order until the first match. If
there is no match, packets are routed as usual.
Step 8
ip route-cache policy (Optional) Enable fast-switching PBR. You must first enable PBR before
enabling fast-switching PBR.
Step 9
exit Return to global configuration mode.
Step 10
ip local policy route-map map-tag (Optional) Enable local PBR to perform policy-based routing on packets
originating at the switch. This applies to packets generated by the switch
and not to incoming packets.
Step 11
end Return to privileged EXEC mode.
Step 12
show route-map [map-name] (Optional) Display all route maps configured or only the one specified to
verify configuration.
Step 13
show ip policy (Optional) Display policy route maps attached to interfaces.
Step 14
show ip local policy (Optional) Display whether or not local policy routing is enabled and, if
so, the route map being used.
Step 15
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose