08-06-2009 04:52 AM - edited 03-06-2019 07:07 AM
I am trying to clear something up, I have an interface that has both an access-list and a route-map. If the traffic matches to an ACE will it then be processed by the route-map or does it bypass the route-map? I am trying to understand what the order is that traffic gets evaluated on an interface.
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08-06-2009 05:00 AM
Chris
If we had more detail about your situation we could understand it better and could give better advice. Without knowing any details I would assume that the route map on the interface is for Policy Based Routing. And it would help to know whether the access list was applied inbound or outboud. Assuming that it is applied inbound then if the input packet is permitted by the access list then it would be processed by the route map for PBR.
If you would provide config details of the interface config and the access list and the route map, then we could know whether my assumptions are correct or not and might provide better advice.
HTH
Rick
08-06-2009 05:00 AM
Chris
If we had more detail about your situation we could understand it better and could give better advice. Without knowing any details I would assume that the route map on the interface is for Policy Based Routing. And it would help to know whether the access list was applied inbound or outboud. Assuming that it is applied inbound then if the input packet is permitted by the access list then it would be processed by the route map for PBR.
If you would provide config details of the interface config and the access list and the route map, then we could know whether my assumptions are correct or not and might provide better advice.
HTH
Rick
08-06-2009 05:08 AM
You are right on both of your assumptions, the route map is for policy routing and the acl is applied inbound.
interface Vlanxxx
ip address 10.1.1.1 255.255.255.0
ip access-group INBOUND in
ip access-group OUTBOUND out
ip policy route-map map
Is there any cisco documentation on this?
08-06-2009 05:16 AM
Chris,
Usually I refer this document for determining order of operation for various features. Although it is documented for NAT, it has considered all the features that could be applied on the interface.
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080133ddd.shtml
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