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Policy Based Routing on Catalyst 6500

Unanswered Question
Jun 21st, 2012
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I have a problem with Policy Based Routing on a Cisco Catalyst 6500 with IOS ipservicesk9-mz.122-33.SXH2a.

I try to redirect traffic, and only that traffic, for machines with private ip address ( to the port TCP/1111

of a server 195.x.x.1 in public ip. The principle is: my machines emit traffic bound for the port

tcp/1111 to 195.x.x.1 , the PBR on the 6500 router intercepts traffic which sends it on a Linux NAT ( that translate through his second interface (public) on the destination server (195.x.x.1). The NAT server can not be made ​​from 6500 but from a different machine for other reasons. The Policy Based Routing (ip policy route-map) is applied on a vlan interface, I also experimented with on a physical interface without further success.

The Linux NAT server is working properly.

Here, the Policy Based Routing (route-map) is not working. Here is the conf:

! Creation of the road-map

TST-route-map PBR permit 10

! Filtering machines

match ip address ACL-TST

! Address assignment redirect traffic (NAT server)

set ip next-hop

6500 # show ip access-list ACL-TST

Extended IP access list ACL-TST

     10 permit tcp host 195.x.x.1 eq 1111

Have you an idea where it comes from? if you need more informations, please feel free to ask me;-)

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soroushm Thu, 06/21/2012 - 09:29
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do you mean that your designated traffic is sent to the NAT machine by the 6500. but it doesnt reach further to 195.x.x.1?


NetAdm DSIUPMF Thu, 06/21/2012 - 13:24
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Hello soroushm,

Thank, no traffic is redirected from 6500 to the NAT server. I enabled the log on my ACL-TST and a tcpdump on the interface of my NAT server, no redirected traffic is visible. I feel that this route-map doesn't work. I also have another road-map on 6500 (route redistribution) is not working also, do you think the two might be related?

soroushm Thu, 06/21/2012 - 13:47
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let this PBR be as it is. looks fine to me.

Try setting a static ARP entry for your next hop value  ( in your switch (find out mac address and do it), see if it works.

plz Rate if it helped,


NetAdm DSIUPMF Fri, 06/22/2012 - 00:07
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Hi Soroush,

Good idea ... I just tried but without success. The NAT server does not receive traffic redirexted by the 6500 PBR . I think I have a problem with my road-map, but which one?

A precision: the entire rest of the networks managed by this 6500 router is working properly.


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