URGENT - 1841 dual WAN interf routing config issue

Unanswered Question
Nov 16th, 2008

I have attached the confg from my 1841 router. Previously had 1 WAN connection on FA0/1. I have added a WIC-1ADSL module and believe it to be up & running as Dialer0.

Now what I would like to do is take all Citrix traffic (port 1494) and route it inbound & outbound through the Dialer0 interface which has an IP of 67.41.95.91. Inside Citrix server device is 10.2.1.4.

How do I setup routing exclusively for port 1494 traffic to allow inbound on Dialer0 and then make sure when Citrix server (10.2.1.4) responds that traffic goes outbound through Dialer0?

I have this problem too.
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tcordier Mon, 11/17/2008 - 08:26

You can use Policy Based Routing (PBR) for this. The standard configuration would be similar to this:

1) Define an ACL for Citrix traffic:

access-list 101 permit tcp any any eq 1492

(you can enhance this with your specific IP addresses instead of "any").

2) Define a route-map:

route-map Policy_Citrix permit 10

match ip address 101

set ip next-hop dialer0 f0/1

route-map Policy_Citrix permit 20

(this will send the Citrix traffic to dialer0, and if dialer0 is unavailable, to f0/1)

3) Define policy routing on your LAN interface (where the Citrix traffic originates:

ip policy route-map Policy_Citrix

You can also add more intelligence to PBR by tracking the reachability of certain IP routes (see http://www.cisco.com/en/US/products/ps6599/products_white_paper09186a00800a4409.shtml).

This will only redirect inbound (from your remote LAN to the Citrix server) traffic. You need a similar PBR configuration on the router which routes the traffic from the Citrix server back to the remote LAN.

HTH, Thomas

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