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8.8

Need help with Cisco Routing

Asked by brianleighton in Miscellaneous Networking, Networking Hardware Firewalls

Tags: 3745, cisco

Here's the situation that I want to be able to route. This is not normal and I don't know if Cisco can bypass the internal path that is created.

Got a Cisco 3745 with IOS 12.3. It has 2 ethernet ports (Eth0 and Eth1) and 8 T1's that are bundled into one big multilink ppp pipe (Multilink1). We are in a test lab environment and the setup is as follows:

192.168.100.0/24 is connected to Eth0. Eth0 is 192.168.100.1.
192.168.300.0/24 is connected to Eth1. Eth1 is 192.168.300.1.
192.168.200.0/24 is connected to Multilink1. Multilink1 is 192.168.200.1 on the Cisco end, 192.168.200.2 on the other end of the MLPPP link. Any data that is sent out the Multilink1 interface is looped back verbatim to Multilink1 by our test equipment on the other end of the link.

So here's the problem: We want to send traffic from the 192.168.100.0/24 subnet on Eth0 to the 192.168.300.0/24 subnet on Eth1. BUT, and here's the kicker, we want the traffic to first go out the Multilink1 path, get looped back by our test equipment back into Multilink1, and then get routed out Eth1. The IP src/dest cannot change along the way.

Ideally, we'd like to have this sort of routing:

1. Send in IP traffic into Eth0 with source of 192.168.100.0/24 and destination of 192.168.200.0/24 and have it routed out Multilink1.
2. (Remember that any data that is sent out Multilink1 is looped back verbatim to the Multilink1.)
3. Looped back traffic with source of 192.168.100.0/24 and destination of 192.168.200.0/24 packets coming into the Cisco Multilink1 get routed out Eth2.






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[+][-]03/01/05 10:17 AM, ID: 13431863Accepted Solution

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Zones: Miscellaneous Networking, Networking Hardware Firewalls
Tags: 3745, cisco
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Solution Provided By: JFrederick29
Participating Experts: 2
Solution Grade: A
 
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