Routing with multiple interfaces

Unanswered Question
Aug 20th, 2007

I have 3 customers using an 11503 with 6 interfaces. To maximize the throughput for each customer I want to separate the customers to their own interface. Each customer would get a client side and server side interface. From a load balancing perspective I believe this will work because the flow (src IP,Port, Interface & dst IP,Port,Interface) will match the client with the correct server response. My concern is when a server initiates a connection to another device and has to go through the CSS. I would like to have the customer's server use the corresponding client side iterface when initiating traffic. This way each customer gets a gigabit connection for themselves. I'm running 8.1 and it allows me to add multiple default routes but I don't see a way of having the CSS separate this traffic for each customer interface without specific static routes. Are specific static routes for each customer the only solution?

Thank you.

I have this problem too.
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Gilles Dufour Tue, 08/21/2007 - 01:59

What you want is called virtualization.

this is one of the great features of the new loadbalancer - ACE.

With the CSS, you can still achieve what you want.

You have to create a service for each customer/vlan gateway.

Use a type transparent-cache to avoid nating.

Then, create an acl like this :

acl 1

clause 10 permit any destination any prefer


clause 99 permit any any destination any


Create an acl like above for each server vlan and specify the appropriate gateway/service.

This will tell the CSS to prefer this gateway for traffic matching the in the acl.


t.doherty Tue, 08/21/2007 - 06:10

Thanks Gilles. What should be in the service besides the type? Should the IP address be the gateway for the interface I want to send the traffic?


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