passing ipx with gre

[mjsully]

where can I find some documentation on how to setup cisco routers to use GRE to encapsulate IPX in order to pass through a pix firewall? I need to have a remote site with IPX needs to attach to headquarters. The traffic will be passing through a PIX 515. I was hoping it could be tunneled with GRE, but I can't find any good docs on the Cisco site for setting this up.

[Richard Burts]

I am not clear whether you are asking for documentation about how to set up GRE or about how to send IPX over the GRE. It is not so difficult.

To set up GRE you define the tunnel with interface tunnel . After that there are a number of commands that you could use, but there are only two that are required: you must define tunnel source and you must define tunnel destination. There are some subtlties about which interfaces to use as source and destination, but the main requirement is that each router must have IP connectivity to the remote address. It is considered generally good practice to use loopback IP addresses as source and destination, if the routers have loopbacks.

After you get the GRE tunnel running, you must get IPX into the tunnel. It is quite simple. In tunnel configuration mode you enter ipx network .