Access control list to control route access

[ddalessa]

My company just purchased a small company with an existing network, and am in the process of configuring routers for their eventual connection to our network. They are using a public IP segment which they do not own that must be supported for a short time while they migrate to our private IP scheme. I need to implement an ACL that will not allow this public route to enter our Autonomous system. Honestly, while I have created my share of what I consider basic ACLs, I am having difficulty "seeing" how this ACL will look like. Any suggestions? Thanks, Dan

[pnschurr]

You need to provide some data to support the question.

What routing protocols are you using,

Is the internet involved,

What does "seeing" mean.

Can their environment be summarised to a single prefix.

You want to NOT have this route in your network?

peter

[ddalessa]

routing protocols are ip and ipx

Yes, the Internet is involved

"seeing" as I'm having difficulty envisioning what the ACL will look like.

I believe it can be summarised to a single prefix

Yes, definitely do not want this route in my network.

[ddalessa]

Here's a question: A colleague suggested that I NAT their public IP to our private IP scheme. Would that work?