PIX internet link and IP change?

[cahelmster]

We are currently using a PIX 515 with a DSL Internet connection. We just had a T1 link installed with a different IP scheme, same ISP. Our ISP is advising that we setup both links into the PIX so that we will have minimal downtime as the new DNS entries propagate around the Internet (they host our domain). Right now, I have the DSL in Ethernet 0 and Ethernet 1 goes to a router. I do have an Ethernet 2 port that is not being used. What is the best way to do this?

Any help is greatly appreciated!

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Thanks!
CH

 

[baddos]

What router is the new t1 on?

 

[cahelmster]

The new T1 goes into a CSU/DSU port on a 2600 series Cisco router...not sure what model...I think it might be a 2651...

----------------
Thanks!
CH

 

[baddos]

You could do it a couple of ways...

I'm not sure exactly how many IP addresses etc, but here is a way to do it.

Make your PIX respond to the new ip address range by adding static commands.

static(inside, outside) xxx.xxx.xxx.1 xxx.xxx.xxx.2 255.255.255.255

xxx.xxx.xxx.1 is the new IP and .2 is the old one.

Then in your router set it up to route the new IP addresses to the outside IP address of your PIX.