I am about to deploy a new ASA into a network. We will be replacing a rather old PIX as a result.
We will be leaving the PIX in place for a time period as a precautionary backup. If the ASA doesn't work (It will be configured the almost the same as the PIX), can I plug the PIX back into the network as an added measure of precaution?
i'm worried that the switches will see the PIX's IP address however the MAC address will be different. Will this matter?