Network Supernetting/Subnetting Change
Posted on 2013-01-02
So I have a situation that I inherited and I am not quite sure how to successfully perform this subnet change.
I recently (2 months ago) started a new job as network admin for a small company going through a growth spurt. The existing network is a 192.168.1.0/24 subnet which has become too small. I would like to change this to a 192.168.1.0/22 subnet with minimal interruption to the network. Here is the caveat to this whole process. The routing of the network is being handled by a Cisco Pix 506e, currently addressed at 192.168.1.1. Technically I should be able to change the subnet mask on all the devices to make this work, but, what change do I need to make in the PIX to route these extra addresses? Route Add statement?
I want to keep the existing servers/printers on the 192.168.1.xx segment while moving DHCP to 192.168.2.x and VOIP to 192.168.3.x and thereby leaving 192.168.4.x for future expansion. Feel free to call me an idiot if I have this wrong, but I feel it's got to be something simple. Yes, I realize it's old equipment that needs to be changed out but being a small company it's baby steps to get that new ASA device and Switches =)
Thanks for any help that can be offered in advance......