Solved

can I supernet to save time

Posted on 2004-09-15
3
291 Views
Last Modified: 2010-04-10
First time poster.

Our private network currently uses 192.168.0.0/24 (subnet mask 255.255.255.0). We're out of IP addresses. I would simply like to supernet and change our network to 192.168.0.0/16 (subnet mask 255.255.0.0). I know I'll be treating a class C range as a class B, but will it work? Research I have done so far says it will and it will save a lot of time. We have a Cisco PIX firewall.

Thanks.
0
Comment
Question by:dbowman_nna
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 2

Expert Comment

by:jasperomalley
ID: 12070593
Yes.
0
 
LVL 15

Accepted Solution

by:
adamdrayer earned 50 total points
ID: 12070820
only a couple of things that may hinder you but probably won't are:

1. Present or future VPN connections with other 192.168.x.x addresses won't work
2. Your broadcast address for the network has changed from 192.168.0.255 to 192.168.255.255.  Not a big deal, but something to keep in mind in case it breaks anything.

Also make sure that whatever is performing your NAT is also reconfigured.  If it's a firewall, you may have to alter the rules
0
 
LVL 11

Expert Comment

by:PennGwyn
ID: 12070919
You might consider going to /20 (255.255.240.0) rather than all the way to /16.

Note that this is only legal because all of the 192.168.x.x subnets are reserved by RFC 1918.  If you were using 172.16.0.0/16, you could not make the analogous leap to 172.0.0.0/8....

0

Featured Post

Is your NGFW recommended by NSS Labs?

Ours is! NSS Labs Next Generation Firewall Test gives the WatchGuard Firebox M4600 a "Recommended" rating! Curious where your NGFW landed on the  Security Value Map? See the map and download the full report today!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Many of the companies I’ve worked with have embraced cloud solutions due to their desire to “get out of the datacenter business.” The ability to achieve better security and availability, and the speed with which they are able to deploy, is far grea…
WARNING:   If you follow the instructions here, you will wipe out your VTP and VLAN configurations.  Make sure you have backed up your switch!!! I recently had some issues with a few low-end Cisco routers (RV325) and I opened a case with Cisco TA…
Internet Business Fax to Email Made Easy - With  eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…
Michael from AdRem Software outlines event notifications and Automatic Corrective Actions in network monitoring. Automatic Corrective Actions are scripts, which can automatically run upon discovery of a certain undesirable condition in your network.…

690 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question