Solved

How to change from CLASS-C to CLASS-B IP Schedule

Posted on 2009-04-03
7
504 Views
Last Modified: 2012-05-06

Currently our Network is on Class-C network segment but it was poorly configured to ALL static ip addresses and NO DHCP at all.  Now our network has extended so far that very soon we'll run out of IP addresses.   I don't have a lot IP management background as it relates to switches and routers, but DHCP configuration that I can do.  Now, the BIG Question is???? what's the process of switching from a CLASS-C to a CLASS-B network segment?   Do we need to hire an expert to do this or it's something I can setup a DHCP and point all the servers, NATed devices, workstations to it?   We've a very complicated network.......our systems talk to other systems around the country 24/7 and all the mission critical applications MUST be ONLINE at ALL Times.
If I need to explain further, please let me know.

thanks,  
0
Comment
Question by:timnjohnson
  • 4
  • 3
7 Comments
 
LVL 8

Expert Comment

by:Sniper98G
Comment Utility
Are you using public or private IP space?
If you are using private IPs you can just bump your mask one bit to the left and double your IP space. Once you go over 500 addresses though you should think about going with multiple subnets.
If you are using public space it get a lot more complicated. You would need to get another network from ARIN.
0
 

Author Comment

by:timnjohnson
Comment Utility

We're using Private 192.168.x.x but it also connects to other NATed devices on the Public space.
Using 192.168.1. 1 -as our gateway, how can you double that...give me a little 102 guide.  

thanks,
0
 
LVL 8

Expert Comment

by:Sniper98G
Comment Utility
So right now you are using a 255.255.255.0 mask, correct.
If you change your mask to 255.255.254.0 your usable range will be 192.168.1-2.x
Just change the mask on all your clients and begin using the additional space no further changes would be required.
0
How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

 
LVL 8

Expert Comment

by:Sniper98G
Comment Utility
Sorry.
Your usable rage will be 192.168.0-1.x
You still will not need to make other changes.
0
 

Author Comment

by:timnjohnson
Comment Utility

I think our biggest problem is how to go about notifying other parties and locating devices that are still pointing to the old address.    It's a very scary thing to do on a live production network and because no one the tech team is well equipped to handle this kind of infrastructure change, I think a qualified contractor is best suited for this.   Does anybody else think otherwise?  Let me hear your opinion, I need to meet with our IT manager who has no IT technical background at all, and give him my suggestions.    We run a 24/7 operations center and anything we do, will affecting more people and has a potential of shutdown our network for days if not weeks.  Is there a workaround? Can add to what we have without interrupting or touching our current IP configuration?   A lot of questions to............
0
 
LVL 8

Accepted Solution

by:
Sniper98G earned 500 total points
Comment Utility
None of your old addresses should change if you just alter your subnet mask. Your current space will be left entirely intact and you will simply have additional addresses. If you have firewalls, ACLs or firewall holes along the way they will also need to have their subnet/wildcard masks changed. But; once you pass the device that does your NAT noone will even know the differance.
0
 

Author Closing Comment

by:timnjohnson
Comment Utility
seems that the answer may not be straight forward but will do more research to come up with complete solution.  
0

Featured Post

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

Join & Write a Comment

Article by: rfc1180
The Maximum Segment size (MSS) is an important consideration when troubleshooting connectivity via the Internet/Intranet. As the packets are routed via the Internet/Intranet, the packets must traverse through multiple routers in the path between two…
A Cisco router can be configured as a DHCP Server. There are advantages and disadvantages in making your Cisco router work as DHCP Server. Almost all the features for windows DHCP can be configured on Cisco-based DHCP server. Some of the features me…
Viewers will learn how to properly install and use Secure Shell (SSH) to work on projects or homework remotely. Download Secure Shell: Follow basic installation instructions: Open Secure Shell and use "Quick Connect" to enter credentials includi…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

763 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

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now