Solved

Increasing IP addresses in a domain

Posted on 2013-01-31
8
161 Views
Last Modified: 2013-02-06
I have a small domain that supports approx 100 users in 7 buildings. We are running a Citrix virtual environment, I run on a private network address of 192.168.100.xxx SM 255.255.255.0 I am out of IP addresses and would like to increase by changing the mask to 255.255.254 that should give me plenty of room for growth. My GW is 192.168.100.254.  I would like to use IP addresses 192.168.100.xxx and 192.168.101.xxx. Can I modify current scope or just create a new one and is there anything to watch for?  We have a 24/7 operation in fire and rescue so downtime needs to be minimal. We do have a firewall Cisco 5510 that we set behind. Thanks in advance for advice.
0
Comment
Question by:Redoct59
8 Comments
 
LVL 20

Accepted Solution

by:
rauenpc earned 250 total points
ID: 38842386
You to should be able to change the gateway mask without interuption. You will also need to change the subnet mask on all devices in the subnet to work properly. The firewall may need to have routes acl, and nat adjusted to allow the additional ips through.
0
 
LVL 20

Assisted Solution

by:agonza07
agonza07 earned 250 total points
ID: 38842483
First off, I think you meant 255.255.254.0 not 255.255.255.254.....

Second, make sure to change all your devices with static IPs and like rauenpc said, make sure to adjust your NAT and firewall settings.

After that, modify your DHCP scope as you suggested and you should be good.
0
 

Expert Comment

by:gaurav_mcp
ID: 38842487
you have only 100 user what is problem you r facing acc you 253 ip on same network.i don't you will have problem
0
 
LVL 10

Expert Comment

by:cpmcomputers
ID: 38842586
My thoughts also ? You should have 253 ip's available as you are ?
0
Free camera licenses with purchase of My Cloud NAS

Milestone Arcus software is compatible with thousands of industry-leading cameras for added flexibility. Upon installation on your My Cloud NAS, you will receive two (2) camera licenses already enabled in the software. And for a limited time, get additional camera licenses FREE.

 

Author Comment

by:Redoct59
ID: 38843923
Oops yes, lef a 0 off there on the SM. So rauenpc/agonza07, you say i should make the modifications (change mask) to all the static devices and firewall prior to modifying DHCP. Do you see a problem leaving the gateway at 192.168.100.254??? I know it's not best practice, but one less thing to configure?  Thanks for your posts!

We have several mobil devices and access point that require IPs and we are right at the brink of running out. I want to add now so i don't run into denials.
0
 
LVL 20

Expert Comment

by:rauenpc
ID: 38844319
You can leave the gateway address as is. There isnt actually a best practice related to gateway address within a subnet, but since most people assume the gateway ends with a .1 or .254 it can cause confusion when the fateway is. 43 or something odd.
0
 
LVL 20

Expert Comment

by:rauenpc
ID: 38844322
Fateway.... gateway. Darn smart phones.
0
 
LVL 20

Expert Comment

by:agonza07
ID: 38844614
The other thing you can do is assign a secondary IP address to your gateway. That way you still have the old gateway address running at the same time as the new one.
0

Featured Post

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

Trying to figure out group policy inheritance and which settings apply where can be a chore.  Here's a very simple summary I've written which might help.  Keep in mind, this is just a high-level conceptual overview where I try to avoid getting bogge…
Is your computer hacked? learn how to detect and delete malware in your PC
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…

746 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

15 Experts available now in Live!

Get 1:1 Help Now