Solved

How to increase available IP addresses on DHCP without changing subnet range

Posted on 2014-10-13
3
1,263 Views
Last Modified: 2014-10-15
We have a quickly growing network and we're almost out of available IP addresses in our DHCP scope.  We have many IP addresses excluded with static IP addresses assigned to network servers, printers, etc.

WHAT are our options to increase the available IP addresses on our LAN without changing the subnet range or creating a VLAN on our outdated switches?

Thanks,
Shane
0
Comment
Question by:ComputerPros-ga
3 Comments
 
LVL 6

Accepted Solution

by:
Wylie Bayes earned 500 total points
ID: 40376985
Sorry to be the bearer of bad news.....Those are your only two options.  Add additional vlans/scopes, or make the scopes/vlans you have now Larger.
0
 
LVL 6

Expert Comment

by:LHT_ST
ID: 40377064
the only other option is to make sure all the devices on your current scope are active and online. No point keeping addresses reserved for devices that aren't there.

Other than that see above - only way to do it is to add additional scopes, vlans.
0
 
LVL 25

Expert Comment

by:Fred Marshall
ID: 40377532
First you need to answer the question:
"Does our DHCP scope take up most of the entire subnet addresses?"
If so, then you've already received good answers.
If not, then you only need to change the DCHP range - making sure you don't overlap any static addresses in use.

For example:
Static: 10.10.10.1 to 10.10.10.20
Static: 10.10.10.50
DHCP: 10.10.10.100 to 10.10.10.250
Static: 10.10.10.251 to 10.10.10.254
with 10.10.10.21 to 10.10.10.99 unused except for 10.10.10.50.

In this case:
1) change the IP address currently at 10.10.10.50 to something in 10.10.10.251-10.10.10.254
2) change the DHCP range to 10.10.10.30 to 10.10.10.250
(keeping 10.10.10.21-10.10.10.29 reserved for spares).
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Two of my three WiFi Routers lose connection 6 53
Etherchannel trunking 10 41
Why do I get "media disconnected" when I run ipconfig? 2 30
DHCP Server 14 63
Data center, now-a-days, is referred as the home of all the advanced technologies. In-fact, most of the businesses are now establishing their entire organizational structure around the IT capabilities.
When you try to share a printer , you may receive one of the following error messages. Error message when you use the Add Printer Wizard to share a printer: Windows could not share your printer. Operation could not be completed (Error 0x000006…
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…
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…

910 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

22 Experts available now in Live!

Get 1:1 Help Now