Solved

DHCP Resubnetting

Posted on 2013-01-31
3
655 Views
Last Modified: 2013-02-01
Hello All,

I have a subnet that will be running out of ip addresses soon, because we are merging floors. I have read some post in here that state resubnetting is not a good idea, because of going over the 250-300 ip addresses per subnet create network latency (there are approx. 100-110 users, but it is ip phone and computer). Anywho here is my situation.... My subnet is 172.22.8.x/24. I have a core switch that has a few vlan's on it with subnets of there own; 172.22.5.x, 172.22.12.x, 172.22.24.x...etc all /24. If I resubnet the .8 network to a /23 will I have to change any of the other default gateways or just this one since they are all separate vlans? Also, if I choose to add another subnet to the .8 subnet will that affect any of the others. I assume I would have to delete and start a new one regarless of the way I proceed. Any suggestions as to the better method?
In addition to, I have other switches in the environment, would they need to be changed?
0
Comment
Question by:DDCO
  • 2
3 Comments
 
LVL 44

Accepted Solution

by:
Darr247 earned 500 total points
ID: 38840750
If you change the scope 172.22.8.0 /24 to 172.122.8.0 /23, its new IP range will be
172.22.8.0 - 172.22.9.255, with 172.22.8.1 through 172.22.9.254 as assignable IPs.

I don't see why you would need to change its default gateway, though.
0
 

Author Comment

by:DDCO
ID: 38841014
Now it's gateway is 172.22.8.225. So as long as the gateway is in the allotted subnet it would not matter?
0
 
LVL 44

Expert Comment

by:Darr247
ID: 38842133
Not that I can see, no.  

There is a problem with CIDR being broken in older versions of windows, but that problem doesn't appear until you get smaller than /16 with a 172.16-32 subnet.
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
Windows 7 home sp1 updates 9 92
some web sites not loading.  What could be the problem? 16 50
help!! No network & No Internet connectivity 4 52
Windows IPv6 DHCP server 8 37
Ever wondered why you had to use DHCP options (dhcp opt 60, 66 or 67) in order to use PXE? Well, you don't!
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…
This Micro Tutorial will teach you how to censor certain areas of your screen. The example in this video will show a little boy's face being blurred. This will be demonstrated using Adobe Premiere Pro CS6.
Both in life and business – not all partnerships are created equal. As the demand for cloud services increases, so do the number of self-proclaimed cloud partners. Asking the right questions up front in the partnership, will enable both parties …

920 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

14 Experts available now in Live!

Get 1:1 Help Now