DHCP Server

How to I configure in dhcp scope 192.168.1.0/22 .Due to my company IP address is no enough so I plan to using subnet to increase the host. existing DHCP scope is 192.168.1.50~253/24,so I need client to get IP from DHCP server what should I do if the IP is full now?
YaYangTeahAsked:
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JohnBusiness Consultant (Owner)Commented:
To be clear, you are going to use the range 192.168.1.50 to 192.168.1.253 or roughly 200 addresses. Is this correct?  I assume so. Then just set up clients as DHCP and they will get one of the 200 addresses. It will not be a problem.
YaYangTeahAuthor Commented:
Let said I need 350 IP address what should I do ?
JohnBusiness Consultant (Owner)Commented:
If you need 350 addresses then use 192.168.1.0 - through 192.168.2.255 with a subnet mask of 255.255.254.0

See this article to assist you   http://www.dslreports.com/faq/15260
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lruiz52Commented:
Hi John,

The useable range for the /23 subnet  would actually be

192.168.0.1 - 192.168.1.254

Network address 192.168.0.0
Broadcast address 192.168.1.255
Subnet mask 255.255.254.0
JohnBusiness Consultant (Owner)Commented:
The original post wants to start at 1 not 0
lruiz52Commented:
Yayangteah,

If you use the /22 subnet mask your ip scheme would be;
Network: 192.168.0.0
Usable Range: 192.168.0.1 - 192.168.3.254
Broadcast: 192.168.3.255

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JohnBusiness Consultant (Owner)Commented:
/23 /22 are just notations and Yayangteah want to start at 192.168.1.x NOT 192.168.0.x. I think you should change your starting point to match the question .
lruiz52Commented:
John,

Then he would need to use the /22 255.255.252.0
JohnBusiness Consultant (Owner)Commented:
For 350 addresses, a person should be able to use 192.168.1.0 to 192.168.2.255 subnet mask of 255.255.254.0. That should work.
lruiz52Commented:
JohnBusiness Consultant (Owner)Commented:
I have read that article.
lruiz52Commented:
K
YaYangTeahAuthor Commented:
I am trying play around my home router to simulate the DHCP Scope change from 192.168.1.253 to 192.168.2.15/255.255.254.0 instead of 192.168.1.100 to 192.168.1.199/255.255.255.0.

The error has me prompt me and not allow me to change (Bad IP address Pool).Please advise ?
YaYangTeahAuthor Commented:
I change the scope to 192.168.0.253 to 192.168.1.15/255.255.254.0 ,that was fine ,please advise ?
lruiz52Commented:
thats correct, with the 255.255.254.0 subnet mask, you first available ip is 192.168.0.1, the last available ip is 192.168.1.254.

192.168.2.15 is in separate network ranging from 192.168.2.1 to 192.168.3.254 that is why you received the error.

You will need to change the subnet mask on any computer that has a static ip set.
Qlemo"Batchelor", Developer and EE Topic AdvisorCommented:
lruiz62 is correct. You cannot start at 192.168.1.0, as any extension of the subnet mask (up to and including /16) leads to a network base address of 192.168.0.0. And with 192.168.0.0/23, you cannot use .2 as the same network - you need 192.168.0.0/22  (255.255.252.0).
As said in the other thread (duplicate, and will get deleted), you can add reservation to your DHCP scope to exclude "static" IPs, or just change the scope to start at e.g. 192.168.0.64 or whatever.
Since you are using a non-standard subnet mask, add the subnet mask as a DHCP option to the scope.
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