DHCP server configuration

Hi to all!

I have question about DHCP server configuration:

For example i have subnet: 


10.10.8.50 - 10.10.8.100 - LAN1 (MASK 255.255.252.0 /22)

and second subnet :

10.10.11.50 - 10.10.11.70  - LAN2 (MASK 255.255.252.0 /22)

I need to add this two scope in DHCP server (windows server 2012 R2). After add the first one , can't add second (LAN2) because this have conflict seems the mask is the same. How to split this subnet and add this to DHCP server?

Should i use  Superscope?

Thanks for help!


August 25th, 2015 10:40am

It's because those subnets do conflict. You shouldn't use such a large mask or make your subnet ranges farther apart. Both ranges you provided fall within this subnet:

10.10.8.1 - 10.10.11.254

/22 gives 1024 usable hosts. Change the mask to /24 (255.255.255.0) and it will work.

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August 25th, 2015 11:01am

Hi

 You can't have two scopes on the same subnet,and as you mentioned you could configure a superscope.

check this article for configure superscope

https://technet.microsoft.com/en-us/library/dd759168.aspx?f=255&MSPPError=-2147217396

August 25th, 2015 11:01am

Thanks for reply i already think about this. But i have problem the DHCP server should give net mask 255.255.252.0 to the client....
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August 25th, 2015 11:10am

Hi olegmg,

According to your description, you still want to use net mask 255.255.252.0.

Gererally, if we want to use net mask 255.255.252.0, the IP range may be 10.10.4n.x-10.10.10.4n.y, n=0,1,2,3,4 

We may change the scope to 10.10.12.x-10.10.12.y; 10.10.16.x-10.10.16.y or other larger network ID.

Best regards,

Anne he

August 25th, 2015 10:10pm

Yes i can put all to one scope 10.10.8.0/22 but, i want to separate scope  inside this scope  for , test environment, printers and servers...

How to split this scope or divide for smaller scope with net mask 255.255.252.0?

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August 26th, 2015 2:13am

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