Changing SubNet Mask 1

[VieiraR]

Ok I am stumped.
I hope this is in the right forum. We were recently using a subnet Mask of 255.255.255.0 We are chaging it to 255.255.252.0 due to expanding the network. HOwever when we changed it on the DHCP Server (Windows NT 4 sp6). I tried to ipconfig /release then /renew. I am unable to renew. Or IP address is within the limited range. Any ideas

Rich

 

[Comstocb]

Is the DHCP server on this same network? If it is, did you modify the mask for the DHCP servers interface? Since you changed it to .252, does the default router IP address change? If so does all equipment know this? (DHCP server, scope configuration, router, etc.) If its not on the same network, is the bootprelay configured correctly on the router that will forward the DHCP discover?

 

[clearwater6]

Hi Comstocb,

While your if's are very helpful, I would appreciate it very much if you would kindly give us the methods as to how we can resolve the problem thus eliminating theifs you suggested.

thank you.