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DHCP on a private address range

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3 replies

by buckle

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I have about 500 laptop and 200 desktop computers and a single C class address. I am trying to set up a DHCP pool in a private address space 172.21.248.0-172.21.251.0 subnet 255.255.252.0 Everything looks ok on a W2K and NT4 server exept that no addresses are leased out. Both of these servers work properly with an address range from the C class range

3 replies

by bohicam1

For starters, the 172 range is a class B address range. Have you set your ranges to be 172.21.248.1 to 172.21.248.254
172.21.249.1 to 172.21.249.254
172.21.250.1 to 172.21.250.254
172.21.251.1 to 172.21.251.254
as opposed to one big lump?
Checkthe little stuff, are all clients set to obtain IP automatically? Is the DHCP service started and running properly?
What is the lease time on each address? If all else fails, try one machine with the DHCP server as it's gateway and see if that works..maybe it is a wan/lan issue.
Good luck!

Mike

by buckle

172.21.. is a B class address and hence has the range 172.21.0.1 to 172.21.255.255 if it has subnet mask of 255.255.0.0 This has been subdivided by using the subnet mask 255.255.252.0 to give us the range 172.21.248.0-172.21.251.255. Everything else works perfectly with same servers using addresses from our C class range.

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