I am a novice at this so if somebody could help with step by step instructions it will be appreciated: I have a closed network consisting of two servers and several workstations. Things have been going well until recently when, after adding new workstations I ran out of IP Addrress's. Now how to extend the range. I have collected the following regarding the current DHCP setup but am totally ignorant on the subject of extending the range. Starting IP address: 10.130.1.226 End IP address: 10.130.1.254 Subnet Mask: 255.255.255.224 How would I go about extending the range with say 10 IP's. Reducing the start or increasing the end address simply gives error messages. As I have mentioned, this is a closed network so I cant foresee clashes of sorts regarding the selection of a particular range. Can somebody help please?

change the Subnet Mask to 255.255.255.0 Then Change the IP's To 10.130.1.6 to 10.130.1.254. You'll probably want to set the Servers Static to 10.130.1.2, 10.130.1.3, that leaves .4 and .5open for other static devices.

You can use a 255.255.255.192 mask and this will start your address range at 193 thru .254. Go to wildpackets.com and download their subnet calculator (it's free) and then you can play around with different masks and you can decide how you want to go forward. This thing is very easy to use , best one i have seen .

Why are you using a subnetted class A network? Since you're using a (subnetted) class C subnet mask, then you should simply use a class C address scheme without the subnetting. 192.168.0.1..254 w/mask 255.255.255.0

jro, thanks for the advice and I have tried to change the subnet mask to your recommended setting, using the TCP/IP configuration option. The new subnet mask is accepted but once I return to the DHCP settings screen to change the start and end IP address the subnet mask is as it was and changing the IP range simply results in an error message. Going back to the TCP/IP settings indicates that the ammended address has been accepted. There is only the one scope in the DHCP settings window and its properties window only allows for changes to the start and end IP address's, the subnet mask is grayed out. What am I missing here? Please bear in mind that I am a complete novice in this particular field so any reply will require handholding..... Thanks

Here's another idea Change your Server's Static Addresses to 10.130.1.2 Subnet 255.255.255.0 10.130.1.3 Subnet 255.255.255.0 And copy down the Gateway and type that in, your servers are most likely already static Then goto each Work Station and change their settings to Static and Manually Add the IP's to 10.130.1.6 and so on until your finished this will be a pain. Before you do that there has to be a way to change the subnet mask, you might have to change the subnet mask on the Server's Static IP before you can change it in DHCP.