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DNS Error too many workstations


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#1 Pirate Gonzo

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Posted 11 July 2011 - 10:02 AM

I have a network of 18 workstations and 6 servers. Anytime I add one more to the network I get a DNS Error. I then have to take one workstation off the network to add the new one. I am not sure what is causing this to happen.

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#2 cryptodan

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Posted 11 July 2011 - 10:14 AM

Are you using a DHCP Network, and if so how many IP's are allocatable in the DHCP Pool?

#3 Pirate Gonzo

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Posted 11 July 2011 - 12:37 PM

Are you using a DHCP Network, and if so how many IP's are allocatable in the DHCP Pool?


Yes I am using DHCP and currently have 192.168.74.42/253 for distribution.

#4 cryptodan

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Posted 11 July 2011 - 12:44 PM

Try not using DHCP and statically assign the IP's and see if you get the same effect?

#5 dirtdog900

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Posted 11 July 2011 - 03:30 PM

That doesn't sound like a typical DNS error to me, adding the workstation would fail regardless of removing others if the DNS is incorrect (if this is a windows network). Are you running a MS Small Business Server? If not, what OS is the server and the workstations? Can you screenshot the error and post here for us to see?

Edited by dirtdog900, 11 July 2011 - 03:33 PM.


#6 gleazer

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Posted 12 July 2011 - 08:52 AM

Since you said you have a network of 18 workstations and 6 servers, that's 24 nodes. You are currently using :
192.168.74.42/253 for distribution.
/253 is NOT a valid net mask.
Try using /27 255.255.255.224 , this will give you up to 32 nodes.

#7 cryptodan

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Posted 12 July 2011 - 08:54 AM

Since you said you have a network of 18 workstations and 6 servers, that's 24 nodes. You are currently using :
192.168.74.42/253 for distribution.
/253 is NOT a valid net mask.
Try using /27 255.255.255.224 , this will give you up to 32 nodes.



He wasn't using that as a netmask. I believe he was stating that his range from 192.168.74.32 to 253. And used Short hand.

#8 Sneakycyber

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Posted 16 July 2011 - 03:12 AM

And a subnet mask of 255.255.255.224 borrow 3 bits leaves 5 2^5 =32 minus 2 for the network address and broadcast address leaves 30 useable. He has an ip address range given as x.x.x.42-253 so 253 - 42= 211 plus the 24 he's using =235 his subnet mask must be 255.255.255.0 he has 1 network with 254 available addresses.

Edited by Sneakycyber, 16 July 2011 - 03:56 AM.

Chad Mockensturm 

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Certified CompTia Network +, A +





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