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Subnetting for for more IP addresses

Tags:
  • Subnet
  • Default Gateway
Last response: in Networking
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September 16, 2014 3:54:53 PM

Server set for DHCP. Current scope range is 10.0.5.1 using 255.255.255.0.

We need more addresses. So I know about changing subnet to 255.255.254.0 which will give me 10.0.5.1 - 10.0.6.254.

How do I set up the scope? When I set up the range of 10.0.5.1 - 10.0.6.254 I get a message about having to set a superscope. So I allow superscope.

My gateway is 10.0.5.1. If I take a workstation and manually set ip address of 10.0.6.22 with subnet 255.255.254.0 and default gateway of 10.0.5.1, I get a message "Warning - The default gateway is not on the same network segment (subnet) that is defined by the IP address and subnet mask."

I'm confused as to the gateway settings with this scope. Any help?

More about : subnetting for addresses

September 16, 2014 4:14:14 PM

If you are looking to build a network for more than 253 devices (internal IP addresses), you're asking the wrong questions.

10.0.5.x and 10.0.6.x are indeed different subnets, and cannot (easily) talk to each other.

What equipment do you have that is supposedly serving this range?
What does the vendor say?
What does your IT guy say?
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September 16, 2014 4:15:45 PM

You have the boundary wrong. You would need to use 10.0.4.0 and 10.0.5.0. You can I suppose use 10.0.5.1 as you gateway if you like but it is not real standard.
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September 16, 2014 4:31:51 PM

Oh thank you. I obviously was missing the logic. I just tested the changes on the new scope and it works. Thank you again.
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