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Add subnet to network

So i need to expand the main network for a client. They currently are on a 10.10.10.0/24 scheme. If i'm correct, the process would involve changing them to a /23, which would open up the 10.10.11.0 subnet to be used by DHCP. I know its not that simple, so i wanted to review what needs to be done in order to accomplish this. Currently everything is setup with subnet masks of 255.255.255.0 which will need to be changed to .254 for anything with a static IP address? The gateway is currently 10.10.10.1, so i should not need to modify anything on that end, and then add an additional DHCP scope to include the 10.10.11.X addresses.

I know i'm overlooking steps, so feel free to list/ask me questions.

As always, i appreciate the help.
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Avatar of Seth Simmons
if it's /23 then the last usable address would be 10.10.11.254
10.10.10.254 would be /24

shouldn't have to create new dhcp scope for the .11 range; the .10 should cover it when changing to /23
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altitudetek

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Both good to know, in terms of the static addresses are there anything i need to concern myself with regarding gateway and subnet. As far as i could think changing the subnet mask and leaving the gateway (since it remains unchanged) was all that would require. Nothing would change on the firewall aside from the same change to a /23 network
Only change will be the subnet mask.

As seth says you do not need to create a new scope

Just modify the existing scope when your ready.
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Thanks for the input. I'll have to create a good spreadsheet for all the static's on the network but it looks like i have what i need to move forward with this.