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Changing Subnets

T

tvanduzee

Member
Hello
Network: 192.168.0.x in one location (servers, Phones, Printers, clients)
Network: 10.10.2.x in another location (servers, Phones, Printers, clients)

Everything is setup to be part of the same lan and it works fine. However, on the 192.168.0.x network, I am running low on IP addresses (I'm not out of them, but it is uncomforable with only 15 or so left.

I have a voip system, printers and clients all on the same subnet (Inherited). I would like the phone system on a separate subnet (say 192.168.1.x). How much work is it to do this? The phone system is in 2 cities and all part of the same system (except one site uses extensions 3xxx and the other site 2xxx) - Shoretel system. Right now the phone system uses dhcp from the 192.168.0.x part of the network for one city and dhcp from 10.10.2.x in the other city, and I could release about 60 IPs or more by re-subnetting the phones in the 192.168.0.x subnet.

I have a sonic device tunneling vpn to the other city

Any suggestions? (Noob)

Thanks
Terry
 
On the class C subnet (192.168.0.0) what is the size of the subnet? Is it a /24?

If so, then simply increase the subnet size, to say /23 or /22. This would depend on your existing and future needs of course.
 
So,
In doing so, I understand borrowing bites from the 3rd octet, but does that mean that if I borrow 1 bit then I can use 192.168.1.x or 192.168.2.x or 192.168.3.x within the same network? So, in this case I would need to change my mask from 255.255.255.0 to 255.255.252.0 ?
 
Last edited:
tvanduzee said:
So,
In doing so, I understand borrowing bites from the 3rd octet, but does that mean that if I borrow 1 bit then I can use 192.168.1.x or 192.168.2.x or 192.168.3.x within the same network? So, in this case I would need to change my mask from 255.255.255.0 to 255.255.252.0 ?
Click to expand...

yep, change mask for everyone and boom, you get the .1 the .2 and the .3 within the same network!

you're using dhcp! even easier, just change the mask on the DCHP server .. . everyone within the original mask will be able to talk to the 250 hosts = everyone else within the original mask while you transition. . . once their lease is up (1 day?) they'll get the modified mask and be able to talk to the new 1000 hosts
 
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