Hi folks,
Multi-site network at work is starting to get full, and we're running out of IP addresses on some subnets! The bugbears of when the network was set up ~7 years ago, when there were only a handful of computers, and people didn't think that we'd have CT/MRI/Xray scanners attached to the network and sending diagnostic imaging all over the hospital!
Basically, we have:
IP: 10.1.1.x - Mask: 255.255.255.0 - Site A
IP: 10.1.2.x - Mask: 255.255.255.0 - Site B
IP: 10.1.3.x - Mask: 255.255.255.0 - Site C
IP: 10.1.4.x - Mask: 255.255.255.0 - Site D
Each site is physically it's own seperate network, but with routers connecting them via leased line. Site A (10.1.1.x) is the "centre" of our network - each other site is connecting into Site A.
We're rapidly running out of IP addresses, and we have lots of equipment on static IPs at each site - of course the simplest would be to take everything to 10.1.x.x and 10.2.x.x etc with mask of 255.255.0.0 (to take us from 254 hosts to 65534, but changing these IP addresses/subnet masks isn't going to be an easy (or cheap!) task.
After having a quick look, we've come across what Microsoft calls a "superscope" for DHCP, if I understand correctly, it allows us to have multiple DHCP scopes of different subnets attached to the same physical network, allowing us to add additional subnets to the current ones, without having to re-address all our existing equipment. However, I'm not too sure whether this is right, and additionally, how all the equipment on one site would talk to each other.
Any help/advise would be greatly appreciated, it's been over 5 years since I did any network design/subnet calculations, and my head's gone into meltdown trying to regurgitate what I had previously learnt!!
Cheers!
Garry
Multi-site network at work is starting to get full, and we're running out of IP addresses on some subnets! The bugbears of when the network was set up ~7 years ago, when there were only a handful of computers, and people didn't think that we'd have CT/MRI/Xray scanners attached to the network and sending diagnostic imaging all over the hospital!
Basically, we have:
IP: 10.1.1.x - Mask: 255.255.255.0 - Site A
IP: 10.1.2.x - Mask: 255.255.255.0 - Site B
IP: 10.1.3.x - Mask: 255.255.255.0 - Site C
IP: 10.1.4.x - Mask: 255.255.255.0 - Site D
Each site is physically it's own seperate network, but with routers connecting them via leased line. Site A (10.1.1.x) is the "centre" of our network - each other site is connecting into Site A.
We're rapidly running out of IP addresses, and we have lots of equipment on static IPs at each site - of course the simplest would be to take everything to 10.1.x.x and 10.2.x.x etc with mask of 255.255.0.0 (to take us from 254 hosts to 65534, but changing these IP addresses/subnet masks isn't going to be an easy (or cheap!) task.
After having a quick look, we've come across what Microsoft calls a "superscope" for DHCP, if I understand correctly, it allows us to have multiple DHCP scopes of different subnets attached to the same physical network, allowing us to add additional subnets to the current ones, without having to re-address all our existing equipment. However, I'm not too sure whether this is right, and additionally, how all the equipment on one site would talk to each other.
Any help/advise would be greatly appreciated, it's been over 5 years since I did any network design/subnet calculations, and my head's gone into meltdown trying to regurgitate what I had previously learnt!!
Cheers!
Garry