running out of ip addresses

**biglad999** · April 22nd, 2004, 09:30 AM

I have just got my first role in I.T looking after our network consisting of approx 20 servers, 200 pc's 30 printers etc, we are currently using a 10.0.6.x dhcp scope, but i need to introduce a 10.0.7.x scope also, everything is confined within a single site, single domain, what is the best way to extend my network with minimum disruption to allow me to add another 250'ish pc's i believe i need to use a subnet to do this but not sure how to implement it, any help on this would be truly appreciated.

**silencio** · April 22nd, 2004, 10:10 AM

Drop in a router, set up your routing tables or routing protocol, make it a dhcp relay agent, setup your new scope and go home.

**CeeBee** · April 22nd, 2004, 10:24 AM

Create a superscope then add a new scope that allows more IP addresses. Then ask for a bonus because they don't have to buy the router that silencio suggested.

**NooNoo** · April 22nd, 2004, 10:27 AM

Then work off that bonus because your collision domain is unmanageable.

**CeeBee** · April 22nd, 2004, 10:45 AM

Originally Posted by NooNoo

Then work off that bonus because your collision domain is unmanageable.

Maybe you'll care to elaborate why...

**dddwarp** · April 22nd, 2004, 12:38 PM

Originally Posted by silencio

Drop in a router, set up your routing tables or routing protocol, make it a dhcp relay agent, setup your new scope and go home.

This is the best way. Do not just find a fix but think about the future and what is the best method. With this many workstations, you need two networks.

Instead of a new router, you could buy layer 3 switch like a Cisco 3550 type switch and setup two VLANS. This would allow you to expand to more VLANS if you need to. I have a network with 10 Class C and I have two 3550 and it works great.

**NooNoo** · April 22nd, 2004, 04:33 PM

Originally Posted by NooNoo

Then work off that bonus because your collision domain is unmanageable.

No mention of switches - I always assume the worst

layer 1 hubs are alive and well

**Matridom** · April 22nd, 2004, 06:09 PM

i would go with a managed Switch rather then a router, connect the users into smaller groups and use more ports in the switch, change your subnet mask so that it's the same on boths sides. The switch will cut down on the collision domains, so it won't be a big worry. However, on a network of that size, make sure all your data services are working well, both DNS and WINS, cause you still have to worry about broadcast packets.

The "best" solution however would be to get a proper router and make to seprate networks, the above is in case your and a shoe string budget

**biglad999** · April 23rd, 2004, 04:36 AM

Many thanks everyone for your input, i have since, changed the current subnet mask 255.255.255.0 to 255.0.0.0 and changed my scope accordingly to issue 10.0.6.x to 10.0.7.x as one scope which is working but when a client gets issued a 10.0.7.x address it can log in but when you try to view the network places it requires a log-in but wont accept my login as an administrator???? i have even tried splitting the single site down to 2 sites and linking them but still no joy....my head hurts!!!!