DHCP server IP address ranges

[copterride]

Hi,

Customer have given us the following IP address ranges,

Telephony Servers- 10.60.130.18-10.60.130.254 VLAN-154
Network Management- 10.60.34.18-10.60.53.254 VLAN-38
IP Phones- 10.60.82.18 - 10.60.90.254 VLAN- 80

We have 1 duplex CM, 9 G450 gateways,650 IP phones, DHCP/DNS/HTTP server(all in one),CMS and AIM servers.

I know Data VLAN is 38 and Voice VLAN is 154 but confusion is,

Which IP address and VLAN i use for DHCP server, from Telephony servers or Network management? What IP address range i assign in DHCP server for phones to aquire IP address, I assume the IP phones range, but i see lot of subnets from customer for 650 IP phones. why so many subnets?

Also i need IP address for UPS.

Thanks.

 

[LeeMason]

It looks from the phone range given that the subnet for the phone network will be 255.255.224.0 (if they are all in the same subnet). This will encompass the phone ranges required. Is that correct? The phones may also be in different subnets (say for each floor of a building, etc). Ask the customer what the subnet or subnets should be.

What I would do personally is to put the DHCP server in the management VLAN. Then on the LAN I would add a Helper Address in on the network switches in the phone VLAN settings to point all DHCP requests to the IP address of the DHCP server. Then you need a scope on the DHCP server which covers the subnet 10.60.80.0/255.255.224.0. Set the scope to 10.60.82.18-10.60.90.254. The way you set the IP helper address depends on the switches that you are using.


Lee Mason
Optimal Projects Ltd

http://www.opl.co.uk

http://www.backupsanywhere.com