2 DHCP servers 1 ran out of ips other hasnt

[kevin_lane]

we have 2 dhcp servers 1 of them have ran out of ip address but our other dhcp server has 70 address free why isnt some of our clients getting the lease from the second server:confused:

[DAckroyd]

why do you have 2 DHCP servers rather than 2 ranges on the one server or even just one big range?

are the 2 servers attached to the same network as each other and the clients not getting their IP's?

[tmcd35]

why do you have 2 DHCP servers rather than 2 ranges on the one server or even just one big range?

 

In case one DHCP server failed? On a network of physical machines I'd personally prefer two or three seperate DHCP servers each controlling a portion of the range to one server that can go belly up and take the whole network with it.

 

These days though I live in a VM world and really there is no need to have more than 1 DHCP server. If the physical machine dies the VM can be quickly/automatically restarted on other hardware.

[kevin_lane]

yea it starts from 10.25.8.x till 10.25.9.x on the same server but on the second server we have 10.25.10.x to 10.25.11.x their is some clients that have this range 10.25.10.x to 10.25.11.x and their are clients that get 10.25.8.x till 10.25.9.x but now on the server that has 10.25.8.x till 10.25.9.x has ran out and now its not taking any from 10.25.10.x to 10.25.11.x this is my nm idea if it was just me i would have them distro from 1 server makes life easyer i think

[DAckroyd]

try taking it down to 1 server and have it as one range (make sure your subnets are correct) and see if that helps - just disable the old ones in the background

[dwhyte85]

Hello,

 

If it's run out, you might want to shorten the lease times, might be that you have several addresses that are 'in use' but not really in use with either of the 2 servers.

 

It might make more sense to make the scope include all the addresses on 1 server, like DAckroyd has said.

Edited March 25, 2009 by dwhyte85

[tmcd35]

If you're changing/checking your DHCP lease time it worth also checking your DNS Scavaging and Aging settings at the same time. Make sure they are in line with the DHCP lease time and are working. Don't want stale DNS records or Bad IP addresses compounding the problem.