Window Server 2012 DHCP server is currently configured as:
- Subnet: 10.0.
- Dynamic IP Range: 10.0.0.
This is done to limit dynamically assigned addresses to a small range on the subnet (and not overlap into other ranges).
I would like to add another address range to pool of available ranges that DHCP can pull from on our
DHCP Address Pool
Of course you can't do that because:
Of course it doesn't conflict; it's just being stubbon.
I want the DHCP server to offer addresses from a pool of two ranges on the 10.0.x.x subnet:
DHCP Address Pool
How do i do that?
i suppose i could do it with exclusions:
- Range: 10.0.0.0 - 10.0.255.255
- Exclude: 10.0.0.0 - 10.0.0.11
- Exclude: 10.0.0.151 - 10.0.0.255
- Exclude: 10.0.1.0 - 10.0.26.255
- Exclude: 10.0.27.0 - 10.0.27.11
- Exclude: 10.0.27.151 - 10.0.26.255
- Exclude: 10.0.28.0 - 10.0.255.255
But that idea is so dumb that I won't even bring it up.
- How to add extra range of IP in DHCP of Windows Server 2008 R2 (archive)
- Adding another IP Range to DHCP (archive)
- KB255999 - Increasing the number of IP addresses on a subnet in DHCP Server
How does DHCP work?
Dynamic host configuration protocol can be used to automatically configure network devices with information they need:
- Network subnet mask (e.g. 255.255.0.0)
- DNS server (e.g. 10.0.42.7, 10.0.13.29)
- Domain name (e.g. stackoverexchange.com)
- Default gateway (e.g. 10.0.241.1)
In addition to being able to configure host options, it can automatically give clients an IP address. The DHCP server is given a block of IP addresses it can assign to clients, e.g.:
And when a client shows up needed an IP address, it looks in it's available pool of addresses, picks one, and gives it to the machine:
- 10.0.0.12 - Unassigned
- 10.0.0.13 - Unassigned
- 10.0.0.14 - Unassigned
- 10.0.0.98 - Unassigned
- 10.0.0.99 - Unassigned
- 10.0.0.100 - Unassigned
- 10.0.0.200 - Unassigned
- 10.0.0.201 - Unassigned
- 10.0.0.202 - Unassigned
- 10.0.0.243 - Unassigned
- 10.0.0.244 - Unassigned
- 10.0.0.245 - Unassigned
- 10.0.3.100 - Unassigned
- 10.0.3.101 - Assigned to de-ad-be-ef-ba-ad (IANBOYD)
- 10.0.3.102 - Unassigned
- 10.0.3.198 - Unassigned
- 10.0.3.199 - Unassigned
- 10.0.3.200 - Unassigned
I want to add more ranges of IPs to the available pool of IPs to be assigned.
Other DHCP servers do it
Of course other DHCP servers can do this:
But i already know how to do it in other DHCP servers. I'm asking how to do it in the DHCP server that ships with Windows Server 2012.
If Windows Server 2012 DHCP server cannot do it: it's ok to say it:
It cannot be done; Windows Server 2012 does not support this feature that other DHCP servers support.
But i'm hoping it does support it. DHCP has been around a long time; and Microsoft has had a long time to get it right.