DHCP Query

[LeightonJames]

Hi guys

 

Been asked to help reconnect some devices in an office that had been moved from one floor in the building to another. These devices are part of a mini network and connect to the internet through a shared Internet connection for the entire building. Obviously they are getting DHCP addresses from the building's DHCP Server be that an actual server or a router, I'm not sure, but there was an issue with some of the machines not being able to see the DC once everything had beren reconnected.

 

In all honesty, it's a mess. I'm going back in a few weeks to flatten the whole thing and start again. I was thinking of setting up DHCP on the DC but then realised I wouldn't be able to becuase of the uplink to the building. I don't want random clients getting a DHCP address from the DC. I'd rather not statically assign addresses if I can help it but not sure I have much of a choice. Anyone come across similar issues?

 

As far as I can tell they do not have Managed Switches so VLAN's are out of the question. They are running VOIP system but I'm not sure how this is configured. I was only asked as their usual go to guy was unavailable.

[eddyc]

If the server has two NICs you could potentially let one NIC DHCP from their shared connection.

 

Use the second NIC for internal office comms and configure DHCP on that NIC in a new IP range. You could then essentially route via the server for client internet access

[LeightonJames]

Cheers eddyc

 

I'll look into that when I'm back on site. One thing I did notice now that you mention 2 NIC's, the server does have 2 physical NIC's however one of them doesn't appear to be working and there is a Virtuial NIC installed. When I tried to set an IPv4 address on the 2nd NIC it told me that a network card had to be installed. Like I said the whole system is a mess.

 

There is ZERO structure to the network, no naming convention to speak of. There are a dozen empty OU's all in the root of the Domain. Checking GP showed me similar issues with duplicated empty GPO's.

 

I nearly vomited when I saw the state of the domain.