Do I really need to add a DHCP relay agent to this subnet - based on this situation?

[PeeluckyDuckee]

Ok. I have 3 subnets (or as the exam says ). There's one DC, lets call it DCA, on SubnetA. DCA's roles are RIS Server, DNS, and AD.

SubnetB contains another DC, DCB, and his role is simply DHCP Server.

Now on SubnetC are a whack of new W2KPro-to-be PCs that have PXE-boot nics. They can't contact DHCP Server for an ip address assignment. Why? Because the router is not 1542-compliant.

So I would need a DHCP relay agent, correct? But do I simply need one on SubnetC where the new computers reside? Or do I need one on SubnetA as well?

My guess is that I would only require a DHCP relay agent on subnetC to accomplish the task of installing OSes onto the new computers?

Thx for the help.
Plucky

 

[loosbrew]

you will only need a relay agent on the sugment that cant access the dhcp server. the relay agent will be configured to send the brodcast based requests as unicast packets directly to the dhcp server, and the dhcp server will return it directly to the dhcp relay agent which will in turn return the info to the clients. you dont need two dhcp relay agents.

loosbrew

also if the client pcs will continue to use dhcp, you will need to keep the dhcp relay agent on that segment to continue the deliverence of the ip info.

 

[Garion]

You'll need a relay agent on the ROUTER that connects subnets A&C or B&C (or all three). That's really the only way to do it, unless you do something wild like put two NIC cards in DCA or DCB, one on it's main subnet and on one Subnet C.

You will need a DHCP server to do more than install - Any box that needs a dynamic IP address at any time (install and normal use) will need to get it from a DHCP server.

- G