DHCP Server + VLAN Solved

Question

Hello,
I am currently in a BTS IG program and for a PTI, I decided to set up 2 VLANs (VLAN2 and VLAN3); and,
the computers on these VLANs will be automatically assigned an IP address via a Windows Server 2003 DHCP server.
So I see it like this:

VLAN2: Administration VLAN which will contain several workstations + The Windows Server 2003 DHCP -> Ports 17 to 20
VLAN3: Public VLAN which will also contain several workstations -> Ports 21 to 24

DHCP Configuration:
VLAN2 Scope: 192.168.100.1 to 192.168.100.99
VLAN3 Scope: 192.168.200.1 to 192.168.200.99

So it is one VLAN per port.

I would like to know how my DHCP Server can assign its VLAN2 scope to my VLAN2 and its VLAN3 scope to my VLAN3.

My switch is an Allied Telesyn AT-8024 (@IP:192.168.10.3) and I configure it using HyperTerminal.

Thank you =)

Configuration: Windows Vista Windows 2003

brupala · Accepted Answer

Hello,
it can be done in two ways:
either your server has a connection to each VLAN, in which case it happens automatically.
or your server is in a single VLAN, then it’s the router (or L3 switch) connecting the two VLANs that must integrate a DHCP relay to forward the DHCP discover requests to the server's VLAN.
The DHCP relay automatically adds information indicating to the server that it must provide an address within the range of the other VLAN.
--
and... There you go!

lanocm · Answer

Hi I don't know if the configuration on the Cisco switch is the same as on your model. --  I want to learn.

bec56 · Answer

Thank you both for your answers ;)  Lanocm, unfortunately my switch doesn't work like a Cisco, otherwise I think I could have found a solution =P But I only have an Allied switch, a sub-brand (provided by my school ^^)  Brupala, thank you for your response. I think I'm going to add a network card to my DHCP server, one will be connected to VLAN2 and the other to VLAN3. So after that, I'll just need to figure out how to assign the ranges to the network cards ;)  But I'm going to try the DHCP relay trick anyway. I didn't really understand how to set it up and how it works, could you tell me a bit more about it please? =)   I also have another question, I have a cable that I need to connect to my switch, this cable corresponds to the internet access; what should I do for each VLAN to benefit from this connection?  Thanks =D

bec56 · Answer

Well, I'm going to go for the solution of 2 network cards for my DHCP server.

My question now is as follows: How do I assign the first DHCP address pool to one network card, and the other pool to the second network card?
I remind you that I am on Windows 2003 Server.

If you could explain this to me or point me to a tutorial that explains it, it would be of great help!

Thank you for your upcoming responses :)

bec56 · Answer

Sorry for the delay, Thank you very much brupala, it worked perfectly ;) Thanks for your advice :P

DHCP Server + VLAN

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