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Windows 2003 DHCP with VLAN

Windows 2003 DHCP with VLAN

Windows 2003 DHCP with VLAN

   Currently we have our DHCP running on Cisco Core Switch and I am planning to move it to Windows 2003. I was testing but I cannot get through. It would great if someone can point out what is going wrong.

Windows 2003 DHCP installed. (
6 scope:

Cisco Catalyst 4948 with five vlan configure.
Vlan 102
Vlan 103
Vlan 104
Vlan 105
Vlan 106

I am using DHCP IP Helper so that users on Vlan 102 will get ip from scope
But it's not working out for me.

If i connect the client to a port which i a member of default vlan then it gets the ip from the scope

But if i use port with vlan 102.. it not getting an ip from scope Well it fails to get an ip.
My DHCP ip helper has ip of the DHCP server But that seems not to work.

I assume we need a route in this case.. but i guess a 3rd layer swtich would work, right?
Anyone can please tell me what should I do.?

Thank you,

RE: Windows 2003 DHCP with VLAN

I dont know much about this other than the 20 odd MS exams but would  you not have to enable BOOTP, and BOOTP broadcast forwarding to the DHCP server.


RE: Windows 2003 DHCP with VLAN

Yes, I did try that. But no luck.
I cannot find much documentation about it anywhere.
All i got was to use ip helper with DHCP ip address and i should be good. But it does not work for me ):

RE: Windows 2003 DHCP with VLAN

Verify that you applied the ip helper command on each vlan interface.

M. Knorr


RE: Windows 2003 DHCP with VLAN

Yes, I have ip help for all the vlan's.
I guess i have done some silly mistake somewhere.

When i configure my client with static ip from any of the scope and change the port to the right vlan. it seems to work. I can ping all around. But for some reason I am not getting ip from DHCP for other scopes.

This is what i have on my Cisco L3 switch. Do let me know what you guys think.

interface GigabitEthernet1/1 (Connected to the DHCP Server)
 switchport mode access
interface GigabitEthernet1/2
 switchport access vlan 102
interface GigabitEthernet1/3
 switchport access vlan 103
interface GigabitEthernet1/4
 switchport access vlan 104

interface Vlan102
 ip address
 ip broadcast-address
 ip helper-address

interface Vlan103
 ip address
 ip broadcast-address
 ip helper-address
interface Vlan104
 ip address
 ip helper-address

Thank you,

RE: Windows 2003 DHCP with VLAN

Verify the DHCP has connectivity to each of the VLAN interfaces on the catalyst switch - it may just be a routing issue?

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