New DHCP Scope not assigning IP to VLAN

[JiLi]

Hi

We have 7 HP Procurve Switches around the building, and 1 DHCP windows server 2008.

On server 2008, there are already 8 dhcp scopes. On Switches, there are 8 VLANs pointing back to DHCP server with ip helper-address 10.89.31.6.

Problem is:

On the server 2008 DHCP, I created a new scope:

NEW-WIFI

IP Scope: 10.89.41.5 to 10.89.41.250

subnet mask: 255.255.255.0

Gateway: 10.89.41.1

On the core switch, I created vlan 70:

VLAN 70

name “NEW-WIFI”

ip helper-address 10.89.31.6

ip address 10.89.41.1 255.255.255.0

tagged 44-48

exit

On one of hub switches, I created vlan 70 also:

VLAN 70

name “NEW-WIFI”

untagged 40

tagged 45-48

no ip address

exit

Then I plugged a device in, it’s not getting ip address from dhcp.

Where did I do wrong?

Many thanks in advance!

Ji

[16again]

1st step is checking routing

Can server2008 ping the new VLAN interface 10.89.31.6  ?

[JiLi]

10.89.31.6 is the windows dc server itself.

From the server, I can ping 10.89.41.1 which is the gateway of the new scope and ip address for new vlan.

But my laptop or WAP just not getting any IP assigned.

[JiLi · Accepted solution]

Found the problem.

The switch I tested with was not connected to core switch directly. But via another switch in a different hub room.

New VLAN was not setup on that switch, although no port was used.

Had to create vlan on all switches and it is working now.

Cheers

Ji