External DHCP Server setup

[e_q]

I have a ZD5000, and trying to configure a AP to get ip from a NEW external DHCP server (Win2003 or Win2008). AP is currently working fine and receiving DHCP for another OLD external DHCP server (L3 switch). AP port is tagged with VLANs 7&8, VLAN ID is 8. NEW DHCP server sits on VLAN 9 but I have configured a scope on the server to hand out address in the format: xx.xx.8.0/23; OLD DHCP server sits on VLAN 7 and hands out xx.xx.7.0/24. ZD is set with a static ip: xx.xx.7.x/24 (VLAN 7). Both DHCP servers will remain as I have other APs on the old and serves different purposes. I just need this one AP to hand out address the would put those devices on VLAN 8 thus the scope setup on the new server. How do I configure?

[michael_brado]

Adding to Ramprakash's comment.  Trunk VLAN 8 to your APs, and clients who connect to a WLAN tagged for VLAN 8, will have their DHCP requests tagged before they hit the Ethernet at the AP.

[eizens_putnins]

1. Adding to proposed solution -- you still need to add new DHCP server to DHCP relay config, as it is providing IP to VLAN8, but sits on VLAN9, otherwise clients will not get IP addresses.

2. Much better way to replace VLAN for SSID on any AP is to create new AP group,  set for group VLAN substitution to 8 for respective WLAN and move needed AP to this group.

Hope it helps,

Eizens