Ok, I tried searching before posting, but I couldn't really narrow my search terms, so no luck.
I have a couple of vlans 1,9,14 in relation to this issue. For some reason, vlan 9 all of a sudden, the clients are not receiving dhcp offers. The dhcp server is a win 2003 machine on vlan 14. Vlan 1 is functioning fine with the request and offers. I can statically assign an ip on a vlan 9 client and surf the web and ping the vlan 14 dhcp server. I used network monitor on the dhcp server and it did not show vlan 9 requests being forwarded but it showed vlan 1 requests and offers. I deleted and recreated both vlan 9 and vlan 9 dhcp scope. I disabled the acl on vlan 9. I made sure vlan 9 was enabled and the scope activated. No success. I do not have an acl on vlan 14. Im sure more info is needed or output, just let me know. Thanks in advance.
You can create a acl on 4506 to just allow packets from the dhcp server then do a "debug ip packet detail and you can watch what packets are going to and from the server . Also make sure portfast is on your user access ports for the ones you are having trouble with . Maybe post 4506 config and maybe we can see something .
There are multiple reason for this to happen. Its either in the client side, server side, network side. Too many of them to enumerate here, I give you the link instead to follow the step-by-step troubleshooting guide.