OK, I'm confused. Do you have a diagram? It is my understanding that the IP Helper feature is used to relay DHCP requests from clients in one subnet (VLAN) to another subnet (VLAN) where the DHCP server resides. From this configuration it looks like your ip helper statement is pointing to an address which is in the same subnet as your client(s).

You need to have the ip helper statement on the VLAN interface which has the default-gateway IP for the clients which you are trying to configure for DHCP.

Ok. So I know 192.168.1.1 passes out ip addresses for 192.168.1.x addresses. So should it be my ip help-address? I have a scope setup for 192.168.6.x

192.168.1.1 as a helper does not work.

See attached.

By the way my router is the DHCP server. It has a scope for the 192.168.6.x network.

might want to check out that acl and see if it is blocking dhcp request on the .6 subinterface on the router. Also verify your trunk between the 3750 and the router is working correctly. You can harcode a address on a workstation and verify you can ping both router subinterfaces , if not trunking probably is not working correctly. Not sure if you would need a helper address or not seeing the router itself is doing the dhcp as ooposed to a server . This might help for router setup .

http://cisco.com/en/US/products/sw/iosswrel/ps1835/products_configuration_guide_chapter09186a00800ca75c.html#wp1000879

I just removed it. Which ip forward address would you recommend? 192.168.1.1?

One more question. Are you doing any routing on the 3750, or is all the inter-vlan routing taking place on that other router?

Do you mind posting configs for both devices?

I have an idea, but would need to look at the configs to confirm.