It sounds like you are real close to getting this to work, we may just be missing something in the configuration.  When you configure the port for VLAN 11, what command are you running? Once it is configured for that VLAN, we can confirm this by simply running a show command on that interface. It may help to see the running config over all, this will help us look for any possible changes we can suggest. If you could give us a rundown or screen shot of the DHCP scope settings, we can help look at those also. Thanks
I recently inherited a Dell PowerConnect 6248 which I'm not that familiar with, and I'm trying to use it as a Layer3 switch. I have a VLAN 10 with an associated network of 10.10.10.0/24 and a VLAN 11 with an associated network of 10.10.11.0/24. When I have statically assigned addresses on clients on ports configured for these VLANs. I can ping other subnets, and traffic is routed properly. I also have IP helper configured globally pointing to my DHCP server, and I have DHCP scopes setup for the networks associated with VLAN 10 and 11. When I connect a device to a port configured with VLAN 10, I receive a DHCP address in the 10.10.10.0/24 network. However, when I connect a device to a port configured with VLAN 11, I receive a DHCP address also in the 10.10.10.0/24 when it should be in the 10.10.11.0/24 network. Both VLANs, routes, and DHCP scopes appear to be properly configured everywhere. Again, when clients use statically assigned addresses for their appropriate VLANs and networks, traffic is routed normally. But I am getting DHCP addresses for the wrong subnet for clients connected to VLAN 11. Any help is greatly appreciated!
PC 6248: Getting DHCP address for wrong subnet.