I'm in the process of testing a new network environment that uses L3 routed connections instead of L2 trunks. I plan to use L3 routed links all the way to the access layer.
My existing environment consists of a variety of Cisco switches; all connected with L2 trunks. L2 trunks are used between the core and distribution, distribution and the access layer and between access switches as well.
My new environment will use 3550-12Gs at the distribution layer, connected to the core with L3 routed links. 3550s and 3560s will be used at the access layer, connected to distribution with L3 routed links. Each wiring closet will have 3 dedicated VLANs which are only available in that wiring closet.
I have this new topology set up in a test environment (diagram attached) and it works great. Client workstations are able to get IP addresses via DHCP, access to my production network is working and routing works fine.
My problem began to surface when I began to test my wireless APs. My wireless test client associates to the AP just fine, but DHCP does not work. My ip helper-addresses are set up correctly (I believe!). On the AP's con0, I am able to ping my DHCP server (and elsewhere on my production network), but client connectivity does not work.
My wireless network uses autonomous APs - I do not yet have LWAPP, WCS, etc. On all my APs (a mixture of 1231Gs and 1242Gs - 61 of them in total), I use the same wireless VLANs (140-145) to service my entire campus. This, of course, allows client workstation mobility. From the reading I've done here, it seems that the problem is the fact that my VLANs on the AP need to span across multiple wiring closets. Creating six wireless VLANs for each wiring closet is a non-starter. In addition to the wireless VLANs, I have a 'guest' VLAN (for wired 'guest' workstations), a 'pseudo-server' VLAN and a 'test' VLAN that span all switches on my network.
So... am I stuck? Can I move to L3 routed links throughout my campus network *and* keep my wireless, test and guest VLANs? If I *really* have to, I can kill off the guest, pseudo-server and test VLANs, but there's no way I can get rid of the wireless VLANs.
I'm almost sick to my stomach thinking of all the work I've already done and the possibility of not being able to move forward with L3 routed links...
Please help! :)