Can wired and wireless clients use same VLAN on WLC 2106?

Unanswered Question
Dec 4th, 2007

My setup is basic with ap-manager and management interfaces both untagged and two dynamic interfaces on VLANs 1 and 2. The WLC2106 is connected to a L3 C3560 through a dot1q trunk native VLAN 4. Ap-manager and management interfaces are managed from VLAN 4 with no problem. VLANS 1, 2 & 4 are on different IP subnets. Problem is I need to use a RADIUS server on VLAN 1 but the WLC can't ping the server on VLAN 1.

I have seen similar queries which do not give a definitive answer e.g. http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Wireless%20-%20Mobility&topic=Getting%20Started%20with%20Wireless&CommCmd=MB%3Fcmd%3Dpass_through%26location%3Doutline%40%5E1%40%40.1ddf8d3e/3#selected_message

I have this problem too.
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ccbootcamp Tue, 12/04/2007 - 07:43

If the post you are referring to is correct, then I would lean towards NO as an answer to your question and recommend a routing solution between your VLANs. Can you handle the routing between the VLANs on the L3 C3560 so the WLC can get to it?

-brad

www.ccbootcamp.com

(please rate the post if this helps!)

cit-london Tue, 12/04/2007 - 08:11

Brad, routing is already enabled on C3560. Actually according to docs I've seen (& packet capture on trunk) when you ping a device on the wired LAN from the WLC, the source address is that of the dynamic interface. So it means there is really no routing because the dynamic interface & wired device are on same subnet. I actually suspect this is the root of the issue i.e. arp requests at the switch end not getting onto the wired VLAN.

ccbootcamp Tue, 12/04/2007 - 08:33

Can you stick another NIC on the radius box? Put it on the same vlan as the WLC wired network with an IP in the dynamic interface's subnet.

Kind of a bandaid, but it should work.

-brad

www.ccbootcamp.com

(please rate the post if this helps!)

cit-london Tue, 12/04/2007 - 08:41

I really would like to avoid any solution that requires creating additional subnets. If all fails I'll have to set up different subnets for wired and wireless clients. I just wanted to get absolute confirmation that wired & wireles clients can't be on same VLAN before exploring more painful options. Thanks for trying to help.

ccbootcamp Tue, 12/04/2007 - 08:45

I ran into a similar problem myself with my 1811W. Different scenario than the one you are doing, but same outcome.

-b

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