We are just getting started with a 5508 WLC and WCS. We can already see this is a big improvement over our present setup with autonomus AP's. We are also implementing some 11n AP's as part of this.
I think I understand the multiple AP-manager interfaces and the way AP's load balance over these. But I dont understand the way the client traffic should be load balanced.
The goal is to have one WLAN. When I create this I select a dynamic interface (and thus a VLAN for the clients). But this VLAN is bound to a physical port (with a backup port). So from my understandig the client traffic wil go from the AP's to the controller on multiple interfaces, but from then on will go out to the servers on just one interface?
Thats not what I want - I would like the traffic out on the VLAN to the servers to be distributed on more than one port. How do I do that? Do I then have to use LAG?
If the buildings are close enough to cause a roaming event, the client will maintain it's previous address and remain on the previous VLAN i.e. a layer 3 roam will take place. If it takes more than the User Idle Timeout (default 300 seconds) to move between buildings, there will be no client table entry in the WLC so the client will get a new address and be put in the new VLAN.
So, a roam should not take any longer, but you will see clients in building B with addresses from building A and vice versa if a client takes less than 300 seconds to move between buildings.
And yes, LAG between multiple switches in the same stack is supported.
Correct, if you only have one WLAN you probably would only have one dynamic interface, unless you are using AP Group VLANs.