OT: WLC & ARP

I have been searching on this topic for a while but can't find a specific
answer. Does anybody know how a Cisco WLC handles ARP broadcasts for
wireless clients? Let's say a user on the wired network wants to talk to a
wireless client. You have a WLC connected to a L3 switch somewhere in your
infrastructure and several LWAPs. The packet gets routed to the L3 switch,
and the L3 switch has a directly connected L3 interface for the client where
the WLC lives. At this point the L3 switch does an ARP broadcast to find
the MAC address of the wireless client. That broadcast gets to the WLC --
Now what?

It doesn't seem to make sense that the WLC would forward the ARP broadcast
over an LWAP tunnel to EVERY access point and that the access points would
then forward it to every client. So, what happens? Is it some sort of
proxy arpish type thing the WLC does? Things I have read so far seem to
indicate that the WLC answers the ARP request with the MAC of the client, as
it knows the MAC from when the client associated with the remote AP but I
can't find anything that specifically confirms this.

Anybody know? Looking on my L3 switch connected to the AP, it definitely has
all the IP/MAC pairings of the wireless clients I'm just wondering how they
got there. Thanks!

-- 
Regards,
Joe Astorino
CCIE #24347
Blog: http://astorinonetworks.com
"He not busy being born is busy dying" - Dylan
Blogs and organic groups at http://www.ccie.net