Apparently we're doing something wrong. We noticed a lot of UDP traffic over the WAN, and realized all the APs were going back to the controller for their reporting instead of using a Domain manager and letting it do the talking. At least, that's my understanding of how it's supposed to work. We're doing this with the assistance of the vendor and for some reason they're stumped too..
At any rate, the network and the access points out there are on VLAN 8, so that's what I put in the "VLAN for Control Traffic" setting.
The controller reports the following:
RMC-RFS7000>show noc domain managers
--------------------------------------------------------------------------------
RF-DOMAIN MANAGER HOST-NAME APS CLIENTS
--------------------------------------------------------------------------------
... <snip> ...
Canyon-Springs 5C-0E-8B-97-CD-F4 RMC-CS-AP16-CD:F4 32 50
... <snip> ...
RF-DOMAIN-RMC-DC 5C-0E-8B-1A-08-A2 RMC-RFS7000 3 24
--------------------------------------------------------------------------------
RMC-RFS7000>sho mint links on RMC-CS-AP1-29:F4
2 mint links on 0B.1A.08.A2:
link ip-10.10.1.50:24576 at level 1, 1 adjacencies
link vlan-8 at level 1, 31 adjacencies, DIS 0B.97.D5.7A
RMC-RFS7000>
I thought maybe we hit a limit because there's more than 24 access points at this site, but I just tried it at a site with 8 with the same result, so I'm probably just missing something basic in my config. These things are stuck in Level 1 MiNT and not going into Level 2 it looks like to me..