Greetings all,
 
We're attempting to enable a number of mDNS advertised services on our campus 
wide wireless network, most notably airplay.  In our case, the airServers would 
sit on our wired network, so we need to advertise the services manually either 
with DNS-SD or mDNS on the wireless side.  We've gotten that working using 
static service advertisements in avahi and it's pretty slick, but we have a 
scaling problem.
 
We have potentially 150 AirServer hosts in a variety of classrooms around the 
campus.  If we were to enable all of them, the list to choose from on iPads 
would be outrageously large (to say nothing of students thoroughly enjoying 
taking over an AirServer from across campus when a faculty member forgets to 
change the password).  
 
What we would like to do is segregate our wireless network on a single vlan per 
building basis to form 27 mDNS segments and then run avahi to advertise the 
services in each segment, preferably on a single, multi homed host with access 
to all of the segments.
 
I was hoping that avahi-daemon would take a parameter in the avahi-daemon.conf 
that points to a unique services directory, so that I could have multiple 
config files, each with a different allow-interfaces clause and a pointer to a 
different services directory, but that doesn't appear to be a configurable 
option.  
 
I was thinking of chroot jailing multiple copies of avahi, but that seems 
really kludgy.  
 
Am I missing some more obvious strategy to handle this without creating 27 
separate hosts?
 
Thanks much!
 
JD
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