Apple MAC Bonjour and Cisco Aironet 1142

Hi All,
   Hope all is well.
   We have a strange issue with our two Aironet 1142s and how it interacts with our Apple laptops. When we try printing to a printer in one room connected to (let's call it Aironet 2) we can't. We attempt to browse using Bonjour (Apple's protocol) to the printer and can't. HOWEVER.. we can print and browse fine when we're using Aironet 1.
   Another strange thing is when we're on Aironet 2 we can ping to the printers just fine, just can't browse to is using Bonjour nor print of course.
Please help! Any inputs appreciated.
-Tom

Natalia,
You need to do the following to make Bonjour printing to work.
Have multicast enabled on the wired side for all the vlans involved (management, ap manager, client, APs). if any of these vlans are not properly setup, then bonjour will not work.
Wired Side:
Router:
ip multicast-routing (enable multicast globally)
For each vlan interface enable ip pim sparse-dense-mode:
conf t
interface vlan x
ip pim spare-dense-mode (there may be a syntax error, dont have router access at the moment)
also you may need to configure a rendevouz point which you can set to layer 3 interface of the management vlan.
For example (management ip 10.1.1.10 and g/w is 10.1.1.1)
ip pim rp-address 10.1.1.1 (again syntax maybe incorrect)
Note: you will have to configure the same on all routers in between the WLC and the APs
Also make sure that the ipads/iphones and wireless printers are connected to the same ssid (same vlan). Bonjour uses link local address which are not routable.
on the WLC, set up multicast multicast mode with a unique mutlicast ip address. Also, on the multicast tab, Controller > multicast > enable global multicast.
There is a catch here. You will mostly likely have to turn off IGMP snooping on the controller (controller > multicast > disable igmp snooping).  I have learnt it the hard way that some of the apple devices dont send the igmp join reports.

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