Hi Trent,

Thanks for this. Preliminary fiddling with the IGMP options does not appear to 
have any effect.

I'll play with it a bit more before throwing it away and getting a replacement.

Next question: any suggestions on a make/model of modem which IS compatible 
with bonjour service discovery?

Cheers,

Andrew

On 06/11/2011, at 3:21 PM, Trent Lloyd wrote:

> Most likely your wireless is breaking Bonjour service discovery - which uses 
> multicast.
> 
> Check to see if your modem has an option for IGMP somewhere in the settings 
> you can try turn it off/on to fix, if not, you will likely need to purchase a 
> new modem that is not broken (some modem/routers break this feature because 
> they are stupid).
> 
> 
> You'll likely find iTunes music sharing is broken also.
> 
> Regards,
> Trent
> 
> On 06/11/2011, at 3:11 PM, Andrew Schox wrote:
> 
>> Hi all,
>> 
>> We have an ADSL modem/router at our office (a Netcomm NB9WMAXXn, in fact).
>> 
>> We have some Macs connected via ethernet, and some via wireless. In either 
>> case, the Macs get an appropriate IP address from the DHCP server on the 
>> modem.
>> 
>> If I connect my macbook pro via ethernet, I can access printers and use a 
>> little chat app (which uses UDP), but if I connect via wireless, I can't 
>> access the printers or other chat users, although I still can access some 
>> network things (such as our database server, and networked disks). I have no 
>> idea why this is so.
>> 
>> I've checked Netcomm's support site, and have googled myself senseless, to 
>> no avail...
>> 
>> Any suggestions?
>> 
>> Cheers,
>> 
>> Andrew
>> 
>> 
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