Network activity from Receiver

I posted a note about this over on the empeg BBS, but I figured I should probably post it here.

My receiver occasionally gets into a situation where it begins sending 12KB of data a second to my computer. I can see this through my bandwidth meter. I tried shutting down the audio manager software, but it continues to send the data anyways. The only way I can stop it is to disconnect the ethernet cable.

Anybody know what data would be getting sent? I'll try to reproduce it, but I'm not sure how I get into the state.

If you do manage to reproduce it, see if you can capture it in a network trace program.

My first guess is that the DHCP server is issuing IP addresses with really short leases.

Ok, I ran Ethereal when I received this problem again. It's sending two DHCP requests to 255.255.255.255 every .1 seconds. I'll attach a screen capture from Ethereal.

Perhaps I have my network settings incorrectly set? I have a DSL/Cable Router, and I have the Audio Manager set to Auto Configure. It's set as:

First address: 192.168.2.129
Last address: 192.168.2.254
Network Mask: 255.255.255.0

Thanks.

Hmmm. Are you using the Audio Manager's DHCP server, or another one?

It looks like the Receiver thinks its got a really short lease, and so it's asking for a new address. However, the server won't respond until the "seconds" field in the request reaches some non-zero value (5, IIRC).

There's either a bug in the DHCP server that meant it handed out a really short lease, or in the Receiver that meant it parsed the response incorrectly. Also, the Receiver shouldn't send out the request more than once per second, anyway, so something's wrong there.

Does this happen often? Presumably you've tried power-cycling the Receiver?

The Receiver is plugged into my Router which has it's own DHCP server. So the Receiver is using an IP that was assigned to it by the router. What's kind of strange is that the DHCP requests are all being sent to my computer which is running the Audio Manager, not the router itself. Does this mean I should disable the auto-configure on the Audio Manager?

It seems to get into this state a little after I stop using the Receiver and turn it off. If I unplug the Receiver and plug it in again, it stops until the next time I use it.

Yeah, try turning off the included DHCP server. If that doesn't work, can you capture any of the original DHCP conversation -- i.e. where the Receiver first gets its lease? I suspect that your router might be sending malformed renewal responses, and we're not handling them correctly.