I have a really strange problem. I have a F14 box in my closet used as music streaming server, file server and firewall including nat to lan. For streaming music I use Subsonic (subsonic.org) to stream to computer at work as well as my smartphone. This used to work flawless. At some point, don't know exactly when, streaming started lagging.
When I do broadband speed tests I get ~90Mbit (udp) both down and up and 40/20 tcp. But as soon as I start streaming mp3 with bitrates around 192Kbit it starts lagging like crazy.
- I have checked CPU: never over 10%
- I have used wireshark and can see quite a few retransmissions of tcp traffic to the client
- I have tried without iptables -no luck
I am kind of stuck here. I do know a little about Linux networking, but in this case I don't know where to start looking for faults. Could it be hw-related? nic broken? But in that case, why do I get such good speeds when doing speed tests? The retransmissions bothers me. Is there a way to check why these occurs?
Forgot to mention: If I stream locally on my lan, everything works like a charm. But that is of course on another nic.
Any input welcome!