Icecast Streaming Media Server

revelator · Joined: 26 Oct 2011 Posts: 10

hi

im relativ new to icecast but im running in a serios problem.

i have icecast installed on a ubuntu 10.04 kernel 2.6.32-33-server
just icecast and ezstream installed on the machine.

the machine is connected by gigabit to the hosters network.
after starting streaming (1 client 128 kbit/s mp3) i run into complete connection losses after 15 - 30 minutes. the loss is about 1 minute to 30 seconds long so most of the connections get lost. (i can't ping the server in this time) after that everthing goes just the normal way, client connects again and so on

i testet the connection with mtr and the connection is gettin lost in the hosters netzwork. we changed nic and switch port an cabels, but the problem is still present. when there is no load on the network i can ping the server for days. without any packet loss at all

the server seams to work normal during offline time logs dont show anything unnormal.

i really can't figure out where the problem might be. anyone else run into something similar? any solotions or ideas what to test?

sorry for my english

karlH · Code Warrior Joined: 13 Jun 2005 Posts: 5476 Location: UK

If things like ping stop working then you need to look at the hardware/driver level. ifconfig can report counts for interface errors, system logs can report odd cases like arp clashes. It's just a cases of trying to narrow the possible causes down. cables are possibility, runs ping tests to the various hops between machines to see which respond and which don't.

karl.

revelator · Joined: 26 Oct 2011 Posts: 10

ifconfig

karlH · Code Warrior Joined: 13 Jun 2005 Posts: 5476 Location: UK

I'd run a tcpdump -nn to see what traffic if any is appearing. With no errors being logged on the interface that would mean not a local problem. you should see at least arp and icmp if you are using ping.

karl.

revelator · Joined: 26 Oct 2011 Posts: 10

i had something like a little break through during the "offline time" the server recorded this data on my network card

karlH · Code Warrior Joined: 13 Jun 2005 Posts: 5476 Location: UK

that looks ok if that IP is your interface. The 33 one will be a other LAN address or gateway. The question is what happens when you try transferring data when there is the outage. Is it completely silent for instance.

karl.

revelator · Joined: 26 Oct 2011 Posts: 10

the 49 is my adress and the 33 is in my network (the X es are all the same)

there is nothing but this "ARP" requests during "outtime" and non of this reguest during normal uptime.

id run the dumb for about 15 minutes. and there was about 1,5 minute downtime in the end.

karlH · Code Warrior Joined: 13 Jun 2005 Posts: 5476 Location: UK

the arp will only occur if you are attempting to access other IPs or they attempt to access you, a ping will be enough to do that. If arp turns out to work during the outage then it has to do with something else. You could try a file transfer (doesn't matter what it is as long as it is a large transfer, ftp,http,scp etc), see what is getting re-transmistted

karl.

revelator · Joined: 26 Oct 2011 Posts: 10

my provider found the solotion

it was a routing problem. the router right before my server seams to forget my servers ip

difficult to find...

karlH · Code Warrior Joined: 13 Jun 2005 Posts: 5476 Location: UK

This is not the first time icecast has been used to expose a network problem. Glad to hear that you got it sorted.

karl.

revelator · Joined: 26 Oct 2011 Posts: 10

@karlH: thanks for the help you gave me the best tip in this problem. cant wait for saturday seeing the server under real traffic Wink

can i send you a beer Wink

we stream first devision basketball games in germany live for about 4 years now an its our first own server Wink

wonderful what you can do if you have all in your hands Wink

www.basketball-stream.de (sorry most is in german)

revelator · Joined: 26 Oct 2011 Posts: 10

400 parallel listeners no problems Wink