I've been running 8-hour+ traffic runs on RTL-8139 10/100 ethernet cards connected by a 10/100 etherswitch and linux-kernel 2.2.14 <-> 2.2.16. I'm using three cards in each machine, one for mgt, and two others for data generation/testing. I use the ip command to set up source-based routing policies to direct the ethernet traffic out over the correct port. I'm running 4 Mbps of raw ethernet traffic, full duplex, 500Kbps of UDP traffic, and two 56Kbps TCP/IP connections. After about 6-8 hours, the IP connections stop transmitting traffic. I'm not completely sure whether the connection is actually broken or whether it just stops passing traffic.... I'm still looking into that... Sometimes the receive queue, as shown by netstat is very full, but the TX isn't (My program should be select'ing and pulling off that incoming data...) I find it interesting that when the TCP/IP is locked up, UDP and raw ethernet continue to flow just fine. I also telnet'ed into the LISTENing port, and it connected me just fine. I was able to get traffic running again by bouncing the Ethernet ports up/down with ifconfig and ip (to set up the source-based routing). Anyone know of any significant kernel problems with 2.2.14 or 2.2.16 that might cause this? Any other ideas?? When the system is in it's hosed up state, I see this on the side that is trying to connect to the other: [lanforge@card1 lanforge]$ netstat -an | grep 200 tcp 0 1 192.168.10.111:4730 192.168.10.211:20011 SYN_SENT tcp 0 1 192.168.10.111:4729 192.168.10.211:20010 SYN_SENT tcp 0 1 192.168.10.111:4725 192.168.10.211:20006 SYN_SENT Here is what the server (accept) side looks like: [lanforge@candle lanforge]$ netstat -an | grep 200 tcp 0 0 192.168.10.211:20011 0.0.0.0:* LISTEN tcp 0 0 192.168.10.211:20010 192.168.10.111:4729 SYN_RECV tcp 0 0 192.168.10.211:20010 0.0.0.0:* LISTEN tcp 0 0 192.168.10.211:20006 0.0.0.0:* LISTEN (I've seen where all three were in the SYN_RECV state, just didn't get a trace..) Thanks in advance for any ideas! Ben -- Ben Greear (greearb@candelatech.com) http://www.candelatech.com Author of ScryMUD: scry.wanfear.com 4444 (Released under GPL) http://scry.wanfear.com http://scry.wanfear.com/~greear - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.rutgers.edu
