pyu...@gmail.com wrote: > If you can easily reproduce the issue, can you capture stalled TCP > session with tcpdump on receiving host?(Make sure to disable Rx > checksum offload prior to capturing the session.)
I transferred a 256 kiB file and these are the tcpdumps: http://www.alpha-tierchen.de/~bkoenig/fxp0-with-tso.txt http://www.alpha-tierchen.de/~bkoenig/fxp0-without-tso.txt Actually the transfer doesn't stall although ftp and scp told me so. It becomes incredibly slow. It seems like that the chunks are too large and a smaller packet will be resent. I decreased the MTU from 1500 to 1492 and it works fine with TSO enabled. I also captured the traffic on my router: http://www.alpha-tierchen.de/~bkoenig/fxp0-with-tso-router.txt http://www.alpha-tierchen.de/~bkoenig/fxp0-without-tso-router.txt It reveals a suspect information: "truncated-ip - 8 bytes missing!" I almost suppose that this is a PPPoE-related configuration issue and the fxp driver is not necessarily the problem since decreasing the MTU of the LAN host solves it. Björn _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
