On Thu, Apr 09, 2009 at 11:02:06AM +0200, Bjoern Koenig wrote: > 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. >
I think you're right. Thanks a lot! _______________________________________________ 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"
