Date: Thu, 10 Jun 1999 16:53:12 -0400 (EDT) From: Adon <ahwang@fas.harvard.edu> To: Changhoon Kim <kimch@etri.re.kr> Cc: Steve Madsen <steve@dvart.com>, FreeBSD-net@FreeBSD.ORG Subject: Re: Poor TCP performance between 2.2.5 and 2.2.8 Message-ID: <Pine.OSF.4.04.9906101652390.5140-100000@ice4.fas.harvard.edu> In-Reply-To: <375F7785.4CE97576@etri.re.kr>
next in thread | previous in thread | raw e-mail | index | archive | help
if there were any routers running freeBSD, you should probably turn off icmp source-quenches on them. adon On Thu, 10 Jun 1999, Changhoon Kim wrote: > Though this mail seems not to help Steve, I've experienced similar situations > before. > And I've already consulted this situation to this mailing list. > > I used two FreeBSD 3.1 machines(with SMC EZ Fast-Ethernet NIC) and one Redhat Linux > 6.0 machine(with the same NIC). These three machines were attached to a > fast-ethernet segment. Under this configuration, when I transmitted files from > either of the FreeBSD box to the Linux box, transmission speed was over than > 70Mbps. However, when it came to the transmission between the two FreeBSD boxes, I > did not observed transmission speed surpassing 50Kbps ! > > I've tried to solve this problem for about two weeks but in vain. > Currently, I've upgraded both FreeBSD machines into 3.2-Release and the awful > transmission performance problem has been completely vanished ! > But, I'm still in curiosity. > > Any good ideas, suggestions or comments ? > Thanks folks. > > Steve Madsen wrote: > > > I realize this may be not very important since work is mostly being done on > > 3.x and 4.x these days, but I observed some really poor TCP performance > > between a 2.2.5 box and a 2.2.8 box the other day. I was using scp to copy > > a large files (80-some MB) from the 2.2.5 box to the 2.2.8 box. Not only > > was performance bad, but the 2.2.5 box actually had trouble servicing X > > sessions to other people. Their X sessions timed out and went away. Other > > than this transfer, the LAN was lightly loaded. > > > > I'd have to go back and try this again to get solid data, but I was curious > > if anyone had seen something like this in the past. I searched the mailing > > list archives and didn't find anything related. > > > > The 2.2.5 box has a 3Com EtherLink III and the 2.2.8 box has a 3Com 3c905 IIRC. > > > > Using a Linux machine as a middleman worked around the problem; the 2.2.5 > > box had no problem sending a huge file to the Linux machine and the 2.2.8 > > box had no problems receiving the same large file from the Linux box. The > > problem was limited to the two machines talking to each other. > > > > -- > > Steve Madsen <steve@dvart.com> > > Digital Video Art, Inc. > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-net" in the body of the message > > -- > ========================================================== > Changhoon Kim > > Internet Technology Research Dept. Switching & Transmission Technology Lab. > Electronics and Telecommunications Research Institute(ETRI) > > 161 Kajong-dong, Yusong-gu, Taejon, 305-350, KOREA > Tel: (Office) +82-42-860-5801, (Cell) +82-19-226-6305 > E-mail: kimch@etri.re.kr > > * All Smiles, Everywhere and Everytime ! > =========================================================== > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-net" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.OSF.4.04.9906101652390.5140-100000>