Date: Sat, 15 Jul 1995 18:04:16 -0600 From: WOOD JAMEY RYAN <woodjr@durrance.Colorado.EDU> To: questions@freebsd.org Subject: NE2000-compatible losing packets on 2.0.5R Message-ID: <199507160004.SAA08090@durrance.Colorado.EDU>
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I'm having problems with an NE2000-compatible ethernet card on a 486 dx2/66 with 8 megs ram running FreeBSD 2.0.5-RELEASE. The machine's local net is thinnet, and has several Suns in the immediate lab. From there, our net connects to a Cisco 7000 that connects us to the outside world. The machine's network performace is fine to/from the suns. Its pings to the cisco are also good. Pings to other machines are a different story, though. With small packet sizes (56 bytes, and such) they're fine. But with larger packets, I start getting packet loss. For example, with a ping -s 1000, I can't remember ever seeing a packet lost between the freebsd machine and one of the suns or the cisco. But to any other machine, I can expect a 40% packet loss. This isn't just to machines outside our subnet, by the way. Our subnet extends outside of the lab that I control, and to machines other than the cisco outside of the lab, I still get the packet loss. Here is an excerpt from the machine's boot messages: ed1: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500 inet 128.138.253.107 netmask 0xffffff00 broadcast 128.138.253.255 ether 00:00:e8:12:6a:d3 lo0: flags=8009<UP,LOOPBACK,MULTICAST> mtu 16384 inet 127.0.0.1 netmask 0xff000000 lounge.colorado.edu: bad value lounge.colorado.edu: bad value ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ anyone know what these mean? And here's an excerpt of tcpdump on ed1 while I was ftp'ing a file from wcarchive: 18:29:57.219415 wcarchive.cdrom.com.ftp-data > lounge.Colorado.EDU.1047: . 11777:12289(512) ack 1 win 16384 [tos 0x8] 18:29:57.219560 truncated-ip - 489 bytes missing!wcarchive.cdrom.com.ftp-data > lounge.Colorado.EDU.1047: . 12289:12801(512) ack 1 win 16384 [tos 0x8] 18:29:57.221889 truncated-ip - 375 bytes missing!wcarchive.cdrom.com.ftp-data > lounge.Colorado.EDU.1047: . 12801:13313(512) ack 1 win 16384 [tos 0x8] 18:29:57.340279 lounge.Colorado.EDU.1047 > wcarchive.cdrom.com.ftp-data: . ack 12289 win 16384 [tos 0x8] 18:29:57.378687 wcarchive.cdrom.com.ftp-data > lounge.Colorado.EDU.1047: . 13313:13825(512) ack 1 win 16384 [tos 0x8] My concern here, of course, is the lines containing the "truncated-ip" messages. tcpdump says packets aren't being dropped by the kernel, btw. And finally the obvious question: does anyone have any diagnosis/fixes? I'm not above the conclusion that my board is cheap, but it seems strange to me that it would have no problems with traffic to/from the suns and cisco, if that's the case. Thanks, Jamey
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