Date: Fri, 22 Sep 2000 11:07:31 -0700 (PDT) From: Stephen Krauth <stephenk@stephenk.com> To: freebsd-questions@freebsd.org Subject: dropped packets: bad ethernet card, bad conf, or what? Message-ID: <Pine.BSF.4.21.0009221037350.272-100000@beelzebub.inside.killermartian.com>
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I have three machines running FreeBSD (various versions), and all three have at one point or another been attached directly to a DSL connection. One of the machines (the one I'm currently using as my NAT gateway) seems to have consistent, but rare, network problems. By that I mean that I have trouble with very few connections, but for those connections the problem is consistent, everytime. In the case of a web site, I simply cannot ever use that web site. If I watch with tcpdump when I'm having this problem, it looks like my bad machine doesn't receive a packet or two that my other machines do. Really, the consistency is alarming, because I've tested them within minutes of each other, several times back and forth; the bad machine never works, the other machines always work. Should I start by just replacing the ethernet card that connects to DSL in the bad machine? It's a generic ISA NE2000 compatible, and it shows up as ed1. Is there anything else I can try, or are there any tests I could run to diagnose this? Anyway, for more details see a message I posted earlier this week: http://docs.freebsd.org/cgi/getmsg.cgi?fetch=1434163+0+current/freebsd-questions But for your convenience, here is some edited info: dmesg: dc0: <Intel 21143 10/100BaseTX> port 0x6500-0x657f mem 0xe1004000-0xe10043ff irq 10 at device 19.0 on pci0 dc0: Ethernet address: 00:c0:f0:4d:08:f0 ed1: <Ethernet PnP ISA Card /S> at port 0x240-0x25f irq 3 on isa0 ed1: address 00:40:05:47:cd:df, type NE2000 (16 bit) uname -a: FreeBSD azazel.inside.killermartian.com 4.1-RELEASE FreeBSD 4.1-RELEASE #3: Mon Sep 18 13:21:12 PDT 2000 stephenk@beelzebub.inside.killermartian.com:/usr/src/sys/compile/AZAZEL i386 netstat -rn: Destination Gateway Flags Netif Expire default 207.171.38.1 UGSc 4 72241 ed1 10.0.69/24 link#1 UC 0 0 dc0 => 10.0.69.2 0:0:b4:70:a3:42 UHLW 0 171 dc0 => 10.0.69.10 0:60:8:c0:0:f0 UHLW 8 145020 dc0 658 127.0.0.1 127.0.0.1 UH 0 280 lo0 207.171.38 link#2 UC 0 0 ed1 => 207.171.38.1 0:10:67:0:38:ef UHLW 5 0 ed1 159 ifconfig -a: dc0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 inet 10.0.69.1 netmask 0xffffff00 broadcast 10.0.69.255 inet6 fe80::2c0:f0ff:fe4d:8f0%dc0 prefixlen 64 scopeid 0x1 ether 00:c0:f0:4d:08:f0 media: autoselect (100baseTX) status: active supported media: autoselect 100baseTX <full-duplex> 100baseTX 10baseT/UTP <full-duplex> 10baseT/UTP none ed1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 inet 207.171.38.149 netmask 0xffffff00 broadcast 207.171.38.255 inet6 fe80::240:5ff:fe47:cddf%ed1 prefixlen 64 scopeid 0x2 ether 00:40:05:47:cd:df lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384 inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3 inet6 ::1 prefixlen 128 inet 127.0.0.1 netmask 0xff000000 Steve K. U.F.O. - "For the feeler gauge in you." To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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