Re: [freebsd-questions] Bandwidth Troubleshooting
Gunter Wambaugh wrote: The sad thing is that I read somewhere (probably on this list) that *forcing* 100 would _increase_ performance because there wouldn't be any auto negotiating. I added it to my rc.conf, but later I decided that it didn't help any so I ran ifconfig fxp0 media autoselect, but failed to change my rc.conf back! Now I have learned that not only did it not improve performance, it seriously crippled it. Thanks for helping me track that down. If you have two auto-negotiating devices and one is hard-set to a particular speed/duplex, then the other should always choose 100/Half. It doesn't try and auto-detect what the other one is speaking. It's supposed to be a *negotiation* and if one party doesn't talk, then the other one defaults. So if you can get your Linksys to force the port speed, then you can safely do it on your server, otherwise auto-negotiation should negotiate 100/Full anyway if both can do it. Here's a better explanation than mine: http://www.cites.uiuc.edu/network/autosense.html#how I lost count of how many times this has bitten me in various shapes and forms. Howie ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Bandwidth Troubleshooting
On May 17, 2006, at 8:01 PM, Mike Tancsa wrote: At 08:47 PM 17/05/2006, Gunter Wambaugh wrote: On Mon, 15 May 2006 20:13:05 -0500, in sentex.lists.freebsd.questions you wrote: media: Ethernet 100baseTX This looks like you have it set to 100-FD *Manual*. Try ifconfig fxp0 media autoselect What kind of switch do you have your NIC plugged into ? What is the output of netstat -ni and sysctl -a | grep flight ---Mike $ netstat -ni NameMtu Network Address Ipkts IerrsOpkts Oerrs Coll fxp0 1500 00:06:29:de:51:ab 44071780 1735 52399432 0 0 fxp0 1500 fe80:1::206:2 fe80:1::206:29ff:0 - 3 - - fxp0 1500 192.168.1 192.168.1.106 44029897 - This box is plugged into my Linksys Wireless router. I don't think it's the router as other boxes connected to it seem unaffected. I tried swapping the network cable and the port on the router, but Ierrs increased. Bad network card? Misconfigured network card/ driver? It looks like a duplex mismatch. Change your duplex settings to auto and see how things go from there. ---Mike ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions- [EMAIL PROTECTED]" AHA! That worked. The sad thing is that I read somewhere (probably on this list) that *forcing* 100 would _increase_ performance because there wouldn't be any auto negotiating. I added it to my rc.conf, but later I decided that it didn't help any so I ran ifconfig fxp0 media autoselect, but failed to change my rc.conf back! Now I have learned that not only did it not improve performance, it seriously crippled it. Thanks for helping me track that down. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Bandwidth Troubleshooting
At 08:47 PM 17/05/2006, Gunter Wambaugh wrote: On Mon, 15 May 2006 20:13:05 -0500, in sentex.lists.freebsd.questions you wrote: media: Ethernet 100baseTX This looks like you have it set to 100-FD *Manual*. Try ifconfig fxp0 media autoselect What kind of switch do you have your NIC plugged into ? What is the output of netstat -ni and sysctl -a | grep flight ---Mike $ netstat -ni NameMtu Network Address Ipkts IerrsOpkts Oerrs Coll fxp0 1500 00:06:29:de:51:ab 44071780 1735 52399432 0 0 fxp0 1500 fe80:1::206:2 fe80:1::206:29ff:0 - 3 - - fxp0 1500 192.168.1 192.168.1.106 44029897 - This box is plugged into my Linksys Wireless router. I don't think it's the router as other boxes connected to it seem unaffected. I tried swapping the network cable and the port on the router, but Ierrs increased. Bad network card? Misconfigured network card/driver? It looks like a duplex mismatch. Change your duplex settings to auto and see how things go from there. ---Mike ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Bandwidth Troubleshooting
On Mon, 15 May 2006 20:13:05 -0500, in sentex.lists.freebsd.questions you wrote: media: Ethernet 100baseTX What kind of switch do you have your NIC plugged into ? What is the output of netstat -ni and sysctl -a | grep flight ---Mike Mike Tancsa, Sentex communications http://www.sentex.net Providing Internet Access since 1994 [EMAIL PROTECTED], (http://www.tancsa.com) ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions- [EMAIL PROTECTED]" $ netstat -ni NameMtu Network Address Ipkts IerrsOpkts Oerrs Coll fxp0 1500 00:06:29:de:51:ab 44071780 1735 52399432 0 0 fxp0 1500 fe80:1::206:2 fe80:1::206:29ff:0 - 3 - - fxp0 1500 192.168.1 192.168.1.106 44029897 - 52370049 - - fxp1* 1500 00:06:29:de:51:aa0 0 0 0 0 lo0 16384 299664 0 299664 0 0 lo0 16384 ::1/128 ::1817 - 817 - - lo0 16384 fe80:3::1/64 fe80:3::10 - 0 - - lo0 16384 127 127.0.0.1 298847 - 298847 - - $ sysctl -a | grep flight net.local.inflight: 0 net.inet.tcp.local_slowstart_flightsize: 4 net.inet.tcp.slowstart_flightsize: 1 net.inet.tcp.inflight.stab: 20 net.inet.tcp.inflight.max: 1073725440 net.inet.tcp.inflight.min: 6144 net.inet.tcp.inflight.debug: 0 net.inet.tcp.inflight.enable: 1 This box is plugged into my Linksys Wireless router. I don't think it's the router as other boxes connected to it seem unaffected. I tried swapping the network cable and the port on the router, but Ierrs increased. Bad network card? Misconfigured network card/driver? Thanks for your help. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Bandwidth Troubleshooting
On Mon, 15 May 2006 20:13:05 -0500, in sentex.lists.freebsd.questions you wrote: > media: Ethernet 100baseTX What kind of switch do you have your NIC plugged into ? What is the output of netstat -ni and sysctl -a | grep flight ---Mike Mike Tancsa, Sentex communications http://www.sentex.net Providing Internet Access since 1994 [EMAIL PROTECTED], (http://www.tancsa.com) ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Bandwidth Troubleshooting
On 5/15/06, Gunter Wambaugh <[EMAIL PROTECTED]> wrote: I have been having this off and on problem with my FreeBSD server for some time now, and I haven't been able to track down the cause. Bottom line: network throughput between local boxes is around 200KB/ s on a 100MBs network. This will last for a few hours and then quietly return to the ~2MB/s I am used to. (Speed according to scp). I have used netstat -anf inet, sockstat -4, ps auxww, and top to see what is running, but I see nothing obvious. I do see the occasional fxp0: link state changed to DOWN fxp0: link state changed to UP Sounds to me like a physical layer problem to me: bad cable, bad interface port, etc. -- -- Perfection is just a word I use occasionally with mustard. --Atom Powers-- ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Bandwidth Troubleshooting
You might want to try: /usr/ports/net-mgmt/bandwidthd It will give you an idea of what your entire usage is and if it is on this server or somewhere else causing the slowdowns. -Derek At 08:13 PM 5/15/2006, Gunter Wambaugh wrote: I have been having this off and on problem with my FreeBSD server for some time now, and I haven't been able to track down the cause. Bottom line: network throughput between local boxes is around 200KB/ s on a 100MBs network. This will last for a few hours and then quietly return to the ~2MB/s I am used to. (Speed according to scp). I have used netstat -anf inet, sockstat -4, ps auxww, and top to see what is running, but I see nothing obvious. I do see the occasional fxp0: link state changed to DOWN fxp0: link state changed to UP in my dmesg. Anyone have any suggestions on how to track this thing down? uname -a FreeBSD gorgoroth.six-two.net 6.0-RELEASE FreeBSD 6.0-RELEASE #1: Sat Feb 25 11:25:33 CST 2006 [EMAIL PROTECTED]:/usr/obj/usr/ src/sys/OPTIMIZED i386 ifconfig fxp0: flags=8843 mtu 1500 options=8 inet6 fe80::206:29ff:fede:51ab%fxp0 prefixlen 64 scopeid 0x1 inet 192.168.1.106 netmask 0xff00 broadcast 192.168.1.255 ether 00:06:29:de:51:ab media: Ethernet 100baseTX status: active fxp1: flags=8802 mtu 1500 options=8 ether 00:06:29:de:51:aa media: Ethernet autoselect (none) status: no carrier lo0: flags=8049 mtu 16384 inet6 ::1 prefixlen 128 inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3 inet 127.0.0.1 netmask 0xff00 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]" -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks transtec Computers for their support. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks transtec Computers for their support. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Bandwidth Troubleshooting
I have been having this off and on problem with my FreeBSD server for some time now, and I haven't been able to track down the cause. Bottom line: network throughput between local boxes is around 200KB/ s on a 100MBs network. This will last for a few hours and then quietly return to the ~2MB/s I am used to. (Speed according to scp). I have used netstat -anf inet, sockstat -4, ps auxww, and top to see what is running, but I see nothing obvious. I do see the occasional fxp0: link state changed to DOWN fxp0: link state changed to UP in my dmesg. Anyone have any suggestions on how to track this thing down? uname -a FreeBSD gorgoroth.six-two.net 6.0-RELEASE FreeBSD 6.0-RELEASE #1: Sat Feb 25 11:25:33 CST 2006 [EMAIL PROTECTED]:/usr/obj/usr/ src/sys/OPTIMIZED i386 ifconfig fxp0: flags=8843 mtu 1500 options=8 inet6 fe80::206:29ff:fede:51ab%fxp0 prefixlen 64 scopeid 0x1 inet 192.168.1.106 netmask 0xff00 broadcast 192.168.1.255 ether 00:06:29:de:51:ab media: Ethernet 100baseTX status: active fxp1: flags=8802 mtu 1500 options=8 ether 00:06:29:de:51:aa media: Ethernet autoselect (none) status: no carrier lo0: flags=8049 mtu 16384 inet6 ::1 prefixlen 128 inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3 inet 127.0.0.1 netmask 0xff00 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
