Date: Wed, 14 Feb 2007 14:00:30 -0800 From: "Glen Van Lehn" <gvanlehn@ccsf.edu> To: <dparussalla@baysidegrp.com.au>, <freebsd-stable@freebsd.org> Subject: Re: Intermittent network issues with Freebsd 6.2 Message-ID: <s5d31619.016@bat-gwpo.ccsf.edu>
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>>> "Dimuthu Parussalla" <dparussalla@baysidegrp.com.au> 02/11/07 3:54 PM = >>> Hi All, I am having intermittent network issues with our IBM X236 dual xeon = server. Server comes with two bge network cards. At random intervals internal lan drops out. And then few minutes later it comes back online. So far I can only find some interface errors on netstat -i. Can anyone = help me to resolve this issue. Please refer to attached files and below outputs for more information. /etc/sysctl.conf kern.ipc.maxsockbuf=3D8388608 kern.ipc.somaxconn=3D2048 net.inet.tcp.sendspace=3D3217968 net.inet.tcp.recvspace=3D3217968 net.inet.tcp.rfc1323=3D1 #net.inet.tcp.rfc3042=3D0 net.inet.ip.portrange.hilast=3D65535 net.inet.ip.portrange.hifirst=3D49152 net.inet.ip.portrange.last=3D65535 net.inet.ip.portrange.first=3D1024 net.inet.tcp.inflight.enable=3D0 /boot/loader.conf kern.ipc.nmbclusters=3D32768 vmstat -i interrupt total rate irq52: ips0 75446 17 irq30: ahd0 81 0 irq31: ahd1 15 0 irq1: atkbd0 69 0 irq3: sio1 74 0 irq4: sio0 67 0 irq6: fdc0 90 0 irq14: ata0 47 0 irq16: bge0 bge1+ 1395326 315 irq19: uhci1 15 0 irq23: ehci0 1 0 cpu0: timer 8845847 1998 cpu3: timer 1 0 cpu1: timer 2 0 cpu2: timer 8830658 1995 Total 19147739 4326 netstat -i Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll bge0 1500 <Link#1> 00:11:25:e9:7f:58 392325 880 449420 0 0 bge0 1500 192.168.1 lan 342652 - 4175 - - bge1 1500 <Link#2> 00:11:25:e9:7f:59 369744 1648 363688 0 0 Regards Dimuthu Parussalla =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D Do you have access to the network switch that your server connects to? = The stats on the port may show CRC errors or the log may show carrier = off/on transitions indicating that 'Auto-negotiation' isn't stable. I've = seen this a lot with 100FDx connections and a few times with GbE. = Sometimes it helps to change the port speed/duplex settings from 'Auto' to = <fixed whatever> [or vice versa ;]. My preference has been to use = 'Auto' if it works, and, if it doesn't, to nail down the server settings, = then see whether nailing the switch port setting or leaving the switch = port in 'Auto' is best. =20 ymmv, glen van lehn city college san francisco
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