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Date:      Thu, 15 Aug 2002 08:03:23 -0700
From:      "Max Clark" <max@clarksys.com>
To:        <freebsd-stable@freebsd.org>, <freebsd-questions@freebsd.org>
Subject:    Loosing network connection repeatedly without an identifiable cause
Message-ID:  <003501c2446c$e6dc7700$6445a8c0@princess>

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Hi,

I am experiancing some incredibly odd behaivor with a 4.6-Stable box.

I recently moved this machine to a different network replacing an old
computer. Without obvious cause I lose connectivity to this server. I
initially thought that there was another device trying to advertise the same
IP address (odd because I swapped IPs when I swapped machines) so I changed
the IP addresss to something that I knew wasn't in use and cleared arp on my
router. Same behavior, so I figured bad network cable/hub port so I
replaced, same behavior.

I now have a serial console cable on this machine, after I lost connectivity
again tonight I connected on the console. ifconfig -a shows the interface
up, the machine hasn't rebooted. The only thing that I can see that is odd
was an arp -a didn't show neighbor computers nor the local interface
([permanent]) entry.

I'm kind of at a loss as to what to try next. This machine worked fine on my
home LAN. Below is the dmesg, I'm using the fxp interface, I added the ed
today out of despiration.

Any help would be greatly appreciated.
Thanks in advance!
-Max

fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet x.x.x.4 netmask 0xffffffc0 broadcast x.x.x.63
        ether 00:90:27:de:8c:dc
        media: Ethernet autoselect (10baseT/UTP)
        status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
        inet 127.0.0.1 netmask 0xff000000


Copyright (c) 1992-2002 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD 4.6-STABLE #1: Wed Aug 14 12:31:50 PDT 2002
    root@jack.clarksys.com:/usr/src/sys/compile/jack
Timecounter "i8254"  frequency 1193182 Hz
CPU: Pentium III/Pentium III Xeon/Celeron (497.44-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x673  Stepping = 3

Features=0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,
CM
OV,PAT,PSE36,MMX,FXSR,SSE>
real memory  = 402644992 (393208K bytes)
avail memory = 388231168 (379132K bytes)
Changing APIC ID for IO APIC #0 from 0 to 2 on chip
Programming 24 pins in IOAPIC #0
IOAPIC #0 intpin 2 -> irq 0
FreeBSD/SMP: Multiprocessor motherboard
 cpu0 (BSP): apic id:  1, version: 0x00040011, at 0xfee00000
 cpu1 (AP):  apic id:  0, version: 0x00040011, at 0xfee00000
 io0 (APIC): apic id:  2, version: 0x00170011, at 0xfec00000
Preloaded elf kernel "kernel" at 0xc033b000.
Pentium Pro MTRR support enabled
md0: Malloc disk
Using $PIR table, 10 entries at 0xc00fc420
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Intel 82443BX (440 BX) host to PCI bridge> on motherboard
IOAPIC #0 intpin 19 -> irq 2
IOAPIC #0 intpin 17 -> irq 7
IOAPIC #0 intpin 18 -> irq 10
IOAPIC #0 intpin 20 -> irq 11
pci0: <PCI bus> on pcib0
pcib1: <Intel 82443BX (440 BX) PCI-PCI (AGP) bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <ATI Mach64-GW graphics accelerator> at 0.0
pcib2: <DEC 21152 PCI-PCI bridge> at device 2.0 on pci0
IOAPIC #0 intpin 16 -> irq 13
pci2: <PCI bus> on pcib2
ahc0: <Adaptec aic7890/91 Ultra2 SCSI adapter> port 0xdc00-0xdcff mem
0xf9fff000
-0xf9ffffff irq 13 at device 11.0 on pci2
aic7890/91: Ultra2 Wide Channel A, SCSI Id=7, 32/253 SCBs
isab0: <Intel 82371AB PCI to ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 ATA33 controller> port 0xffa0-0xffaf at device 7.1 on
pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
pci0: <Intel 82371AB/EB (PIIX4) USB controller> at 7.2 irq 2
Timecounter "PIIX"  frequency 3579545 Hz
chip1: <Intel 82371AB Power management controller> port 0x850-0x85f at
device 7.
3 on pci0
pci0: <unknown card> (vendor=0x12de, dev=0x0200) at 13.0 irq 7
pcib3: <PCI to PCI bridge (vendor=8086 device=0960)> at device 14.0 on pci0
pci3: <PCI bus> on pcib3
mlx0: <Mylex version 4 RAID interface> mem 0xf7000000-0xf7001fff irq 10 at
devic
e 14.1 on pci0
mlx0: DAC960PRL, 1 channel, firmware 4.07-0-07, 16MB RAM
mlxd0: <Mylex System Drive> on mlx0
mlxd0: 70006MB (143372288 sectors) RAID 5 (online)
ahc1: <Adaptec 3960D Ultra160 SCSI adapter> port 0xc800-0xc8ff mem
0xfe102000-0x
fe102fff irq 2 at device 16.0 on pci0
aic7899: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs
ahc2: <Adaptec 3960D Ultra160 SCSI adapter> port 0xc400-0xc4ff mem
0xfe101000-0x
fe101fff irq 11 at device 16.1 on pci0
aic7899: Ultra160 Wide Channel B, SCSI Id=7, 32/253 SCBs
fxp0: <Intel Pro 10/100B/100+ Ethernet> port 0xcc40-0xcc7f mem
0xfe000000-0xfe0f
ffff,0xfe100000-0xfe100fff irq 11 at device 17.0 on pci0
fxp0: Ethernet address 00:90:27:de:8c:dc
inphy0: <i82555 10/100 media interface> on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
orm0: <Option ROMs> at iomem 0xc0000-0xc7fff,0xc8000-0xc87ff,0xcc000-0xcefff
on
isa0
ep0: <3Com 3C509-TPO EtherLink III> at port 0x300-0x30f irq 10 on isa0
ep0: No irq?!
ep0: ep_alloc() failed! (6)
device_probe_and_attach: ep0 attach returned 6
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x100>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A, console
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
APIC_IO: Testing 8254 interrupt delivery
APIC_IO: routing 8254 via IOAPIC #0 intpin 2
SMP: AP CPU #1 Launched!
acd0: CDROM <SAMSUNG SC-140B> at ata1-master PIO4
Waiting 10 seconds for SCSI devices to settle
Mounting root from ufs:/dev/mlxd0s1a





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