Been having some strange issues with a system recently upgraded to 5.3.
Previously this computer was running OpenBSD 5.1, and was rock solid with
close to a year of uptime.

I went through the regular upgrade procedure
(booting from a 5.3 CD), and sysmerge, no problems reported during the
upgrade.


After the system has been running for a couple days, it stops
responding to network traffic in or out. Some kind of weird routing issue is
occurring, even affecting localhost:

# ping localhost 
PING localhost
(127.0.0.1): 56 data bytes
ping: sendto: No route to host
ping: wrote
localhost 64 chars, ret=-1
--- localhost ping statistics ---
1 packets
transmitted, 0 packets received, 100.0% packet loss

After a few hours,
everything returns to normal.

The system is dual-core, so I tried both single
& multiprocessor kernels to rule that out, but no luck. I've tried with the
5.3-stable kernel, and the 5.3-release kernel, but the problem occurs with
both. I haven't tried 5.3-current yet.

The dmesg is below. The system is
lightly loaded, it is running a squid web proxy, dhcp server and arpwatch on
different interfaces.

There isn't anything in the logs, aside from network
failures like 

Jun 10 12:45:33 hostname ntpd[21828]: bad peer from pool
pool.ntp.org (192.95.61.224) 
Jun 10 12:45:33 hostname ntpd[21828]: bad peer
from pool pool.ntp.org (192.75.12.11)

I'm really stumped with this one. Any
suggestions?


Thanks.


OpenBSD 5.3 (GENERIC) #50: Tue Mar 12 18:35:23 MDT
2013
    dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC
cpu0:
Intel(R) Pentium(R) 4 CPU 3.40GHz ("GenuineIntel" 686-class) 3.40 GHz
cpu0:
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUS
H,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,NXE,LONG,SSE3,DTES64,MWAIT,DS-CPL,E
ST,CNXT-ID,CX16,xTPR,LAHF,PERF
real mem  = 2137088000 (2038MB)
avail mem =
2091192320 (1994MB)
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date
07/12/06, BIOS32 rev. 0 @ 0xffe90, SMBIOS rev. 2.3 @ 0xf0450 (73 entries)
bios0: vendor Dell Inc. version "A08" date 07/12/2006
bios0: Dell Inc.
OptiPlex GX620
acpi0 at bios0: rev 2
acpi0: sleep states S0 S1 S3 S4 S5
acpi0:
tables DSDT FACP SSDT APIC BOOT ASF! MCFG HPET
acpi0: wakeup devices VBTN(S4)
PCI0(S5) PCI4(S5) PCI2(S5) PCI3(S5) PCI1(S5) PCI5(S5) PCI6(S5) MOU_(S3)
USB0(S3) USB1(S3) USB2(S3) USB3(S3)
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0
(boot processor)
cpu0: apic clock running at 199MHz
cpu at mainbus0: not
configured
ioapic0 at mainbus0: apid 8 pa 0xfec00000, version 20, 24 pins
ioapic0: misconfigured as apic 0, remapped to apid 8
acpimcfg0 at acpi0 addr
0xf0000000, bus 0-63
acpihpet0 at acpi0: 14318179 Hz
acpiprt0 at acpi0: bus 4
(PCI4)
acpiprt1 at acpi0: bus 2 (PCI2)
acpiprt2 at acpi0: bus 3 (PCI3)
acpiprt3 at acpi0: bus 1 (PCI1)
acpiprt4 at acpi0: bus -1 (PCI5)
acpiprt5 at
acpi0: bus -1 (PCI6)
acpiprt6 at acpi0: bus 0 (PCI0)
acpicpu0 at acpi0
acpibtn0 at acpi0: VBTN
bios0: ROM list: 0xc0000/0xa800! 0xca800/0x1000
0xcb800/0x2000! 0xcd800/0x2800
cpu0: Enhanced SpeedStep disabled by BIOS
pci0
at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0
"Intel 82945G Host" rev 0x02
ppb0 at pci0 dev 1 function 0 "Intel 82945G PCIE"
rev 0x02: apic 8 int 16
pci1 at ppb0 bus 1
em0 at pci1 dev 0 function 0 "Intel
PRO/1000 PT (82571EB)" rev 0x06: apic 8 int 16, address 00:15:17:6f:bc:5c
em1
at pci1 dev 0 function 1 "Intel PRO/1000 PT (82571EB)" rev 0x06: apic 8 int
17, address 00:15:17:6f:bc:5d
vga1 at pci0 dev 2 function 0 "Intel 82945G
Video" rev 0x02
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
intagp0 at vga1
agp0 at
intagp0: aperture at 0xe0000000, size 0x10000000
inteldrm0 at vga1: apic 8 int
16
drm0 at inteldrm0
"Intel 82945G Video" rev 0x02 at pci0 dev 2 function 1
not configured
ppb1 at pci0 dev 28 function 0 "Intel 82801GB PCIE" rev 0x01:
apic 8 int 16
pci2 at ppb1 bus 2
bge0 at pci2 dev 0 function 0 "Broadcom
BCM5751" rev 0x01, BCM5750 A1 (0x4001): apic 8 int 16, address
00:13:72:98:43:7d
brgphy0 at bge0 phy 1: BCM5750 10/100/1000baseT PHY, rev. 0
ppb2 at pci0 dev 28 function 1 "Intel 82801GB PCIE" rev 0x01: apic 8 int 17
pci3 at ppb2 bus 3
uhci0 at pci0 dev 29 function 0 "Intel 82801GB USB" rev
0x01: apic 8 int 21
uhci1 at pci0 dev 29 function 1 "Intel 82801GB USB" rev
0x01: apic 8 int 22
uhci2 at pci0 dev 29 function 2 "Intel 82801GB USB" rev
0x01: apic 8 int 18
uhci3 at pci0 dev 29 function 3 "Intel 82801GB USB" rev
0x01: apic 8 int 23
ehci0 at pci0 dev 29 function 7 "Intel 82801GB USB" rev
0x01: apic 8 int 21
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "Intel EHCI
root hub" rev 2.00/1.00 addr 1
ppb3 at pci0 dev 30 function 0 "Intel 82801BA
Hub-to-PCI" rev 0xe1
pci4 at ppb3 bus 4
em2 at pci4 dev 0 function 0 "Intel
PRO/1000GT (82541GI)" rev 0x05: apic 8 int 16, address 00:1b:21:2f:a9:35
xl0
at pci4 dev 2 function 0 "3Com 3c905B 100Base-TX" rev 0x30: apic 8 int 18,
address 00:01:02:c8:45:47
exphy0 at xl0 phy 24: 3Com internal media interface
auich0 at pci0 dev 30 function 2 "Intel 82801GB AC97" rev 0x01: apic 8 int 23,
ICH7 AC97
ac97: codec id 0x41445374 (Analog Devices AD1981B)
ac97: codec
features headphone, 20 bit DAC, No 3D Stereo
audio0 at auich0
ichpcib0 at pci0
dev 31 function 0 "Intel 82801GB LPC" rev 0x01: PM disabled
pciide0 at pci0
dev 31 function 1 "Intel 82801GB IDE" rev 0x01: DMA, channel 0 configured to
compatibility, channel 1 configured to compatibility
atapiscsi0 at pciide0
channel 0 drive 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun
0: <Optiarc, DVD+-RW ND-3570A, 104B> ATAPI 5/cdrom removable
atapiscsi1 at
pciide0 channel 0 drive 1
scsibus1 at atapiscsi1: 2 targets
cd1 at scsibus1
targ 0 lun 0: <ASUS, CD-S400/A, 2.3S> ATAPI 5/cdrom removable
cd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2
cd1(pciide0:0:1): using
PIO mode 4, Ultra-DMA mode 2
pciide0: channel 1 ignored (disabled)
pciide1 at
pci0 dev 31 function 2 "Intel 82801GB SATA" rev 0x01: DMA, channel 0
configured to native-PCI, channel 1 configured to native-PCI
pciide1: using
apic 8 int 20 for native-PCI interrupt
wd0 at pciide1 channel 0 drive 0:
<ST3160812AS>
wd0: 16-sector PIO, LBA48, 152587MB, 312500000 sectors
wd0(pciide1:0:0): using PIO mode 4, Ultra-DMA mode 6
ichiic0 at pci0 dev 31
function 3 "Intel 82801GB SMBus" rev 0x01: SMI
iic0 at ichiic0
spdmem0 at iic0
addr 0x50: 512MB DDR2 SDRAM non-parity PC2-4200CL5
spdmem1 at iic0 addr 0x51:
512MB DDR2 SDRAM non-parity PC2-4200CL5
spdmem2 at iic0 addr 0x52: 512MB DDR2
SDRAM non-parity PC2-4200CL5
spdmem3 at iic0 addr 0x53: 512MB DDR2 SDRAM
non-parity PC2-4200CL5
usb1 at uhci0: USB revision 1.0
uhub1 at usb1 "Intel
UHCI root hub" rev 1.00/1.00 addr 1
usb2 at uhci1: USB revision 1.0
uhub2 at
usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb3 at uhci2: USB revision
1.0
uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb4 at uhci3:
USB revision 1.0
uhub4 at usb4 "Intel UHCI root hub" rev 1.00/1.00 addr 1
isa0
at ichpcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte
fifo
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq
1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pcppi0 at
isa0 port 0x61
spkr0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0
port 0xf0/16: reported by CPUID; using exception 16
fdc0 at isa0 port 0x3f0/6
irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
mtrr: Pentium
Pro MTRR support
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at
root
scsibus3 at softraid0: 256 targets
root on wd0a (782b3d7fb3f21963.a) swap
on wd0b dump on wd0b

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