Infrequent loss of network connection

[Sigfred Håversen <bsdlist@mumak.com>]

I've installed snapshot on an older laptop, and sometimes I quite simply 
loose the network connection. An ifconfig up/down will restore the network
connection, though. 

The network card is a D-Link DFE-690TXD for CardBus.

After loss of connection an ifconfig shows :

rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        address: 00:0d:88:21:5f:a3
        media: Ethernet autoselect (100baseTX full-duplex)
        status: active
        inet6 fe80::20d:88ff:fe21:5fa3%rl0 prefixlen 64 scopeid 0x5
        inet 192.168.1.37 netmask 0xffffff00 broadcast 192.168.1.255


/Sigfred


dmesg for the laptop :

OpenBSD 3.4-current (GENERIC) #116: Tue Feb 24 20:51:21 MST 2004
    deraadt@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: Intel Pentium II ("GenuineIntel" 686-class, 512KB L2 cache) 301 MHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR
real mem  = 200912896 (196204K)
avail mem = 179941376 (175724K)
using 2478 buffers containing 10149888 bytes (9912K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(7d) BIOS, date 05/02/01, BIOS32 rev. 0 @ 0xf4e22
apm0 at bios0: Power Management spec V1.2
apm0: battery life expectancy 98%
apm0: AC on, battery charge high
pcibios0 at bios0: rev. 2.1 @ 0xf4e20/0x910
pcibios0: PCI IRQ Routing Table rev. 1.0 @ 0xf5610/288 (16 entries)
pcibios0: PCI Interrupt Router at 000:07:0 ("Intel 82371AB PIIX4 ISA" rev 0x00)
pcibios0: PCI bus #2 is the last bus
bios0: ROM list: 0xc0000/0xc000
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "Intel 82443BX" rev 0x02
vga1 at pci0 dev 2 function 0 "Trident CYBER 9397" rev 0xf3
wsdisplay0 at vga1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
pcib0 at pci0 dev 7 function 0 "Intel 82371AB PIIX4 ISA" rev 0x02
pciide0 at pci0 dev 7 function 1 "Intel 82371AB IDE" rev 0x01: DMA, channel 0 wired to compatibility, channel 1 wired to compatibility
wd0 at pciide0 channel 0 drive 0: <HITACHI_DK23EA-40>
wd0: 16-sector PIO, LBA, 38154MB, 78140160 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2
atapiscsi0 at pciide0 channel 1 drive 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <TOSHIBA, CD-ROM XM-1602B, 1132> SCSI0 5/cdrom removable
cd0(pciide0:1:0): using PIO mode 0, DMA mode 1
uhci0 at pci0 dev 7 function 2 "Intel 82371AB USB" rev 0x01: irq 10
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
"Intel 82371AB Power Mgmt" rev 0x02 at pci0 dev 7 function 3 not configured
cbb0 at pci0 dev 10 function 0 "Cirrus Logic CL-PD6832 CardBus" rev 0xc1: irq 10
cbb1 at pci0 dev 10 function 1 "Cirrus Logic CL-PD6832 CardBus" rev 0xc1: irq 10
isa0 at pcib0
isadma0 at isa0
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
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
sysbeep0 at pcppi0
npx0 at isa0 port 0xf0/16: 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
cardslot0 at cbb0 slot 0 flags 0
cardbus0 at cardslot0: bus 1 device 0 cacheline 0x0, lattimer 0x20
pcmcia0 at cardslot0
cardslot1 at cbb1 slot 1 flags 0
cardbus1 at cardslot1: bus 2 device 0 cacheline 0x0, lattimer 0x20
pcmcia1 at cardslot1
biomask c440 netmask c440 ttymask d442
pctr: 686-class user-level performance counters enabled
mtrr: Pentium Pro MTRR support
dkcsum: wd0 matched BIOS disk 80
root on wd0a
rootdev=0x0 rrootdev=0x300 rawdev=0x302
rl0 at cardbus0 dev 0 function 0 "D-Link, DFE-690TXD, PC Card": irq 10 address 00:0d:88:21:5f:a3
rlphy0 at rl0 phy 0: RTL internal phy