My firewall has started to do:

Jan 20 10:35:20 bud /netbsd: tlp0: receive error: dribbling bit
Jan 20 10:35:20 bud /netbsd: tlp0: receive error: CRC error
Jan 20 10:35:22 bud /netbsd: tlp0: receive error: dribbling bit
Jan 20 10:35:22 bud /netbsd: tlp0: receive error: CRC error

This interface is plugged directly into a GVC ADSL modem doing bridged ethernet.
A couple of other interfaces did this for awhile, and the switch died or
needed to be reset soon afterwards. The GVC ADSL modem has been power cycled
already.  (As has the firewall)

Can anyone say what this means? Clearly, there is corruption, which the CRC
is in fact catching, but any deeper hit on the dribbling bit? This is a
D-LINK 4-port card in a Dell Optiplex (thus the two PCI bridges):

ppb1 at pci0 dev 15 function 0: Digital Equipment DECchip 21152 PCI-PCI Bridge (rev. 0x02)
pci2 at ppb1 bus 2
pci2: i/o space, memory space enabled, rd/line, wr/inv ok
ppb2 at pci2 dev 10 function 0: Digital Equipment DECchip 21152 PCI-PCI Bridge (rev. 0x03)
pci3 at ppb2 bus 3
pci3: i/o space, memory space enabled, rd/line, wr/inv ok
tlp0 at pci3 dev 4 function 0: DECchip 21143 Ethernet, pass 4.1
tlp0: interrupting at irq 11
tlp0: Ethernet address 00:80:c8:ca:76:69
nsphyter0 at tlp0 phy 1: DP83843 10/100 media interface, rev. 0
nsphyter0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
tlp1 at pci3 dev 5 function 0: DECchip 21143 Ethernet, pass 4.1
tlp1: interrupting at irq 10
tlp1: Ethernet address 00:80:c8:ca:76:6a
nsphyter1 at tlp1 phy 1: DP83843 10/100 media interface, rev. 0
nsphyter1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
tlp2 at pci3 dev 6 function 0: DECchip 21143 Ethernet, pass 4.1
tlp2: interrupting at irq 9
tlp2: Ethernet address 00:80:c8:ca:76:6b
nsphyter2 at tlp2 phy 1: DP83843 10/100 media interface, rev. 0
nsphyter2: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
tlp3 at pci3 dev 7 function 0: DECchip 21143 Ethernet, pass 4.1
tlp3: interrupting at irq 11
tlp3: Ethernet address 00:80:c8:ca:76:6c
nsphyter3 at tlp3 phy 1: DP83843 10/100 media interface, rev. 0
nsphyter3: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
ex0 at pci0 dev 17 function 0: 3Com 3c905-TX 10/100 Ethernet (rev. 0x0)
ex0: interrupting at irq 11
ex0: MAC address 00:c0:4f:96:2f:f8
nsphy0 at ex0 phy 24: DP83840 10/100 media interface, rev. 1
nsphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto


]       ON HUMILITY: to err is human. To moo, bovine.           |  firewalls  [
]   Michael Richardson, Sandelman Software Works, Ottawa, ON    |net architect[
] mcr@sandelman.ottawa.on.ca http://www.sandelman.ottawa.on.ca/ |device driver[
] panic("Just another Debian GNU/Linux using, kernel hacking, security guy"); [