Subject: Re: "dribbling bit"
To: None <>
From: Michael Richardson <>
List: tech-net
Date: 01/21/2003 12:59:56

>>>>> "Thor" == Thor Lancelot Simon <> writes:
    >> 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

    Thor> This is usually a symptom of a duplex mismatch or MII configuration
    Thor> problem.  Unfortunately, the various 21x4x and clones use a truly
    Thor> wild variety of physical interface mechanisms and don't present a
    Thor> uniform interface for configuring them; worse, some of them don't
    Thor> do Nway negotiation in hardware but require a software state 
    Thor> machine.  Our driver is a lot better than it was, but doesn't
    Thor> always get it right, and with some chips it's worse than that: the
    Thor> driver will somehow get out of sync after everything's worked fine
    Thor> for a long time.

  okay, fair enough.
  a) This is a real 21143 chip. 
  b) this is a straight cable to a GVC ADSL modem. I can force things to
  10baseT, instead of auto, if you think that may help get around nway.

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

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