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On Thu, 13 Mar 2003 15:53, Howard Shane wrote:
> Brad,
> This has really only happened once since I applied the patch, and I
> think that may have been a real service disconnection. I've never gone
> this long without an interruption.
>
> Also for the HOW-TO I'm writing, I would like to know if this message is
> of concern when the modem/system powers up:
>
> +++++++++++++++++++++++++++++++++++
> Can't use SetEthernetMulticastFilters request
This is optional for CDC Ethernet device to support.
> Mar 2 11:00:52 K7 kernel: CDCEther.c: Ethernet information found at
> device configuration. Trying to use it anyway.
This is a design bug in your modem. It is characteristic of the Broadcom
reference design. The bug is annoying, and ugly to code around, but the
message is harmless - we deal with this specific modem design as a special
case.
> Mar 2 11:00:52 K7 kernel: CDCEther.c: Found Header descriptor, CDC
> version 110.
This is normal.
> Mar 2 11:00:52 K7 kernel: CDCEther.c: Imperfect filtering support -
> need sw hashing
This is a bit difficult to explain - I assume that you know what multicasting
is - when you join a multicast group, this can be handled by the networking
device so that other multicast traffic doesn't cause interrupts. That is
called "perfect filtering". However sometimes the number of multicast
addresses exceeds the number of filters that you have. This leads to
"imperfect filtering", which can cut down the number of interrupts, but you
still need to do some work in the networking stack.
Then you get to the typical cable modem implementation, and there is not
filtering at all. Every multicast packet goes to the host to be filtered.
This doesn't normally matter though, because the cable modem is a point to
point link.
> +++++++++++++++++++++++++++++++++++
>
> Is there some user-space application I am missing ('need sw hashing') or
> something I have misconfigured?
It is all normal - this is just driver status verbosity. Very useful to help
diagnose problems, but otherwise just noise.
Brad
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