[ECOS] Multi-cast mode warning

Gary Thomas gary@mlbassoc.com
Thu Jun 29 10:06:00 GMT 2006

Tim Hatton wrote:
> Hello,
> I am currently in the process of try to get eCos (2.0.43)  running on our
> own hardware which uses a DP83848 PHY. I have used the exisiting DP83847
> driver (which came with eCos) as a base and I have got to the stage where
> the ethernet link is established. I am however getting the following warning
> message when initialising the network:
> [eth_drv_ioctl] Warning: Driver can't set multi-cast mode
> Now, if everything worked I wouldn't be worried about this, but I don't seem
> to be getting any IP packets out of the hardware (eCos is trying to send
> DHCP discovery messages but they aren't coming out to the ethernet). I
> suspect this may be a hardware issue but, I would like some confirm that the
> warning above is or isn't anything I need to look into.
> My understanding of multi-cast mode is that I shouldn't need it or care but
> if anyone could confirm or deny this I'd be very grateful.

This is indeed just a warning and has no affect on normal operations.
Multi-case mode is only important for IPv6 and specific multi-cast

If you're not getting any packets, then you probably have a different
[hardware?] problem.

Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world

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