[c-nsp] MAC address problem with Cat3550

[Tóth András]

Hi,

It is caused by an older type of PHY being used on a limited number of
switches only. Newer versions of the 3550 are not causing this
problem.

Best regards,
Andras


On Mon, Feb 28, 2011 at 1:35 AM, daigo nakayama <nkymdg at gmail.com> wrote:
> Hi,
>
> I found one problem with Catalyst3550.
> It has already turned out that the cause of the problem is Bug CSCdx74914.
>
> Vender's engineer said that
>
>  - Only frames with destination MAC address 5xxx-xxxx-xxxx
>  - Only received on 10Mb/sec interfaces
>  - The FCS errors counter increments
>  - Work around is 'Reconfigure the interface to operate at 100Mb/sec'
>
> Why does this problem occur only by 10Mbps?
> What is different in 100Mbps and 10Mbps? (100BASE-TX and 10BASE-T??)
> Does anyone know the generating mechanism of this behavior?
>
> I worry that the same behavior by not only 5xxx but also other numbers.
>
> Regards,
>
> -----
> nkymdg
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