(usagi-users 01884) Re: switch problems with multicast ethernet packets?

[Pekka Savola <pekkas@xxxxxxxxxx>]

On Tue, 8 Oct 2002, Hadmut Danisch wrote:
> after trying the ipv6 code of the plain linux kernel,
> I found a problem of my local ethernet switch (cheap one).
> 
> The neighbor solicitation is based on multicast ethernet
> packets (33:33:xx:xx:xx:xx), but my switch doesn't seem
> to handle such packets properly. Experiments with 
> plain ipv4 udp packets showed that the switch forwards
> packets to 00: and to broadcast ff:ff:ff:ff:ff:ff correctly,
> but in most cases drops packets to addresses with other
> prefixes, e.g. 33: 
> 
> Has anyone else experienced such problems?

Yes.

Please take a peek at:

http://www.netcore.fi/pekkas/ietf/draft-savola-v6ops-multicast-issues-00.txt

-- 
Pekka Savola                 "Tell me of difficulties surmounted,
Netcore Oy                   not those you stumble over and fall"
Systems. Networks. Security.  -- Robert Jordan: A Crown of Swords