[c-nsp] Microsoft multicasted cluster vs. Cisco IOS

[Olivier Dauby]

Brett Looney wrote:
> At 00:44 5/11/2005, you wrote:
> 
>>The Microsoft cluster is supposed to listen on a virtual ip address 
>>using a multicast mac address. Local users see the virtual ip of the 
>>cluster (10.106.49.6) with a mac address 03:BF:0A:6A:31:06. I'm 
>>already a bit confused here since I expected the multicast mac 
>>address to begin with 0x01 instead of 0x03.
>>
>>The routers also seem to be confused, they have been unable to learn 
>>this mac address as you can see in this 'show arp' output:
>>
>>I quickfixed this with a dirty 'arp' command on both routers:
>>
>>        arp 10.106.49.6 03BF.0A6A.3106 arpa
> 
> 
> Yeah - there is a MS technote about this (can't find it right 
> now...). Routers won't learn a multicast MAC address for a unicast IP 
> address. You've done exactly what they suggest...
> 
> B.

Oh I see,

http://www.microsoft.com/technet/prodtechnol/windowsserver2003/library/ServerHelp/fdcd461f-0fd6-4164-928f-6f1841fdc27d.mspx

Thanks for your support,

O.