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

[Brett Looney]

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.