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

[David J. Hughes]

On 05/11/2005, at 10:42 AM, David Sinn wrote:

> RFC 1812 strictly precludes routers from accepting ARP's where the
> returned MAC address is a multicast one:

The clustering used by Checkpoint for HA Firewall 1 clusters used the 
"multicast mac / unicast IP" mechanism.  Always a pain in the rear-end 
when there's a cisco in the middle.  Looks like Checkpoint decided it 
was safer just to play by the book as they now use a totally different 
clustering mechanism that does not send back a dodgy arp response.  As 
amazing as it may seem, Microsoft is implementing problems that the 
rest of the industry has already solved.


David
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