Henrik,

See answers:

>> Why two VIP and how do clients select which VIP they should connect to?
DHCP scopes for each VLAN are configured with the options for the 
auto-discovery proxy (i.e. 172.16.10.7). They are using NTLM at the moment so 
hostname is not a problem. Moving to Kerberos though will be...

>> WHat is the multicast addresses used for?
Comms between the proxies - it's how the VIPs decide their priorities etc. 
Clients are completely unaware of them.

>> I usually do a setup very similar to what you describe by using Linux 
>> heartbeat using it's ldirectord component for managing the load balancing. 
>> This scales to pretty much any number of hosts using one or more VIP.

One thing though is that I'm not wanting to NLB - just have the failover 
capability if I want it. Does your setup still allow that?

Nick






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