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Can I configure Domino to use private LAN for Directory lookups?

This is question referring to your Ask The Expert response Create a separate LAN for cluster replication traffic. We have both a private and a public LAN, and cluster replication works great on the private LAN. Can I configure Domino to use the private LAN for other tasks, such as Directory lookups? I would like to move all of my secondary Domino directories from my primary mail server to a backup server, but I don't want the lookup traffic on the public LAN. Is there a way to have Domino do address lookups via the private LAN?
If it is a private LAN, then by definition the public users at your company could not use it. Normally, a private LAN for cluster traffic is an isolated switch that only has cluster NICs in it. Your normal LAN users have no access to that subnet, so directory lookups will not work on the private LAN. I'm curious as to why you would want to move lookups. Lookups take very little bandwidth (2-3 kb), and on a 10 MB or 100 MB LAN, they are but a speck of dust in that pipe.

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