Can you setup a Linux server? If so, you really need to try HAProxy:

I just set it up for a customer the other week and HAProxy is being used for
Quickr HTTP failover between Quickr clustered pair, and we're also using it
for LDAP load balancing/failover of two Domino LDAP servers. We have Cognos,
Quickr, Sametime, and Connections all directing LDAP to the HAProxy. It's
great, and very easy to configure! :)


Personal Blog:
Work Blog:

On Thu, Feb 17, 2011 at 2:49 PM, <rob@xxxxxxxxx> wrote:

We have domino servers called LDAP01, LDAP02, LDAP03. They are each on
different lpars running IBM i. Each lpar is on a different physical power
6 box. They, obviously, serve up ldap. My Domino quickr server (XQP02),
Site Administration, only allows me to enter one ldap entry. How do I get
it to roll over to LDAP02 when LDAP01 is out of service?

We tried DNS round robin years ago. That's no good. Just because I can
ping LDAP01 doesn't mean that the Domino server LDAP01 is even running.
All it means is that the OS on that lpar can return a ping. DNS round
robin isn't robust enough to check to see if ldap is being served from
that address.

Rob Berendt
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755

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