If I understand what you are asking, once the intial sessions are up, the LDAP servers do not initiate any new sessions, it re-uses the existing ones for all quries. There are 2 aspects to consider - UDP and TCP.
With TCP, when a server comes online under a rule via probe activation or manually adding a new one in, the CSS will only ever send a new TCP sessions to it. (inbound SYN is considered a new session.)
UDP is a bit different since it is a connectionless protocol, you could in theory adjust idle timers to make the CSS think an inbound packet is a new session which would essentially force the sessions to the new server. I am not sure how your application operates, I know LDAP *can* use UDP over 389 for certain functions, but its food for thought.
We weight ours to put more load on one server than others. I would think you could use standard round-robin. If a server fails then comes back up, round-robin will eventually balance them out. As I mentioned, we had a issue with timeouts so we put in the flow timeout. That resolved it. The balancing works well.
i dont think that balance method matters here. we are using aca, but I dont see how round robin or weights will solve the case.
Here is my case again:
1 application that is establishing 16 ldap binds/sessions to VIP address.
Both ldap servers are active and every one gets 8 binds/sessions.
Application is quering ldap in over established connections.
first ldap server goes down. 8 sessions are reseted, and application is establishing new 8 sessions to VIP address.
as at that time only second ldap server is available, it must handle now all 16 ldap binds/sessions.
lets say in 1 hours, failed first ldap server is coming up again. But.. application is not establishing new binds as it has reached already the max number of 16 ldap connections - all of them through VIP address and directed to second ldap server.
first ldap server will stay unused till some of the binds fail or being reseted or second ldap server dies.
Then applicaiton must establish again its binds and LB will do balancing.
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==================== VIC FNIC driver does not support Virtual Volumes (
second level LUN ID ) An enhancement request has been created to track
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