Connections to Rservers when removed from load balancing on ACE

Unanswered Question
Oct 12th, 2007

Hi, I have two servers bound to a VIP on an ACE blade and would like to take the servers out of the VIP one at a time whilst some work is carried out on them i.e so one server takes the load while one servier is being worked on. What I would like to know is, once the rserver is removed from the binding with the VIP does the ACE still service any existing connections to that rserver or do all connections get disconnected immediately? Thanks

I have this problem too.
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Syed Iftekhar Ahmed Fri, 10/12/2007 - 10:11

You can manually take a primary real server out of service gracefully using

either the no inservice command or the inservice standby command.

The no inservice command

instructs the ACE to:

? Tear down existing non-TCP connections to the server

? Allow existing TCP connections to complete before taking the server out of

service

? Disallow any new connections to the server.

With sticky configured, use the inservice standby command to gracefully take a

primary real server out of service. The inservice standby command instructs the

ACE to:

? Tear down existing non-TCP connections to the server

? Allow current TCP connections to complete

? Allow new sticky connections for existing server connections that match

entries in the sticky database

? Load-balance all new connections (other than the matching sticky

connections mentioned above) to the other servers in the server farm

? Eventually take the server out of service

Hope it helps

Syed

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