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Jack_H_39707
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Jun 30, 2010

Connection Limit on Virtual Server

Dear all, recently I have configured the Connection Limit on the virtual server to limit the number of connections. However, whenever a established connection goes idle for 1 minutes, the existing connection will drop and refresh (no stickiness). The persistence i use was source address. Would appreciate if there is anyone could advise or share your experience with the similar issue before. Thanks all in advance.

 

3 Replies

  • Just to add on. Can anyone advise me if my statement of understanding is correct.

     

    1. If i am using cookies as persistence and happened that my connection is outside the connection limit range allows. my connection will be drop but once I am in the range of connection limit allows, I will still obtain the same session to continue my process since my cookies is still alive.

     

    2. If i am using source address as persistence and happened that my connection is outside the connection limit range allows. my connection will be drop even i try to reconnect and inside the range of connection limit allows. I would not be able to be using the same session which has timeout.

     

     

    Sorry for the trouble. Will really appreciate if anyone could advise. Thanks!
  • The great thing about cookies is that even though the TCP connection may have been deleted, the user will still get sent to the right resource. If using source_address persistence, a record is created in the persistence table that maps their source IP to a pool member. There's a "source_addr" persistence profile that's configured with a certain timeout value - when that timer expires, the F5 deletes the record and there's no guarantee that the user will get sent to the correct resource if/when they come back.