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Forum Discussion

Navin_130677's avatar
Navin_130677
Icon for Nimbostratus rankNimbostratus
Oct 07, 2015

F5 Connection Rate Limit for VIP

Has anyone implemented Connection Rate Limit under the Virtual Servers -Advanced Configuration what do clients see after the particular rate limit is setup for a VIP.  
Hannes_Rapp_162's avatar
Hannes_Rapp_162
Icon for Nacreous rankNacreous
Oct 07, 2015

Clients sending requests after the Connection Rate Limit has been exceeded will receive TCP packet in response where RST flag is set to 1. Or in other words, just "Connection Reset".

 

Note that this applies to entirely new connection attempts (handshakes), any existing connections will not be interrupted in case of threshold breach.

 

  • Joe_Lupo_283884's avatar
    Joe_Lupo_283884
    Icon for Nimbostratus rankNimbostratus
    Jan 31, 2017

    To piggy-back on this conversation. I need to know how to get a server back to "Available" once it has hit the rate limit. In one post I saw somewhere it was stated to set the Connection Rate Limit to "0" to get the Virtual Server back to "Available", but I want to keep a Connection Rate Limit on this VS, but get the VS back to "Available". Currently, no matter how high I set the Connection Rate Limit the VS goes back to "Unavailable (Enabled) - The virtual server's rate limit has been reached".

     

    Any insight??

     

  • Hannes_Rapp_162's avatar
    Hannes_Rapp_162
    Icon for Nacreous rankNacreous
    Feb 18, 2017

    Hi,

     

    "Currently, no matter how high I set the Connection Rate Limit the VS goes back to "Unavailable (Enabled)"

     

    Before the limit is breached, the status should be Green or Blue (depending on if you use health-check monitors against pool members). Only after the limit is breached, it should switch to Yellow. Recommend to contact support with that, seems like unintended outcome.