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Harps_VIrdee_Si's avatar
Harps_VIrdee_Si
Icon for Nimbostratus rankNimbostratus
Oct 31, 2018

Health Check failing because server cannot accept more TCP connections

Hi ALL,

 

I have a server pool with 2 netcool servers listening on port6068. It is monitored by a custom TCP monitor on TCP6068. Now the Pool is marked down until the server admin closes active TCP 6068 sessions. It seems only 1 TCP 6068 connection is allowed on the server ( not sure why ). Is there another way we can health monitor the servers effectively? (avoiding using icmp ).

 

Thanks Harps

 

application delivery
BIG-IP

13 Replies

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    • Harps_VIrdee_Si's avatar
      Harps_VIrdee_Si
      Icon for Nimbostratus rankNimbostratus
      Oct 31, 2018

      Hi Raghavendra,

       

      Thanks, unfortunately there are no web services running on the server. so content check won't be an option :(

       

      Thanks Harps

       

    • Harps_VIrdee_Si's avatar
      Harps_VIrdee_Si
      Icon for Nimbostratus rankNimbostratus
      Oct 31, 2018

      Hi Raghavendra,

       

      Thanks, unfortunately there are no web services running on the server. so content check won't be an option :(

       

      Thanks Harps

       

  • RaghavendraSY_7's avatar
    RaghavendraSY_7
    Icon for Cumulonimbus rankCumulonimbus
    Oct 31, 2018

    Ok. can you check connection configurations under advanced pool section, see any limit is configured.

     

    • Harps_VIrdee_Si's avatar
      Harps_VIrdee_Si
      Icon for Nimbostratus rankNimbostratus
      Oct 31, 2018

      Hi,

       

      Connection limit is set to 0. Think its more on the server side limiting the connections.

       

      is there any monitoring the F5 can do at command line level on the sever?

       

  • RaghavendraSY's avatar
    RaghavendraSY
    Icon for Altostratus rankAltostratus
    Oct 31, 2018

    Ok. can you check connection configurations under advanced pool section, see any limit is configured.

     

    • Harps_VIrdee_Si's avatar
      Harps_VIrdee_Si
      Icon for Nimbostratus rankNimbostratus
      Oct 31, 2018

      Hi,

       

      Connection limit is set to 0. Think its more on the server side limiting the connections.

       

      is there any monitoring the F5 can do at command line level on the sever?

       

  • RaghavendraSY's avatar
    RaghavendraSY
    Icon for Altostratus rankAltostratus
    Nov 01, 2018

    Can you please paste your configurations here and also tcpdump packet capture details.