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PARMAR_289528's avatar
PARMAR_289528
Icon for Nimbostratus rankNimbostratus
Sep 08, 2016

Server Pool not coming up in Big Ip LTM VE(virtual edition) 90 days trial version

Hi ,

 

I am setting up a Big-Ip lab using the Big Ip LTM VE(virtual edition) 90 days trial version, I am following the Keith Barker CBT nuggets to create the lab and using his resources provided in the nuggetlab file. I have created three nodes and have added them in a pool , i have added a default http health monitor to server pool , but my pool is showing offline(Red) with a description "offline(enabled- the children pool members are down)" and my nodes are in unknown status. If i use ICMP as a health monitor , my pool and nodes becomes available(green).Below is the troubleshooting i have done.

 

  1. i can ping all the three nodes from the BIg-IP command line utility.
  2. I can telnet to all the three nodes at port 80
  3. I checked that server gives the proper response(Header and body) of the webpage using " get / http/1.1" command.
  4. "tmsh list /ltm monitor http" shows the default interval/timeout values.
  5. I have restarted the big Ip virtual appliance multiple times.
  6. I have removed and reconfigured the nodes and pool multiple times.

Attached are the screen shots. Please suggest where i am wrong and what else i can check or this is a limitation in this trial version.

 

Any help is highly appreciated.

 

Regards kamal

 

 

application delivery
LTM

7 Replies

  • IainThomson85_1's avatar
    IainThomson85_1
    Icon for Cumulonimbus rankCumulonimbus
    Sep 08, 2016

    You're looking at Node Level checking - I don't think you'll have enabled node level checking by default.

     

    what does it show in the pool you've added the members to ?

     

    Also - if you ran a tcpdump on the back end of the F5 - are you getting a response back from your health checking traffic ?

     

    tcpdump -i 0.0 host (IP of server) and (port of server)

     

    Remove the brackets.

     

    Let us know how you get on.

     

    • PARMAR_289528's avatar
      PARMAR_289528
      Icon for Nimbostratus rankNimbostratus
      Sep 08, 2016

      Hi Thomson,

       

      I also tried the node level health check using the "node default" option in the node configuration page, but that also didn't help.

       

      Regards kamal

       

  • PARMAR_289528's avatar
    PARMAR_289528
    Icon for Nimbostratus rankNimbostratus
    Sep 08, 2016

    Hi Thomsan,

     

    Thanks for your reply.

     

    Pool shows "Offline (Enabled) - The children pool member(s) are down".

     

    i started the capture and stopped the capture after a minute but I don't see any traffic when I do a tcpdump -i 0.0 host 10.2.0.22 and 80

     

    Regards kamal

     

    • boneyard's avatar
      boneyard
      Icon for MVP rankMVP
      Sep 11, 2016

      i believe it is port 80 and why write to a file to then open it? for just checking if traffic is flowing in a test environment use the screen as output.

       

  • Samir_Jha_52506's avatar
    Samir_Jha_52506
    Icon for Noctilucent rankNoctilucent
    Apr 21, 2017

    Reviewed above post but no where seen curl output. I believe back-end server is up & port is not learning with HTTP service.

    Check below thing to troubleshoot further. 1) Directly hit to back end server through browser and check you are getting page

     http://x.x.x.x:80     --> Here x.x.x.x will be back end server IP with 80 port



2) Attach curl & telnet output to check further

   curl -gv http://x.x.x.x:80 
   telnet x.x.x.x:80

    Does it makes sense?

    • plethore_312934's avatar
      plethore_312934
      Icon for Cirrus rankCirrus
      Apr 21, 2017

      I had a similar issue, when using the 90 day trial for the CBT Nuggets lab, the Pool would show down. What my issue was the default HTTP monitor being used.

       

      I created a new monitor under Local Traffic -> Monitors

       

      Name http_11.3

       

      Parent Monitor - http

       

      Send String: GET / HTTP/1.0\r\n\r\n

       

      Leave other options as the defaults.

       

      Then under Local Traffic -> Pool choose the OUR-WEB-SERVER pool. In the Health Monitors section add the http_11.3 monitor and remove the http monitor, and make sure to update the configuration.

       

      See if that works.