Forum Discussion

Andrew_Husking's avatar
Andrew_Husking
Icon for Cirrus rankCirrus
Nov 03, 2016

Auto-Enable after Receive Disable String

I've been looking at the Receive Disable String on some HTTP monitors, and we can confirm that when the monitor detects the string the pool members do in fact get disabled, but when the receive string is returned instead the member never gets returned to enabled. Is this normal? or is there a way to automatically re-enable the member once it's functioning again?

 

Thanks in advance.

 

application delivery
LTM
monitors
  • JG's avatar
    JG
    Icon for Cumulonimbus rankCumulonimbus
    Nov 04, 2016

    What are your "Receive String" and "Receive Disable String"?

     

  • Vijay_E's avatar
    Vijay_E
    Icon for Cirrus rankCirrus
    Nov 04, 2016

    Is there only one monitor for the pool ? Are there monitors at the node or pool member level ?

     

    When the "Recv" string is returned, the pool member should be marked online. Where you able to confirm for sure that the "Recv" string is indeed sent by the pool member to the F5 by running CURL from F5 to the relevant pool member ?

     

    If so, have you checked to make sure that the monitor doesn't have "Manual Resume" enabled. This could cause the down pool member to be down till it is manually enabled.

     

    Also, check to make sure that the "Reverse" setting is not enabled.

     

    Reference link.

     

  • kjewin1's avatar
    kjewin1
    Icon for Nimbostratus rankNimbostratus
    May 16, 2019

    Just tried this and got the similar result, Receive-Disable String Online=false causes the node to be Disabled but when string is the set to Online=true node is still Disabled have to force it Online through the GUI of F5