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Anna_Novikova_1's avatar
Anna_Novikova_1
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Oct 19, 2015

Configuring Virtual Service to retry requests on timeout

Hi all, I want to configure the following behaviour: if one server has not answered on http request in e.g. 1 second, the request will be resent to another server. Is it possible?  
application delivery
devops
htt::retry
iRules
Brad_Parker_139's avatar
Brad_Parker_139
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Oct 19, 2015

You can configure your the pool attached to your Virtual Server to re-select a new pool member by changing the "Reselect Tries" to a value higher than 0. It will re-select a new pool member as many times as you configure there.

 

  • G_C_33937's avatar
    G_C_33937
    Icon for Nimbostratus rankNimbostratus
    Oct 19, 2015
    Thanks, Brad! Based on https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/ltm_configuration_guide_10_1/ltm_pools.html, Reselect Tries - Specifies the number of times that the system tries to contact a new pool member after a passive failure. 1 question: what means passive failure? 2 question: there is no possibility to specify the time out, am i right?
  • Brad_Parker_139's avatar
    Brad_Parker_139
    Icon for Nacreous rankNacreous
    Oct 19, 2015
    There is no timeout configured, a handshake failure would result in pool re-selection.
  • Brad_Parker_139's avatar
    Brad_Parker_139
    Icon for Nacreous rankNacreous
    Oct 19, 2015
    This previous post suggests the failure to receive data timeout would most likely be configured using the SYN retransmission in your server-side TCP profile. https://devcentral.f5.com/s/feed/0D51T00006kHGNOSA4 . I'm inclined to agree.