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Thiyagu_163984's avatar
Thiyagu_163984
Icon for Nimbostratus rankNimbostratus
May 14, 2015

HTTP 404 error through LTM though one of the backend webserver is up

Hello All, I'm working on a failover testing with Webservers. When one web server (of the 2) was offline, refreshing the website in a browser caused the website 404 error.

 

If one webserver is down LTM should detect the failed webserver and it should forward the traffic to next available server.

 

As far I know if we are getting the 404 error indicates client asking for something that the server thinks does not exist.

 

Could you please help me to troubleshoot this issue?

 

How to trace why the LTM is forwarding the request to backend server though the backend server is down?

 

will it be due to fail detect interval configured wrongly?

 

Regards, Thiyagarajan

 

3 Replies

  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    May 14, 2015

    was the pool member (server) marked down by health monitor?

     

  • Thiyagu_163984's avatar
    Thiyagu_163984
    Icon for Nimbostratus rankNimbostratus
    May 15, 2015

    Hi, I can only check that during the next testing window. Is there anything to check on LTM? to ensure we have not missed any configuration from LTM?

     

    Regards, T.K

     

  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    May 15, 2015

    i think capturing packet and generating qkview (after capturing packet) may be enough.

     tcpdump -nni 0.0:nnn -s0 -w /var/tmp/output.pcap host x.x.x.x or host y.y.y.y -v
x.x.x.x is virtual server ip or client ip
y.y.y.y is pool member ip