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Forum Discussion

Jérôme_ANGLES's avatar
Jérôme_ANGLES
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Nov 25, 2014

Delay between two HTTP requests in a common TCP.flow (between 10 - 30 seconds)

I have a long wait on a application configured on a bigip LTM 3900 v10.2.2. I captured the traffic on the bigip and there are a few things i see that seems strange...   On a common tcp.flow, th...
application delivery
design
LTM
performance
Jérôme_ANGLES's avatar
Jérôme_ANGLES
Icon for Nimbostratus rankNimbostratus
Nov 27, 2014

I have no irules involved on this virtual server. This is an http application runnin on port 80 built with the template "HTTP application" where i changed a few things on the HTTP profile:

 

  • Add x-forwarded-for HTTP-header
  • No Caching

The tcpdump syntax are :

 

  • Server Side (Linux Redhat Server): tcpdump -B 4096 -s0 -ni eth0:nnn 'port 16073 or icmp' -w
  • On the BigIP : tcpdump -s0 -ni 0.0:nnn '(host 129.195.246.121 and port 80) or ((host 129.195.112.65 or host 129.195.112.77) and port 16073) or icmp' -w
  • Client Side: use of wireshark on windows - no filter

It seems no traffic is lost, but on the client side, i see many retransmission. I tried a few changed on the tcp profile, but nothing thing to help.