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Rudolf_184216's avatar
Rudolf_184216
Icon for Nimbostratus rankNimbostratus
Jan 28, 2015

SPDY and Web Acceleration cannot be used together

If I enable both a SPDY and Web Acceleration profile on a Virtual Server, the initial html page is downloaded but all subsequent HTTP requests (javascript, css, images etc.) return with size 0 and response status 0.

 

If I switch off either of them then it seems to work fine. Has anyone else encountered this?

 

Platform: BIG-IP 11.5.0 Build 1.0.227 Hotfix HF1

 

application delivery
LTM
performance
spdy
web acceleration
  • NikhilB's avatar
    NikhilB
    Icon for Employee rankEmployee
    Jan 29, 2015

    Have you tried with a different web page? (configured a separate web acceleration profile) Are all the subsequent requests actually cached?

     

  • Rudolf_184216's avatar
    Rudolf_184216
    Icon for Nimbostratus rankNimbostratus
    Jan 30, 2015

    Hi. Yes, I have tried with a different web page and separate web acceleration profile. I'm not sure if all these requests are being cached as I do not have access to the F5 command-line.

     

    The strange thing is even with web acceleration off, the SPDY virtual server (or browser) seems to fall back to HTTP 1.1 after working for a bit. I cannot see the SPDY headers where I saw them previously.

     

    In Chrome chrome://net-internals/spdy is also reporting no SPDY sessions for my virtual server. This plug-in is reporting that the site is not SPDY enabled: https://chrome.google.com/webstore/detail/spdy-indicator/mpbpobfflnpcgagjijhmgnchggcjblin?hl=en

     

    However this site: https://spdycheck.org/ is reporting that SPDY is supported. Firefox also reports that SPDY is enabled when I use this plug-in: https://addons.mozilla.org/en-us/firefox/addon/spdy-indicator/

     

    I can also see this header being added in Firefox: X-Firefox-Spdy:"3"

     

    But then again, the response headers in Firefox still look like HTTP headers instead of SPDY headers.

     

    Are there log files on the F5 that can shed more light on what's happening? If so, where are they located?

     

    At this point SPDY support very much feels like a BETA feature that's was bolted on at the last-minute. Either that or browsers are quite finicky in their interpretation of the protocol.