Forum Discussion
LeeG_118759
May 29, 2013Nimbostratus
Thanks Steve and Brent. Sorry for the late reply... I'm not the admin on the BigIP, so I have to coordinate the timing to investigate.
Steve, I am told we do not have a persistence profile in place. But when I get a chance again to coordinate with my Ops team, I will be sure to take a close and thorough look. I am not certain how Fiddler is working under the hood, but my knee jerk thought would be to presume it doesn't hold an open connection... but again I'm not sure. Ultimately, my "real" client will be a web page making the call via javascript, so that client should have fine-grained control (again another guess). When we changed the "Action on Service Down" setting to "Reject"... the entire system behavior did indeed work the way we expected. But because I have so many gaps in my knowledge of all the parts of the system (the HTTP server, the BigIP balancer, the client code, HTTP and TCP protocols in general) I am ignorant of a great many things. I most graciously appreciate your help.
Brent, Yes it's HTTP/1.1 (ASP.NET Web API self-hosting service .Net 4.0/4.5... it's not hosted in IIS). I don't currently know how or even /if/ I can modify the self-hosting service properties. This is my first foray in many of these technologies, so my knowledge is very limited. I read about the iRule features, although I have no first-hand experience. I will make a note of that possibility and discuss it with my Operations guy (he's overworked and under-staffed at-the-moment). Also, thank you for the extra explanation of the differences between "Disabled" and "Offline". It seems that perhaps we might indeed have a "Persistence Profile" and just don't know it. I will re-inquire about that and look more thoroughly.
Thank you to both of you, and I will report back my findings as they come in.
Lee
The server protocol is indeed HTTP/1.1, but I'm not sure I fully understand how Keep-Alives work. I though they were initiated solely by the client... but perhaps I'm completely wrong. As for the "Action on Service Down" setting