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madhava's avatar
madhava
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Jun 21, 2023

Http server node receives partial http request big-ip load balancer

I am trying to setup BIG-IP load balancer first time, here is my setup. Client send traffic to virtual server and I have a node behind internal server. I am sending a simple get request to virtual s...
application delivery
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  • Mohamed_Ahmed_Kansoh's avatar
    Mohamed_Ahmed_Kansoh
    Jun 22, 2023

    Hi madhava , 

    I see in the Pcap that no completed flow between client side and server side , Bigip Resets the connection when seeing the HTTP GET request , I see also this GET request maybe truncated , something corrupted in this Request and not follow the standard of http. 

    Please test the below steps : 
    1) change the standard http Virtual server to >>> Performance layer 4 , you have to remove http profile prior to changing the virtual server type. 
    Performance layer 4 Virtual server  means that >>> Bigip will forward all requests ( somehow acts as a router ) Not http Checks.

    2) repeat the Tcpdump command that I sent in the first reply , and upload it. 

    Let us see what will be the behavior and decide what is the suitable workaround for your issue. 

    Look forward to hearning from you soon 🙂 

Mohamed_Salah_'s avatar
Mohamed_Salah_
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Hello madhava ,

Can you please provide us with virtual server configuraiton in both scenarios (standard, and performance)

just type the below command after and before changing the virtual server configuration.

#tmsh list ltm virtual "virtual server name"

So we can start checking both output.

Thanks,

madhava's avatar
madhava
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Jun 27, 2023

Hi Mohamed_Salah_ 

I just started everything a fresh from the start (creating new VS etc...). It magically started working, I don't remember doing anything diffrent but worked (still not clear why it sends truncated http request), but some of the responses here helped to give some direction. I am good for now, will use these suggestions in future if I  encounter the issue again.

Thanks

Madhava