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madhava's avatar
madhava
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Jun 21, 2023
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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...
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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 🙂 

madhava's avatar
madhava
Icon for Altocumulus rankAltocumulus
Jun 22, 2023

Hi Mohamed_Ahmed_Kansoh 

Thanks! My fix not working anymore, after changing "Standard" to "Performance(HTTP)" it worked for brief period then I am seeing same issue again. This time I tried with SNAT "Auto Map", but no luck still has same issue as described originally, yes diagram you described is correct and I am not using any specific profiles in VS configuration everything I left as default. Here I am attaching TCP dump as you suggested, appreciate your help.,

Thanks

Madhava

Mohamed_Ahmed_Kansoh's avatar
Mohamed_Ahmed_Kansoh
Icon for MVP rankMVP
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 🙂