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Forum Discussion

Sakib's avatar
Sakib
Icon for Nimbostratus rankNimbostratus
May 13, 2024

How to solve "TCP retransmit timeout" & "TCP RST from remote system" issue on BIG-IP LTM?

Hi Experts, We have an application which sends 80K+ https requests in 2 ~ 3 minutes. Client application extracts data from an API hosted behind BIG-IP . Big-IP is hosted in AWS EC2. Job was working ...
application delivery
zamroni777's avatar
zamroni777
Icon for MVP rankMVP
May 13, 2024

you can try disable "Acknowledge on Push" in virtual server's client (side) tcp profile,
so bigip doesnt wait for server response for ACKnowledging client's tcp push.

if client is not near to the aws api gw, i suggest you also check the network latency because sometime aws network routing is not optimal.
i had experience of bad aws intercontinental latency that routing the transaction via gcp/azure resulted much higher bandwidth.

  • Sakib's avatar
    Sakib
    Icon for Nimbostratus rankNimbostratus
    May 13, 2024

    AWS region is same for Ec2 / BIg-IP , AWS API gateway , NLB and ECS. I will disable the "Acknowledge on Push" on client side TCP profile. Thank you for your reply.