Forum Discussion

aries_232853's avatar
aries_232853
Icon for Nimbostratus rankNimbostratus
Nov 16, 2018

On Big-IP pcap, server sends the RST; On server pcap, self-IP sends the RST.

Hi!

 

Just wondering if you guys ever encountered this issue before. We gathered packet captures on the Big-IP LTM, and on the server to troubleshoot an issue. We have configured SNAT automap so the floating self-IP serves as the client/source on the server-side connection.

 

Upon inspection, I noticed that when I take a look at the Big-IP LTM pcap and filter for a particular stream, the server ends the connection by sending a reset. However, when I check the same stream on the server pcap, it is the Big-IP floating self-IP sending the reset on the connection.

 

Any ideas on the cause of this?

 

application delivery
BIG-IP
LTM
  • aries22's avatar
    aries22
    Icon for Altocumulus rankAltocumulus
    Nov 19, 2018

    Hi! I've attached a screenshot of both pcaps but I intentionally ommitted the IP addresses and URI Path:

    Sys::Version
Main Package
  Product     BIG-IP
  Version     12.1.2
  Build       2.0.276
  Edition     Hotfix HF2
  Date        Sat Nov 11 04:32:09 PST 2017

Kernel
  Type        Linux
  Release     2.6.32-431.56.1.el6.f5.x86_64