VM of N3IWUE has slow upload in speedtest

[SimonWelke]

NOTE: Same question asked here: free5gc/free5gc#535

Hello free5gc,

I followed your tutorial for the N3IWUE one-to-one (i.e. two VMs for free5GC and N3IWUE etc.) and it worked straight away. Good work on your part!

However, I noticed that a simple speedtest (installed with "sudo apt speedtest-cli") gives unexpected results. The download on the VM for the N3IWUE delivers over 100Mbit/s, which matches my internet connection, but the upload barely hits 1Mbit/s.

To be on the safe side, I also ran the speedtest on my host system (fast PC with Ubuntu 22.04) and in the VM for free5gc - both DL and UL are very fast and well above 100Mbit/s.

Do you have any idea why the uplink is so slow during a speedtest in the VM of the N3IWUE?

Simon

[allen0091]

I believe this issue is due to the way N3IWF listens to the GRE tunnel, which is causing slow traffic. We are still considering how to address this.