Packet loss during iperf3 test

[ashiqpathan]

Issue Description

I have configured 5G NSA END-to-END(https://docs.srsran.com/en/latest/app_notes/source/5g_nsa_zmq/source/index.html#g-nsa-zmq-appnote). I am using open5gs as the core network. I am able to connect ue to gnb. But using iperf3 I am getting very low throughput and a high data loss. An iperf3 screenshot is given below-

Setup Details

I have a total 3 VM,

• in VM1 ran vm--> srsran (enb and ue )
• VM2 open5gs control plane
• VM3 open5gs UPF all VM running on ubuntu 18.04 LTS.

Behavior

Iperf3 with 100Mbps BW produces high packet loss around 94% drop. What might cause this behavior? Why the throughput is limited ??

[brightcheng]

It could be the issue of ogstun of open5gs. You may try sudo ethtool -s ogstun speed 10000