UPF - GTP Packets in grafana/promotheus always at 0 in 4G

[Stromduster]

I'm using the 4g-volte-vowifi-deploy.yaml file, and the UPF - GTP Packets panel in Grafana stays at 0 packets, even when trafficking with multiple UEs with speedtests. Same in Prometheus, with the KPIs fivegs_ep_n3_gtp_indatapktn3upf and fivegs_ep_n3_gtp_outdatapktn3upf.
Is it normal ? Since UPF and PGW-U are collocated, I assumed the counters were shared, but maybe I'm wrong.

Thanks in advance for clarification.

[herlesupreeth]

fivegs_ep_n3_gtp_indatapktn3upf and fivegs_ep_n3_gtp_outdatapktn3upf are for 5G deployment right (as the name suggests)?

[Stromduster]

Yes, of course. However, I can't find an alternative in 4G (like S1-U, S8 or even SGi). Are there KPI for these ?

[herlesupreeth]

As per this file in open5gs repo - open5gs/open5gs/src/upf/metrics.c I dont see any 4G related metrics