Hello @theja,
I’m not sure.
Can you try the following trouble shooting ideas?
The plugin documentation mentions that tls handshake failures can occur due to insecure tls configurations in the GNMI server. Maybe adjust tls_min_version or tls_cipher_suites telegraf/plugins/inputs/gnmi/README.md at master · influxdata/telegraf · GitHub.
Use debug = true to check logs and share them.
This could help too? Or this user might?
Otherwise @skartikey might know something I don’t 
