You can modify the configuration file to record more logs.
diff -u /etc/open5gs/mme.yaml.old /etc/open5gs/mme.yaml
--- mme.yaml.old 2018-04-15 18:28:31.000000000 +0900
+++ mme.yaml 2018-04-15 19:53:10.000000000 +0900
@@ -2,6 +2,7 @@
logger:
file: /var/log/open5gs/mme.log
+ level: debug
parameter:
After changing conf files, please restart Open5GS daemons.
$ sudo systemctl restart open5gs-mmed
$ sudo systemctl restart open5gs-sgwd