...
root@srx300-3> request system services dhcp release ge-0/0/0.0
root@srx300-3> show security flow statistics
Current sessions: 0
Packets forwarded: 7
Packets dropped: 1
Fragment packets: 0
Pre fragments generated: 0
Post fragments generated: 0
2- On the server:
root@EX4200_TOR_SELab> show configuration | display set | match traceoptions
set system processes dhcp-service traceoptions file jlkdhcp_logfile
set system processes dhcp-service traceoptions flag all
...