現象
ovtopmd 3931 RUNNING Running. Lost connection to master agent.
netmon 3933 RUNNING No connection with master agent
端口衝突問題,修改 /etc/services ,修改 161 成 10161,重啓系統
snmpd 10161/udp snmp # SMA snmp daemon
snmp 10161/udp # Simple Network Management Protocol