1. 登录设备：
    2. telnet 172.16.1.254
    3. admin
    4. Admin@huawei.com
    6. SNMP配置：
    7. snmp-agent
    8. snmp-agent sys-info version v2c  
    9. snmp-agent mib-view included View_ALL iso  
    10. snmp-agent community read cipher ynnk@123r mib-view View_ALL   
    11. snmp-agent community write cipher ynnk@123w mib-view View_ALL 
    12. snmp-agent target-host trap address udp-domain 172.16.1.250 params securityname ynnk@123t v2c
    13. snmp-agent trap source Vlanif 10
    14. snmp-agent trap enable 
    17. ·············snmp-agent trap source MEth0/0/1
    21. 对二层端口up/down不进行上报
    22. int range GigabitEthernet 1/0/1 to GigabitEthernet 1/0/48
    23. undo enable snmp trap updown
    24. int range GigabitEthernet 2/0/1 to GigabitEthernet 2/0/48
    25. undo enable snmp trap updown