快速设置，笔记
# set snmp name <名字>
# set snmp description <简介>
# set snmp location <位置>
# set snmp contact <邮箱>
# set snmp view all oid .1 include
# set snmp view manager oid .1.3.6.1.2.1.2.2.1 include
# set snmp client-list list <允许访问的IP>
# set snmp community <snmp 名称> view all
# set snmp community <snmp 名称> authorization read-only
# set snmp community <snmp 名称> client-list-name list# commit 确认配置，结束