H3C交换机开局，一些初始化命令建议关闭，例如:
用户名自己新建
打开ssh
关闭默认vlan1
新建自己网管vlan
启用ntp服务
undo telnet server enable
undo dns server 114.114.114.114
undo interface Vlan-interface1
undo snmp-agent community private
undo snmp-agent community public
undo local-user clouduser class manage
undo local-user admin class manage
undo ip http enable
undo ip https enable
undo cloud-management server domain
ssh server enable
stp global enable
ntp-service enable
ntp-service source Vlan-interface100
ntp-service unicast-server 192.168.20.1
