https://blog.csdn.net/qq_35428201/article/details/90896096

配置错误当删除命令时，遇到Error: Please renew the default configurations.

如端口配置如下，要恢复成默认
interface GigabitEthernet0/0/1
port link-type trunk
undo port trunk allow-pass vlan 1

正确删除以上配置的命令，要一层一层的删除
interface GigabitEthernet0/0/1
undo port trunk allow-pass vlan all    //退出所有vlan
port trunk allow-pass vlan 1  //恢复加入vlan1
port link-type access   //

方法2：
也可以系统视图下执行clear configuration interface GigabitEthernet 0/0/1
 clear configuration interface e0/0/2  //在ensp下测试成功
以下命令执行后端口将被关闭，需到接口视图下执行 undo shutdown 

不同内容恢复方法不一样
[AirEngine9700S-S-GigabitEthernet0/0/2]dis this                                
#                                                                              
interface GigabitEthernet0/0/2                                                 
 port link-type access          //这句可忽略，因为端口默认为access                                               
 port default vlan 2           //这句要用 port default vlan 1 来恢复缺省                                              
#                                                                              
return