Compared with Huawei's configuration, Cisco configured layer-3 switches to use TELNET to log on. Cisco has more levels, as I posted on other blogs, but I didn't, you have to wait... switch> enableSwitch # configure terminal Switch (config) # interface f0/1 Switch (config-if) # no switchport Switch (config-if) # ip address 192.168.0.1 255.255.255.0Switch (config-if) # no shutdown Switch (config-if) # endSwitch # configure the ip address of port f0/1 of port 3550 to 192.168.0.1. [Configure terminal can also be written as conf t, which can be abbreviated for convenience but is not easy to remember when getting started] Switch> enableSwitch # configure terminal Switch (config) # username test password 123 qweSwitch (config) # line vty 0 4 Switch (config) # Do not forget to configure login local for login local. After many configurations, tell me that login local is not configured.