1-12 
Displaying and Maintaining Basic Port Configuration 
Table 1-12 Display and maintain basic port configuration 
Operation  Command  Remarks 
Display port configuration 
information  
display interface 
[ interface-type | interface-type 
interface-number ] 
Display the enable/disable 
status of port loopback 
detection 
display loopback-detection 
Display brief information about 
port configuration 
display brief interface 
[ interface-type 
[ interface-number ] ] [ | { begin 
| include | exclude } 
regular-expression ] 
Display the combo ports on the 
current device 
display port combo 
Display port information about 
a specified unit 
display unit unit-id interface 
Display the information about 
the port with the link-delay 
command configured 
display link-delay 
You can execute the display 
commands in any view.  
Clear port statistics  
reset counters interface 
[ interface-type | interface-type 
interface-number ] 
You can execute the reset 
command in user view. 
After 802.1x is enabled on a 
port, clearing the statistics on 
the port will not work. 
 
Ethernet Port Configuration Example 
Network requirements 
z  Switch A and Switch B are connected to each other through two trunk port (Ethernet 1/0/1).  
z  Configure the default VLAN ID of both Ethernet 1/0/1 to 100.  
z  Allow the packets of VLAN 2, VLAN 6 through VLAN 50 and VLAN 100 to pass both Ethernet 1/0/1.  
Network diagram  
Figure 1-1 Network diagram for Ethernet port configuration 
 
 
Configuration procedure