2-5 
To do…  Use the command…  Remarks 
Enter system view 
system-view 
— 
Enter Ethernet port view 
interface interface-type 
interface-number 
— 
Configure the port link type as 
Trunk 
port link-type trunk 
Required 
Allow the specified VLANs to 
pass through the current Trunk 
port 
port trunk permit vlan 
{ vlan-id-list | all } 
Required 
By default, all Trunk ports only 
allow packets of VLAN 1 to 
pass. 
Configure the default VLAN for 
the Trunk port 
port trunk pvid vlan vlan-id 
Optional 
VLAN 1 is the default by 
default. 
 
 
z  To convert a Trunk port into a Hybrid port (or vice versa), you need to use the Access port as a 
medium. For example, the Trunk port has to be configured as an Access port first and then a Hybrid 
port.  
z  The default VLAN IDs of the Trunk ports on the local and peer devices must be the same. 
Otherwise, packets cannot be transmitted properly. 
 
Displaying and Maintaining Port-Based VLAN 
To do…  Use the command…  Remarks 
Display the hybrid or trunk ports  display port { hybrid | trunk } Available in any view. 
 
Port-Based VLAN Configuration Example 
Network requirements 
z  As shown in Figure 2-1, Switch A and Switch B each connect to a server and a workstation (Host). 
z  For data security concerns, the two servers are assigned to VLAN 101 with the descriptive string 
being “DMZ”, and the PCs are assigned to VLAN 201.  
z  The devices within each VLAN can communicate with each other but that in different VLANs 
cannot communicate with each other directly.