3com 3031 Instruccion De Instalación

The common protocol used to implement Trunk is IEEE802.1Q (dot1q), a standard 
protocol of IEEE. It identifies the VLAN through adding a 4-byte VLAN TAG to the 
end of the source address field in the original Ethernet packet.

VLANs cannot directly interconnect with each other and routers supporting VLAN 
must be used to connect each VLAN to implement the interconnection among 
VLANs. Usually, this is a kind of layer 3 (IP layer) interconnection.

Perform the following in the System View or interface view.

By default, there is no encapsulation mode on the system subinterface, nor is there 
VLAN ID associated with the subinterface, nor the limit of maximum number of 
processed packets.

After finishing the above configurations, execute the 

 commands in any 

view to view the running state information of the VLAN configuration for verifying 
the effect of the configuration.

Execute the 

 command in user views to clear the statistics information of 

running.

Table 286   Basic VLAN configuration

Create an Ethernet subinterface and enter its view 
(in system view)

Set the IP address of an Ethernet subinterface (in 
interface view)

Set the encapsulation type of an Ethernet 
subinterface or a gigabit Ethernet subinterface and 
related VLAN ID (in interface view)

Set the maximum number of packets processed by a 
VLAN per second (in system view)

Restore the default maximum number of packets 
processed by a VLAN per second (in system view)

Table 287   Displaying and debugging VLAN

Display the maximum number of processed 
packets configured on a specified VLAN

Display the packet statistics of the specified 
VLAN, including the received and sent packet 
numbers

Display the VLAN packet statistics of the 
specified interface.

display vlan statistics interface 
interface-type interface-num 
protocol { arp | ip }

Display the VLAN configuration information 
on an interface

Clear the packet statistics of specified VLAN

Clear the VLAN packet statistics of specified 
interface