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DES-7200 Configuration Guide Chapter 5 VLAN Configuration
5-13
5.3 Configuring VLAN
Trunks
5.3.1 Overview
A trunk is a point-to-point link that connects one or multiple Ethernet switching
interfaces to other network devices (for instance, router or switch). A trunk can
transmit the traffics of multiple VLANs.
The Trunk encapsulation of DES-7200 device is 802.1Q-complied. The
following diagram shows a network connected with trunks.
You can set a common Ethernet port or aggregate port to be a trunk port. For
the details of aggregate port, refer to Configuring Aggregate Port.
In order to switch an interface between the access mode and the trunk mode,
use the switchport mode command:
Command Function
DES-7200(config-if)# switchport
mode access
Set an interface to the access mode
DES-7200(config-if)# switchport
mode trunk
Set an interface to the Trunk mode
A native VLAN must be defined for a trunk port. The untagged packets received
and sent through the port are deemed as the packets of the native VLAN.
Obviously, the default VLAN ID of the port (that is, the PVID in the IEEE 802.1Q)
is the VLAN ID of the native VLAN. Moreover, you must untag them before