Quick Reference Guide

306 PowerConnect B-Series TI24X Configuration Guide
53-1002269-02
Dual-mode VLAN ports
10
You can configure a dual-mode port to transmit traffic for a specified VLAN (other than the
DEFAULT-VLAN) as untagged, while transmitting traffic for other VLANs as tagged. Figure 73
illustrates this enhancement.
FIGURE 73 Specifying a default VLAN ID for a dual-mode port
In Figure 73, tagged port 11 is a dual-mode port belonging to VLANs 10 and 20. The default VLAN
assigned to this dual-mode port is 10. This means that the port transmits tagged traffic on VLAN
20 (and all other VLANs to which the port belongs) and transmits untagged traffic on VLAN 10.
The dual-mode feature allows tagged traffic for VLAN 20 and untagged traffic for VLAN 10 to go
through port 11 at the same time. A dual-mode port transmits only untagged traffic on its default
VLAN (that is, either VLAN 1, or a user-specified VLAN ID), and only tagged traffic on all other
VLANs.
The following commands configure VLANs 10 and 20 in Figure 73. Tagged port 11 is added to
VLANs 10 and 20, then designated a dual-mode port whose specified default VLAN is 10. In this
configuration, port 11 transmits only untagged traffic on VLAN 10 and only tagged traffic on VLAN
20.
PowerConnect(config)# vlan 10 by port
PowerConnect(config-vlan-10)# untagged e 10
PowerConnect(config-vlan-10)# tagged e 11
PowerConnect(config-vlan-10)# exit
PowerConnect(config)# vlan 20 by port
PowerConnect(config-vlan-20)# tagged e 9
PowerConnect(config-vlan-20)# tagged e 11
PowerConnect(config-vlan-20)# exit
PowerConnect(config)# int e 11
PowerConnect(config-if-e10000-11)# dual-mode 10
PowerConnect(config-if-e10000-11)# exit
Syntax: [no] dual-mode [<vlan-id>]
Notes:
• If you do not specify a <vlan-id> in the dual mode command, the port default VLAN is set to 1.
The port transmits untagged traffic on the DEFAULT-VLAN.
VLAN 10
Untagged
Traffic
VLAN 10
Untagged
Traffic
VLAN 20
Tagged
Traffic
VLAN 20
Tagged
Traffic
Dual-mode Port11
Default VLAN ID 10
Tagged, VLAN 20
Port10
Untagged, VLAN 10
Port9
Tagged, VLAN 20
Hub
Switch