Dell PowerConnect B-FCXs Configuration Manual page 541

FIGURE 109
In Figure
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 2/11 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
VLANs 10 and 20, then designated a dual-mode port whose specified default VLAN is 10. In this
configuration, port 2/11 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 ethernet 2/10
PowerConnect(config-vlan-10)# tagged ethernet 2/11
PowerConnect(config-vlan-10)# exit
PowerConnect(config)# vlan 20 by port
PowerConnect(config-vlan-20)# tagged ethernet 2/9
PowerConnect(config-vlan-20)# tagged ethernet 2/11
PowerConnect(config-vlan-20)# exit
PowerConnect(config)# interface ethernet 2/11
PowerConnect(config-if-e1000-2/11)# dual-mode 10
PowerConnect(config-if-e1000-2/11)# exit
Syntax: [no] dual-mode [<vlan-id>]
Notes:
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•
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PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Specifying a default VLAN ID for a dual-mode port
VLAN 10
Untagged
Traffic
Dual-mode Port2/11
Default VLAN ID 10
Tagged, VLAN 20
Hub
VLAN 20
Tagged
Traffic
109, tagged port 2/11 is a dual-mode port belonging to VLANs 10 and 20. The default
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.
The dual-mode feature is disabled by default. Only tagged ports can be configured as
dual-mode ports.
In trunk group, either all of the ports must be dual-mode, or none of them can be.
Dual-mode VLAN ports
Port2/10
Untagged, VLAN 10
Switch
Port2/9
Tagged, VLAN 20
Figure 109. Tagged port 2/11 is added to
13
VLAN 10
Untagged
Traffic
VLAN 20
Tagged
Traffic
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