Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide User Manual
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device(config-if-e1000-2/11)# dual-mode
device(config-if-e1000-2/11)# exit
Syntax: [no] dual-mode
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. The following figure
illustrates this enhancement.
FIGURE 95 Specifying a default VLAN ID for a dual-mode port
In the above figure, tagged port 2/11 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 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
. Tagged port 2/11 is added to
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.
device(config)# vlan 10 by port
device(config-vlan-10)# untagged ethernet 2/10
device(config-vlan-10)# tagged ethernet 2/11
device(config-vlan-10)# exit
device(config)# vlan 20 by port
device(config-vlan-20)# tagged ethernet 2/9
device(config-vlan-20)# tagged ethernet 2/11
device(config-vlan-20)# exit
device(config)# interface ethernet 2/11
device(config-if-e1000-2/11)# dual-mode 10
device(config-if-e1000-2/11)# exit
Syntax: [no] dual-mode [ vlan-id ]
You can configure multiple ports using commads such as the following.
Brocade# interface ethernet 1/1/6 to 1/1/9
Brocade (config-mif-1/1/6-1/1/9)# dual-mode
VLANs
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FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide
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