Dual-Mode Vlan Ports - HP ProCurve 9304M Installation And Configuration Manual

Installation and Basic Configuration Guide
HP9300(config-vlan-7)# pvlan mapping 903 ethernet 3/2
NOTE: You also can specify the primary port and other ports on the same command line. In this example, the
command tagged ethernet 3/2 ethernet 3/5 to 3/6 is equivalent to the pair of tagged commands shown above
for the same ports.

Dual-Mode VLAN Ports

Configuring a tagged port as a dual-mode port allows it to accept and transmit both tagged traffic and untagged
traffic at the same time. A dual-mode port accepts and transmits frames belonging to VLANs configured for the
port, as well as frames belonging to the default VLAN (that is, untagged traffic).
For example, in Figure 11.19, port 2/11 is a dual-mode port belonging to VLAN 20. Traffic for VLAN 20, as well as
traffic for the default VLAN, flows from a Switch to this port. The dual-mode feature allows traffic for VLAN 20 and
untagged traffic to go through the port at the same time.
Figure 11.19 Dual-mode VLAN port example
To enable the dual-mode feature on port 2/11 in Figure 11.19:
HP9300(config)# vlan 20
HP9300(config-vlan-20)# tagged e 2/11
HP9300(config-vlan-20)# tagged e 2/9
HP9300(config-vlan-20)# int e 2/11
HP9300(config-if-e100-2/11)# dual-mode
HP9300(config-if-e100-2/11)# exit
Syntax: [no] dual-mode
In releases prior to 07.6.04, a dual-mode port accepts and transmits frames belonging to VLANs configured for the
port, as well as frames belonging to the DEFAULT-VLAN (VLAN 1). Traffic for the DEFAULT-VLAN is transmitted
untagged, and traffic for other VLANs is tagged.
Starting with release 07.6.04, 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 11.20
illustrates this enhancement.
11 - 54
VLAN 20
Traffic
HP Switch 4000
Port 2/9
Tagged, VLAN 20
VLAN 20
Traffic
Untagged
Traffic
Port 2/11
Tagged, VLAN 20
dual-mode
Port 2/10
Untagged
Untagged
Traffic