Foundry Networks FESX User Manual

Foundry Configuration Guide for the FESX, FSX, and FWSX
11 - 58 © Foundry Networks, Inc. December 2005
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 Figure 11.23. 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.
FastIron SuperX Router(config)# vlan 10 by port
FastIron SuperX Router(config-vlan-10)# untagged e 2/10
FastIron SuperX Router(config-vlan-10)# tagged e 2/11
FastIron SuperX Router(config-vlan-10)# exit
FastIron SuperX Router(config)# vlan 20 by port
FastIron SuperX Router(config-vlan-20)# tagged e 2/9
FastIron SuperX Router(config-vlan-20)# tagged e 2/11
FastIron SuperX Router(config-vlan-20)# exit
FastIron SuperX Router(config)# int e 2/11
FastIron SuperX Router(config-if-e1000-2/11)# dual-mode 10
FastIron SuperX Router(config-if-e1000-2/11)# exit
Syntax: [no] dual-mode [<vlan-id>]
Notes:
• If you do not specify a <vlan-id> in the dual mode command, the port’s 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.
The show vlan command displays a separate row for dual-mode ports on each VLAN. For example:
FastIron SuperX Router(config)# show vlan
Total PORT-VLAN entries: 3
Maximum PORT-VLAN entries: 16
legend: [S=Slot]
PORT-VLAN 1, Name DEFAULT-VLAN, Priority level0, Spanning tree Off
Untagged Ports: (S1) 1 2 3 4 5 6 7 8
Untagged Ports: (S2) 1 2 3 4 5 6 7 8 12 13 14 15 16 17 18 19
Untagged Ports: (S2) 20 21 22 23 24
Tagged Ports: None
Uplink Ports: None
DualMode Ports: None
PORT-VLAN 10, Name [None], Priority level0, Spanning tree Off
Untagged Ports: (S2) 10
Tagged Ports: None
Uplink Ports: None
DualMode Ports: (S2) 11
PORT-VLAN 20, Name [None], Priority level0, Spanning tree Off
Untagged Ports: None
Tagged Ports: (S2) 9
Uplink Ports: None
DualMode Ports: (S2) 11

Foundry Networks FESX Specifications

General

Brand	Foundry Networks
Model	FESX
Category	Switch
Language	English