352 CHAPTER 14: VIRTUAL LANS (VLANS)
bridge vlan define
(3900/9300/9400/
3500
✓ 9000
✓ 9400
✓ 3900
✓ 9300
9000 Layer 2)
Creates a port-based VLAN on standalone systems or the
CoreBuilder 9000 Layer 2 modules. When you configure a port-based
VLAN, you assign a VLAN ID (VID), a set of bridge ports, and, optionally,
IEEE 802.1Q tagging.
For details about this command on the CoreB uilder 3500 and
CoreBuilder 9000 Layer 3 modules, see “br idge vlan define (3500/9000
Layer 3)” earlier in this chapter.
Valid Minimum Abbreviation
b v def
Important Considerations
■On the SuperStack II Switch 3900 o r 9300, you can define a maxi mum
of 127 port-based VLANs on a single system.
■By default, all ports are defined to be part of the default VLAN, which
always uses a VID of 1 and the name Default as of Release 3.0.0. If
you delete the default VLAN, you can redefine it with VID 1 only.
■You cannot delete a VLAN that has an IP interface associated with it.
■The VID is used as the IEEE 802.1Q tag for a port if tagging is enabled.
■On the CoreBuilder 9000, the list of ports include s the front-panel
ports and both backplane ports (even tho ugh only the
lower-numbered backplane port is enabled by default). On the
SuperStack II Switch 3900, the list of ports incl udes the 24 or 36
10/100 ports and any Gigabit Ethernet p orts in use.
■For the CoreBuilder 9000, keep the following co nsiderations in mind:
■When you define a VLAN on a switching module and other
switching modules in the system also define this VLAN, you must
define the VLAN on both the switching modu le and on the switch
fabric module.
■When you define the VLAN on the Layer 2 switching module, you
must specify any front-panel ports in the VLAN as well as the
module’s lower-numbered backplane port. The specified backplane
port must also be tagged if you have more tha n one VLAN.
■When you define the VLAN on the switch fabric module, you must
specify the switch fabric module backplane port that is connected
to the switching module’s backplane port. The switch fabric
module port must also be tagged if you have more than one VLAN.