3Com 4007, Command Reference Manual

Page: 190 / 574

190 C
HAPTER
10: V
IRTUAL
LAN
S
(VLAN
S
)
✓
Layer 2
Switching
Modules
Multilayer
Switching
Modules
bridge vlan define Creates a port-based VLAN on Layer 2 Switching 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.
To define VLANs on Multilayer Switching Modules, see the previous
“bridge vlan define” command in this chapter.
Valid Minimum Abbreviation
b v def
Important Considerations
■
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.
■
The list of ports includes the front-panel ports and both backplane
ports (even though only the lower-numbered backplane port is
enabled by default).
■
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 modules
and on the switch fabric
module.
■
When you define the VLAN on a 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 than one VLAN.
■
When you define the VLAN on the switch fabric module, you must
specify the switch fabric module’s backplane port that is connected
to the switching module’s backplane port (it is slot-dependent). The
switch fabric module port must also be tagged if you have more
than one VLAN.