3Com 3500 - page 347

bridge vlan define (3500/9000 Layer 3) 347
■When you define the VLAN on the Layer 3 switching module, you
must specify any front-panel ports in the VLAN as well as the
module’s backplane port. The specified backplane port must also
be tagged if you have more than one VLAN a nd plan to
communicate with VLANs on other modul es on the
CoreBuilder 9000 through the switch fabric module.
■When you define the VLAN on the switch fabric module, you must
specify which switch fabric module backplane port is connected to
the module backplane port. The switch fabric module backplane
port must also be tagged if you have more tha n one VLAN.
■When you use a Layer 3 switching module to establish routing
between VLANs on other switching module s, you can configure
the backplane port of the Layer 3 switching module as part of the
VLANs and then define a routing interface for each VLAN. One
VLAN equals one network or subnetwork.
■For configurations that include FDDI port s, if you plan for your VLAN
to include FDDI DAS ports, you must specify t he lowest-numbered
port in the DAS pair when defining the ports in the VLAN. See
Chapter 8.
■Specify ? to see the port summary (for example, to see whether ports
are associated with a trunk), and then enter the appropriate port
numbers.
■The VID is used as the IEEE 802.1Q tag if tagging is enabled for a port.
Options
Prompt Description Possible Values [Default]
VID Unique, user-defined integer
used by management
operations
■If the default
VLAN exists,
2– 4094
■If the default
VLAN does not
exist, 1 to
redefine the
default VLAN,
or 2 – 4094 for
other VLANs
Next available
VID