346
C
HAPTER
14: V
IRTUAL
LAN
S
(VLAN
S
)
■
You must specify a VID in the range from 2 through 4094. You can no
longer define a VLAN other than the default VLAN with a VID of 1.
VID 1 is reserved for the default VLAN only as of Release 3.0.0. (As of
Release 3.0.0, the default VLAN always uses the name
Default
and
the protocol type
unspecified
.) If you delete the default VLAN, you
can redefine it with VID 1 only.
■
You cannot delete a VLAN that has a routing interface associated with
it.
■
If you plan to use the trunking feature or the MPLA feature, define the
appropriate trunks
before
you define your VLANs. See Chapter 11 for
more information.
■
If you plan for your VLAN to include trunk ports, specify the anchor
port (lowest-numbered port) that is associated with the trunk. For
example, if ports 1 through 3 are associated with a trunk, specify
1
to
define the VLAN to include all of the physical ports in the trunk (ports
1 through 3). If you have not defined trunks, specify one or more port
numbers, or
all
to assign all ports to the VLAN interface.
■
If a port is shared by another VLAN, verify that if tagging is the only
distinguishing characteristic between the VLANs, the specified tag
type is not in conflict with the port’s tag type in another VLAN (that is,
there is only one port that is tagged
none
).
■
Do not use this command if you want GVRP to dynamically create
IEEE 802.1Q port-based VLANs. Instead, explicitly enable the GVRP
state for the participating ports and enable the GVRP state for the
entire system. To set the per-port GVRP state, use the
bridge port
gvrpState
.
(See Chapter 10.) To set the bridge-wide GVRP state, use
the
bridge gvrpState
command. (See Chapter 9.)
■
Whether you are bridging or routing, you can select more than one
protocol suite per VLAN and specify one protocol at each of the
prompts. Use the protocol type of
unspecified
to create a port-based
VLAN.
■
The IPX protocol type
IPX-802.2-SNAP
is available for both the
CoreBuilder 3500 system and the CoreBuilder 9000 Layer 3 switching
modules.
■
For the CoreBuilder 9000, keep the following considerations 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 module
and
on the switch
fabric module.
