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Managing Virtual LANs 43
ports. For example, to create a VLAN for a GEN interface module
that resides in chassis slot 6 (when the switch fabric module is
installed in slot 8), you could configure the switch fabric module to
create a VLAN on backplane ports 11 and 12.
Features
Your CoreBuilder 9000 supports the VLAN features shown in Table 5.
Table 5 VLAN Features
Feature
Layer 2
Modules
and
Switch
Fabric
Module
Layer 3
Modules
Description
VLAN
mode:
allOpen or
allClosed
Yes Yes On a per-module basis, establishes a
less-restrictive VLAN environment (allOpen
mode) or a more secure VLAN environment
(allClosed mode). The VLAN mode dictates the
requirements for the port-, protocol-, and net-
work-based VLANs.
Per-port
IEEE
802.1Q
tagging
Yes Yes On a per-port basis, dictates that transmitted
frames are encapsulated and tagged as speci-
fied in the IEEE 802.1Q standard and that
received frames must be encapsulated and
tagged.
Port-based
VLANS
Yes Yes Determine VLAN membership based solely on
the port on which the frame was received. The
system provides a special port-based VLAN by
default, with all ports of all modules, called the
default VLAN
and supports
static
(user-config-
ured) VLAN configuration.
Protocol-
based
VLANs
No Yes Determine VLAN membership based on the
port on which the frame was received, as well
as the protocol of the frame. You can use the
protocol-based VLANs (and applied routing
interfaces) to establish routing between VLANs.
Network-
based
VLANs (IP
only)
No Yes Determine IP VLAN membership based on the
port on which the frame was received, as well
as the IP protocol and destination network
address of the frame.