3Com 4007 Implementation Manual page 257

DECnet counts as one protocol suite for DECnet VLANs.
The unspecified type of protocol suite counts as one, whether or not
the default VLAN or port-based VLANs are defined. Even if you have
only the unspecified protocol suite on the system, the limit is still 64
VLANs.
If you are using GVRP (for dynamic port-based VLANs), use the type
unspecified in the VLAN formula.
X25, SNA, Banyan VINES, and NetBIOS each count as one protocol
suite for their respective VLANs.
In addition to the limit on the number of VLANs, a limit of 15 different
protocols can be implemented by the protocol suites on the module. See
Table 53 later in this chapter for a list of the supported protocol suites
and the number of protocols within each suite.
The following examples show how to use the equation.
You have 7 protocol suites on the Multilayer Switching Module (IP,
Example 1
AppleTalk, unspecified for the default VLAN, and generic IPX, which
counts as 4 protocol suites):
(125 / 7) minus 3 = 14
In this configuration, the module supports a minimum of 14 VLANs. As
shown in Table 53, these 7 protocol suites use 8 protocols (3 IP,
2 AppleTalk, 1 unspecified, and 2 generic IPX).
You have 5 protocol suites: IP, unspecified, AppleTalk, IPX 802.2
Example 2
Sub-Network Access Protocol (SNAP), and IPX 802.3 Raw:
(125 / 5) minus 3 = 22
In this configuration, the Multilayer Switching Module supports a
minimum of 22 VLANs. As shown in Table 53, these 5 protocol suites use
7 protocols: 3 IP, 1 unspecified, 2 AppleTalk, 1 IPX 802.2 SNAP, and 0 IPX
802.3 Raw (because it does not use an Ethernet protocol type).
If you are upgrading from a Switch 4007 2.x release and the VLAN
resource limit is reached during a power-on with a serial port console
connection, you can use the Administration Console command
bridge vlan vlanAwareMode
taggedVlanPorts
information.
Key Guidelines for Implementation
to change the VLAN aware mode to
. See the section "VLAN Aware Mode" next for more
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