VLAN Configuration
12-12 VLAN Operation and Network Applications

12.8.2 Switch Without VLANs

When the switch is powered up, the switch uses its default settings to switch frames like an 802.1Q
switch. In this default configuration, all ports are a member of the default VLAN (VLAN 1)
including the virtual Host Data Port of the switch, so any port can be used to manage the device as
shown in Figure 12-3.
Figure 12-3 Switch Management with Only Default VLAN

12.8.3 Switch with VLANs

If the switch is to be configured for multiple VLANs, it may be desirable to configure a
management-only VLAN. This allows a management station connected to the management VLAN
to manage all ports on the switch and make management secure by preventing management via
ports assigned to other VLANs.
Figure 12-4 shows an example of a switch configured with port 1 on the Management VLAN port
and the other users belonging to VLANs A, B, and C.
NOTE: The switch’s virtual Host Data Port, like any other port, has VLAN membership
that is configurable. For manageability of the device to be maintained, this port must be
a member of the same VLAN as the port to which the management station is connected.
1
3 6
2
4
5

802.1Q Switch

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NOTE: All ports, including the virtual Host Data Port, are
members of the default VLAN. Therefore, any station
shown may be used as the management station.
Host
Data
Port