Virtual Lan (Vlan) Features - HP J3245A Installation And Configuration Manual

Configuring the Switch
Configurable Features

Virtual LAN (VLAN) Features

Enables you to create up to eight port-based VLANs. A VLAN is a group of
ports designated by the Switch 800T as belonging to the same broadcast
domain. This feature enables you to configure port-based virtual LANs to help
isolate broadcast traffic and increase security. Typically, if VLANs are used,
all ports carrying traffic for a particular subnet address should be configured
to the same VLAN. For more on when, why, and how to use VLANs, refer to
"Virtual LANS (VLANs)" on page 7-14.
In the factory default state, VLANs are not configured. All ports belong to the
same broadcast/multicast domain. This domain is called "DEFAULT_VLAN"
and appears in the "VLAN Names" screen. You can create up to seven addi-
tional VLANs by adding new VLAN names, and then assigning one or more
ports to each VLAN. (The switch accepts a maximum of eight VLANs, includ-
ing the default VLAN.) Note that each port can be assigned to only one VLAN.
DEFAULT_VLAN can be renamed, but not deleted. Any ports not specifically
assigned to another VLAN will remain assigned to DEFAULT_VLAN.
N o t e
Before you delete a VLAN, you must re-assign its ports to another VLAN.
When VLANs are used, and are managed from an SNMP workstation, you
should configure the IPX and/or IP services for each VLAN. (Refer to pages
3-7 and 3-9.)
Spanning Tree protocol (STP), ABC, IGMP, and some other features operate
on a "per VLAN" basis. This means you must configure such features sepa-
rately for each VLAN in which you want them to operate.
For more information on VLANs and how to configure them, refer to "Virtual
LANs (VLANs)" on page 7-14.
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