Port-Based Virtual LANs (VLANs) and GVRP

Port-Based Virtual LANs (Static VLANs)

HP

 

HP

Procurve

 

Procurve

Switch

 

Switch

Tagged VLAN Link

Untagged VLAN Links

Figure 11-4. Example of Tagged and Untagged VLAN Technology in the SameNetwork

For more information on VLANs, refer to:

“Overview of Using VLANs” (page 11-6)

“Menu: Configuring VLAN Parameters (page 11-10)

“CLI: Configuring VLAN Parameters” (page 11-10)

“Web: Viewing and Configuring VLAN Parameters” (page 11-21)

“VLAN Tagging Information” (page 11-22)

“Effect of VLANs on Other Switch Features” (page 11-31)

“VLAN Restrictions” (page 11-32)

Overview of Using VLANs

VLAN Support and the Default VLAN

In the factory default configuration, VLAN support is enabled and all ports on the switch belong to the default VLAN (named DEFAULT_VLAN). This places all ports in the switch into one physical broadcast domain. In the factory- default state, the default VLAN is the primary VLAN.

You can partition the switch into multiple virtual broadcast domains by adding one or more additional VLANs and moving ports from the default VLAN to the new VLANs. (The switch supports up to 256 VLANs.) You can change the name of the default VLAN, but you cannot change the default VLAN’s VID (which is always “1”). Although you can remove all ports from the default VLAN, this VLAN is always present; that is, you cannot delete it from the switch.

The Primary VLAN

Because certain features and management functions run on only one VLAN in the switch, and because DHCP and Bootp can run per-VLAN, there is a need for a dedicated VLAN to manage these features and ensure that multiple instances of DHCP or Bootp on different VLANs do not result in conflicting

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