HP 2500 manual Overview of Using VLANs, Vlan Support and the Default Vlan, Which Vlan Is Primary?

Configuring Advanced Features

Port-Based Virtual LANs (Static VLANs)

Switch

2524 Switch 2524

Untagged VLAN Links Non-802.1Q-

compliant switch

Switch 2524

Tagged VLAN Link

Switch

Switch 2512

2512

Figure 9-42. Example of Tagged and Untagged VLAN Technology in the Same Network

For more information on VLANs, refer to:

■“Overview of Using VLANs” (page 9-53)

■“Menu: Configuring VLAN Parameters (page 9-57)

■“CLI: Configuring VLAN Parameters” ( page 9-57)

■“Web: Viewing and Configuring VLAN Parameters” (page 9-68)

■“VLAN Tagging Information” (page 9-69)

■“Effect of VLANs on Other Switch Features” (page 9-73)

■“VLAN Restrictions” (page 9-75)

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 30 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.

Which VLAN Is Primary?

Because certain features and management functions, such as single IP- address stacking, run on only one VLAN in the switch, and because DHCP and Bootp can run per-VLAN, there is a need to ensure that multiple instances of

9-53