R0106-HP MSR Router Series Layer 2 - LAN Switching Configuration Guide(V7)

Ste

Command

Remarks

8. (Optional.) Restore the

default settings for the VLAN

interface.

default N/A

9. (Optional.) Bring up the

VLAN interface.

undo shutdown By default, a VLAN interface is up.

Configuring port-based VLANs

Introduction

Port-based VLANs group VLAN members by port. A port forwards packets from a VLAN only after it is

assigned to the VLAN.

Port link type

You can configure the link type of a port as access, trunk, or hybrid. The link types use the following

VLAN tag handling methods:

• Access—An access port can forward packets from only one VLAN and send these packets

untagged. An access port can connect a terminal device that does not support VLAN packets or is

used in scenarios that do not distinguish VLANs.

• Trunk—A trunk port can forward packets from multiple VLANs. Except packets from the port VLAN

ID (PVID), packets sent out of a trunk port are VLAN-tagged. Ports connecting network devices are

typically configured as trunk ports.

• Hybrid—A hybrid port can forward packets from multiple VLANs. A hybrid port allows traffic from

some VLANs to pass through untagged and traffic from other VLANs to pass through tagged.

PVID

The PVID identifies the default VLAN of a port.

When you configure the PVID on a port, follow these restrictions and guidelines:

• An access port can join only one VLAN. The VLAN to which the access port belongs is the PVID of

the port.

• A trunk or hybrid port allows multiple VLANs and supports PVID configuration.

• When you use the undo vlan command to delete the PVID of a port, the following events occur

depending on the port link type:

{ For an access port, the PVID of the port changes to VLAN 1.

{ For a hybrid or trunk port, the PVID setting of the port does not change.

You can use a nonexistent VLAN as the PVID for a hybrid or trunk port, but not for an access port.

• HP recommends that you set the same PVID for local and remote ports.

• Make sure a port is assigned to its PVID. Otherwise, when the port receives frames tagged with the

PVID or untagged frames, the port filters out these frames.