Configuring A Port-Based Vlan; Introduction To Port-Based Vlan - 3Com MSR 50 Series Configuration Manual

Configuring a
Port-Based VLAN
Introduction to
Port-Based VLAN
n
Before creating a VLAN interface, ensure that the corresponding VLAN already
exists. Otherwise, the specified VLAN interface will not be created.
This is the simplest and yet the most effective way of classifying VLANs. It groups
VLAN members by port. After added to a VLAN, a port can forward the packets of
the VLAN.
Port link type
Based on the tag handling mode, a port's link type can be one of the following
three:
Access port: the port only belongs to one VLAN, normally used to connect user
■
device;
Trunk port: the port can belong to multiple VLANs, can receive/send packets for
■
multiple VLANs, normally used to connect network devices;
Hybrid port: the port can belong to multiple VLANs, can receive or send
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packets for multiple VLANs, used to connect either user or network devices;
The differences between Hybrid and Trunk port:
A Hybrid port allows packets of multiple VLANs to be sent without the Tag
■
label;
A Trunk port only allows packets from the default VLAN to be sent without the
■
Tag label.
Default VLAN
You can configure the default VLAN for a port. By default, VLAN 1 is the default
VLAN for all ports. However, this can be changed as needed.
An Access port only belongs to one VLAN. Therefore, its default VLAN is the
■
VLAN it resides in and cannot be configured.
You can configure the default VLAN for the Trunk port or the Hybrid port as
■
they can both belong to multiple VLANs.
After deletion of the default VLAN using the undo vlan command, the default
■
VLAN for an Access port will revert to VLAN 1, whereas that for the Trunk or
Hybrid port remains, meaning the port can use a nonexistent VLAN as the
default VLAN.
Configured with the default VLAN, a port handles packets in the following ways:

Configuring a Port-Based VLAN

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