Configuring Port-Based Vlan; Introduction To Port-Based Vlan - H3C S7500E Series Operation Manual

Operation Manual – VLAN
H3C S7500E Series Ethernet Switches

1.4 Configuring Port-Based VLAN

1.4.1 Introduction to Port-Based VLAN

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.
I. 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 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.
II. 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.
Note:
For the voice VLAN in automatic mode, the default VLAN of the corresponding port
cannot be configured as voice VLAN. Otherwise, the system prompts error information.
For information about voice VLAN, refer to
Configured with the default VLAN, a port handles packets in the following ways:
Voice VLAN Configuration.
1-6
Chapter 1 VLAN Configuration