Chapter 2 Isolate-User-Vlan Configuration; Isolate-User-Vlan Overview; Introduction To Isolate-User-Vlan; Isolate-User-Vlan Packets Forwarding Process - H3C S7500 Series Operation Manual

Operation Manual – Extended VLAN Application
H3C S7500 Series Ethernet Switches

Chapter 2 Isolate-User-VLAN Configuration

When configuring isolate-user-VLAN, go to these sections for information you are
interested in:

Isolate-User-VLAN Overview

Isolate-User-VLAN Configuration
Displaying Isolate-User-VLAN Configuration
Isolate-User-VLAN Configuration Example
2.1 Isolate-User-VLAN Overview

2.1.1 Introduction to Isolate-User-VLAN

Isolate-user-VLAN is designed for saving VLAN resource by means of copying MAC
address entries among the MAC address tables of VLANs, utilizing the feature that a
Hybrid port can remove the VLAN tags of packets of multiple VLANs.
Isolate-user-VLAN adopts Layer 2 VLAN structure, and you need to configure two
types of VLANs, isolate-user-VLAN and secondary VLAN.
An isolate-user-VLAN corresponds to multiple secondary VLANs. By configuring ports
as Hybrid ports, you can make ports of all secondary VLANs and the uplink port of the
switch all included in the isolate-user-VLAN. At the same time, you should configure
that the uplink port removes the VLAN tags of all secondary VLAN packets when
forwarding them.
In this case, for the upper layer switch, all the packets received from the lower stream
are without VLAN tags. Therefore, the switch can reset the local VLAN structure to save
VLAN resource without considering the VLAN configuration in the lower layer.

2.1.2 Isolate-User-VLAN Packets Forwarding Process

Figure 2-1
describes the isolate-user-VLAN packets forwarding process based on this figure.
I. Configure Switch B
Configure port Ethernet 1/0/4 as a Hybrid port, with the default VLAN ID being 3.
This port belongs to both VLAN 3 and VLAN 5 (the isolate-user-VLAN), and
performs untag operation (removing of VLAN tag) on packets coming from VLAN 3
and VLAN 5.
Configure port Ethernet 1/0/1 as a Hybrid port, with the default VLAN ID being 5.
This port belongs to both VLAN 3 and VLAN 5, and performs untag operation
(removing of VLAN tag) on packets coming from VLAN 3 and VLAN 5.
is the diagram for isolate-user-VLAN application. The following content
Chapter 2 Isolate-User-VLAN Configuration
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