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Configuration Guide - Ethernet Switching

S1720, S2700, S5700, and S6720 V200R012(C00 and C20)

This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, VLANs, VLAN aggregation, MUX VLAN, VLAN termination, Voice VLAN, VLAN mapping, QinQ, GVRP, VCMP, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, and Layer 2 protocol transparent transmission.

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Summary of VLAN Configuration Tasks

Summary of VLAN Configuration Tasks

Table 4-5 describes the VLAN configuration tasks. Figure 4-23 illustrates the logical relationship between configuration tasks.

Figure 4-23  Logical relationship between configuration tasks
Table 4-5  VLAN configuration tasks
Configuration Task Description

VLANs can isolate the hosts that do not need to communicate with each other, which improves network security, reduces broadcast traffic, and prevents broadcast storms.

Configuring Inter-VLAN Communication

After VLANs are assigned, users in different VLANs cannot directly communicate with each other. If users in different VLANs need to communicate, configure VLANIF interfaces to implement inter-VLAN Layer 3 connectivity.

Configuring a Traffic Policy to Implement Intra-VLAN Layer 2 Isolation

After VLANs are assigned, users in the same VLAN can directly communicate with each other. If some users in the same VLAN need to be isolated, configure MQC-based intra-VLAN Layer 2 isolation.


Intra-VLAN isolation can also be implemented using port isolation. For details about port isolation, see Configuring Port Isolation in "Ethernet Interface Configuration" S1720, S2700, S5700, and S6720 V200R012(C00&C20) Configuration Guide - Interface Management.

Configuring a Traffic Policy to Implement Inter-VLAN Layer 3 Isolation

After VLANIF interfaces are configured to implement inter-VLAN connectivity, users in different VLANs can communicate at Layer 3. If some users in different VLANs require unidirectional communication or need to be isolated, configure a traffic policy.

Configuring an mVLAN

To use the NMS to centrally manage devices, assign VLANs and configure a VLAN as the management VLAN.

Configuring Transparent Transmission of Protocol Packets in a VLAN

An interface sends protocol packets of all VLANs to the CPU for processing, affecting the forwarding efficiency. You can configure protocol packet transparent transmission in a VLAN so that the switch sends only protocol packets in a specified VLAN. This function improves the forwarding efficiency.

Updated: 2018-12-24

Document ID: EDOC1100038339

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