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S12700 V200R010C00 Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring link aggregation, VLANs, Voice VLAN, VLAN mapping, QinQ, GVRP, MAC table, STP/RSTP/MSTP, SEP, and so on.

About This Document
Ethernet Switching Overview
- Introduction to Ethernet Switching
- Basic Concepts of Ethernet
- Switching on the Ethernet
  - Layer 2 Switching
  - Layer 3 Switching
- Application Environment
  - Building an Enterprise Network
MAC Address Table Configuration
- Introduction to the MAC Address
- Principles
- Application
- Configuration Task Summary
- Licensing Requirements and Limitations for MAC Address Tables
- Default Configuration
- Configuring a MAC Address Table
- Configuring MAC Address Flapping Prevention
  - Configuring a MAC Address Learning Priority for an Interface
  - Preventing MAC Address Flapping Between Interfaces with the Same Priority
- Configuring MAC Address Flapping Detection
- Configuring the Switch to Discard Packets with an All-0 MAC Address
- Configuring the Switch to Discard Packets That Do Not Match Any MAC Address Entry
- Enabling MAC Address-Triggered ARP Entry Update
- Enabling Port Bridge
- Configuring Re-marking of Destination MAC Addresses
- Maintaining the MAC Address Table
- Configuration Examples
- Common Misconfigurations
  - MAC Address Entries Failed to Be Learned on an Interface
- FAQs
Link Aggregation Configuration
- Introduction to Link Aggregation
- Principles
- Applications
- Configuration Task Summary
- Licensing Requirements and Limitations for Link Aggregation
- Default Settings
- Configuring Link Aggregation in Manual Mode
- Configuring Link Aggregation in LACP Mode
- Configuring Preferential Forwarding of Local Traffic in a CSS
- Creating an Eth-Trunk Sub-interface
- Configuring an E-Trunk
- Maintaining Link Aggregation
- Configuration Examples
- Common Configuration Errors
  - Traffic Is Unevenly Load Balanced Among Eth-Trunk Member Interfaces Because the Load Balancing Mode Is Incorrect
  - Eth-Trunk at Both Ends Cannot Be Up Because the Lower Threshold for the Number of Active Interfaces Is Incorrect
- FAQ
VLAN Configuration
- VLAN Overview
- Principles
- Applications
- Configuration Task Summary
- Licensing Requirements and Limitations for VLANs
- Default Configuration
- Configuring VLAN Technology
- Maintaining VLANs
- Configuration Examples
- Common Misconfigurations
- FAQ
VLAN Aggregation Configuration
- Introduction to VLAN Aggregation
- Principles
- Application Scenario
- Licensing Requirements and Limitations for VLAN Aggregation
- Default Configuration
- Configuring VLAN Aggregation
- Configuration Examples
  - Example for Configuring VLAN Aggregation
- FAQ
  - How Do I Implement Communication Between Specific Sub-VLANs in a Super-VLAN
  - How Should a Traffic Policy Be Configured in a Super-VLAN or Sub-VLAN to Make the Traffic Policy Take Effect
VLAN Switch Configuration
- Introduction to VLAN Switch
- Application Scenario
- Licensing Requirements and Limitations for VLAN Switch
- Default Configuration
- Configuring VLAN Switch
- Maintaining VLAN Switch
- Configuration Examples
  - Example for Implementing Inter-VLAN Communication Using VLAN Switch
MUX VLAN Configuration
- Introduction to MUX VLAN
- Licensing Requirements and Limitations for MUX VLANs
- Default Configuration
- Configuring the MUX VLAN
- Configuration Examples
  - Example for Configuring MUX VLAN on the Access Device
  - Example for Configuring MUX VLAN on the Aggregation Device
VLAN Termination Configuration
- Introduction to VLAN Termination
- Application Scenario
- Configuration Task Summary
- Licensing Requirements and Limitations for VLAN Termination
- Default Configuration
- Using a Dot1q Termination Sub-interface to Implement Inter-VLAN Communication
- Configuring a Dot1q Termination Sub-interface and Connecting It to an L2VPN
- Configuring a Dot1q Termination Sub-interface and Connecting It to an L3VPN
- Configuring a QinQ Termination Sub-interface and Connecting It to an L2VPN
- Configuring a QinQ Termination Sub-interface and Connecting It to an L3VPN
- Configuration Examples
Voice VLAN Configuration
- Introduction to Voice VLAN
- Typical Networking
- Principles
- Applicable Scenario
- Licensing Requirements and Limitations for Voice VLAN
- Default Configuration
- Configuring a MAC Address-based Voice VLAN
- Configuring a VLAN ID-based Voice VLAN
- Configuration Examples
  - Example for Configuring a MAC Address-based Voice VLAN (IP Phones Send Untagged Voice Packets)
  - Example for Configuring a VLAN ID-based Voice VLAN (IP Phones Send Tagged Voice Packets)
QinQ Configuration
- Introduction to QinQ
- Principles
- Applications
  - Public User Services on a Metro Ethernet Network
  - Enterprise Network Connection Through Private Lines
- Configuration Task Summary
- Licensing Requirements and Limitations for QinQ
- Configuring Basic QinQ
- Configuring Selective QinQ
- Configuring the TPID Value in an Outer VLAN Tag
- Configuring the Device to Add Double VLAN Tags to Untagged Packets
- Configuring QinQ Mapping
  - Configuring 1-to-1 QinQ Mapping
  - Configuring 2-to-1 QinQ Mapping
- Maintaining QinQ
  - Displaying VLAN Translation Resource Usage
- Configuration Examples
- Common Misconfigurations
  - QinQ Traffic Forwarding Fails Because the Outer VLAN Is Not Created
  - QinQ Traffic Forwarding Fails Because the Interface Does Not Transparently Transmit the Outer VLAN ID
- FAQ
VLAN Mapping Configuration
- Introduction to VLAN Mapping
- Principles
- Applications
- Licensing Requirements and Limitations for VLAN Mapping
- Configuring VLAN ID-based VLAN Mapping
- Configuring 802.1p Priority-based VLAN Mapping
- Configuring MQC-based VLAN Mapping
- Maintaining VLAN Mapping
  - Displaying VLAN Translation Resource Usage
- Configuration Examples
- Common Configuration Errors
  - Communication Failure After VLAN Mapping Configuration
GVRP Configuration
- Introduction to GVRP
- Principles
- Applications
- Licensing Requirements and Limitations for GVRP
- Default Configuration
- Configuring GVRP
- Maintaining GVRP
  - Clearing GVRP Statistics
- Configuration Examples
  - Example for Configuring GVRP
- FAQ
  - Why Is the CPU Usage High When VLANs Are Created or Deleted Through GVRP in Default Configuration?
VCMP Configuration
- Introduction to VCMP
- Principles
  - VCMP Concepts
  - Implementation
- Applicable Scenario
- Licensing Requirements and Limitations for VCMP
- Default Configuration
- Configuring VCMP
- Maintaining VCMP
  - Displaying VCMP Running Information
  - Clearing VCMP Running Information
- Configuration Examples
  - Example for Configuring VCMP to Implement Centralized VLAN Management
STP/RSTP Configuration
- Introduction to STP/RSTP
- Principles
- Applications
- Configuration Task Summary
- Licensing Requirements and Limitations for STP/RSTP
- Default Configuration
- Configuring Basic STP/RSTP Functions
- Setting STP Parameters that Affect STP Convergence
- Setting RSTP Parameters that Affect RSTP Convergence
- Configuring RSTP Protection Functions
- Setting Parameters for Interoperation Between Huawei and Non-Huawei Devices
- Maintaining STP/RSTP
  - Clearing STP/RSTP Statistics
  - Monitoring STP/RSTP Topology Change Statistics
- Configuration Examples
  - Example for Configuring Basic STP Functions
  - Example for Configuring Basic RSTP Functions
- FAQ
MSTP Configuration
- Introduction to MSTP
- MSTP Principles
- Application Environment
- Configuration Task Summary
- Licensing Requirements and Limitations for MSTP
- Default Configuration
- Configuring Basic MSTP Functions
- Configuring MSTP Multi-Process
- Configuring MSTP Parameters on an Interface
- Configuring MSTP Protection Functions
- Configuring MSTP Interoperability Between Huawei and Non-Huawei Devices
- Maintaining MSTP
  - Clearing MSTP Statistics
  - Monitoring the Statistics on MSTP Topology Changes
- Configuration Examples
- FAQ
VBST Configuration
- Introduction to VBST
- Principles
- Applicable Scenario
- Configuration Task Summary
- Licensing Requirements and Limitations for VBST
- Default Configuration
- Configuring Basic VBST Functions
- Setting VBST Parameters That Affect VBST Convergence
- Configuring Protection Functions of VBST
- Setting Parameters for Interworking Between a Huawei Datacom Device and a Non-Huawei Device
- Maintaining VBST
  - Displaying VBST Running Information and Statistics
  - Clearing VBST Statistics
- Configuration Examples
  - Example for Configuring VBST
SEP Configuration
- Introduction to SEP
- Principles
- Applications
- Configuration Task Summary
- Licensing Requirements and Limitations for SEP
- Configuring Basic SEP Functions
- Specifying an Interface to Block
- Configuring SEP Multi-Instance
- Configuring the Topology Change Notification Function
- Maintaining SEP
  - Clearing SEP Statistics
- Configuration Examples
RRPP Configuration
- Introduction to RRPP
- Principles
- Application Scenarios
- Configuration Task Summary
- Licensing Requirements and Limitations for RRPP
- Default Configuration
- Configuring RRPP
- Configuring RRPP Snooping
- Maintaining RRPP
  - Clearing RRPP Statistics
- Configuration Examples
- Common Configuration Errors
  - A Loop Occurs After the RRPP Configuration is Complete
  - After the Primary Port of a Transit Node on an RRPP Ring Network Becomes Down and Then Recovers, the Transit Node and Other Transit Nodes Cannot Register With the Master Node
- FAQ
ERPS (G.8032) Configuration
- Introduction to ERPS
- Principles
- Applicable Scenario
- Configuration Task Summary
- Licensing Requirements and Limitations for ERPS
- Default Settings
- Configuring ERPSv1
- Configuring ERPSv2
- Maintaining ERPS
  - Clearing ERPS Statistics
- Configuration Examples
  - Example for Configuring ERPS Multi-instance
  - Example for Configuring Intersecting ERPS Rings
- Common Configuration Errors
  - Traffic Forwarding Fails in an ERPS Ring
LDT and LBDT Configuration
- Introduction to LBDT and LDT
- Principles
- Applicable Scenario
- Licensing Requirements and Limitations for LDT and LBDT
- Default Configuration
- Configuring LDT to Detect Loops
- Configuring Automatic LBDT
- Configuring Manual LBDT
- Configuration Examples
Layer 2 Protocol Transparent Transmission Configuration
- Introduction to Layer 2 Protocol Transparent Transmission
- Principles
- Application Environment
- Configuration Task Summary
- Licensing Requirements and Limitations for Layer 2 Protocol Transparent Transmission
- Configuring Interface-based Layer 2 Protocol Transparent Transmission
- Configuring VLAN-based Layer 2 Protocol Transparent Transmission
- Configuring QinQ-based Layer 2 Protocol Transparent Transmission
- Configuration Examples
- FAQ

Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).

Application Scenario

Application Scenario

On the network shown in Figure 6-1, PC1 in VLAN 2 and PC2 in VLAN 3 need to communicate with each other.

Figure 6-1 Using VLAN Switch to implement inter-VLAN communication

Switch-vlan can be configured on SwitchA to implement inter-VLAN communication. After switch-vlan is configured, user packets are forwarded along the specified path. SwitchA is configured to change VLAN 2 in packets received by Port2 to VLAN 3 and send them through Port3, and to change VLAN 3 in packets received by Port3 to VLAN 2 and send them through Port2. In this manner, switch-vlan implements communication between VLAN 2 and VLAN 3.

If SwitchA is a Layer 3 switch, you can also use a VLANIF interface to implement inter-VLAN communication. If SwitchA is a Layer 2 switch, you can only use switch-vlan to implement inter-VLAN communication.

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Updated: 2022-05-23

Document ID: EDOC1000142081

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