There are ten interface modes of Huawei switches, and there are no network engineers who don't know about them, right?

Huawei switches have a wide variety of interface modes and powerful functions to meet the requirements of different network environments. This topic describes in detail the various interface modes of Huawei switches, including Ethernet interfaces, optical fiber interfaces, stack interfaces, and management interfaces, and analyzes their application scenarios and configuration methods.

Ethernet interface

Ethernet interfaces are the most common type of interfaces in Huawei switches and are widely used in local area networks (LANs). Ethernet interfaces are typically classified into the following types:

1. Fast Ethernet (FE): The rate is 100 Mbit/s, which is commonly used for connection of access layer devices.
2. Gigabit Ethernet (GE) interface: The rate is 1000 Mbps, which is widely used in the access layer and aggregation layer.
3. 10GE (10 Gigabit Ethernet) interface: The rate is 10 Gbps, which is commonly used for high-speed connections between the core layer and data centers.

# 配置GE接口的基本信息
interface GigabitEthernet 0/0/1
 description Link to Server
 ip address 192.168.1.1 255.255.255.0
           

In the above configuration, we configure the IP address and description of a GE interface.

Fiber optic interface

Optical fiber interfaces are mainly used for long-distance transmission and have the characteristics of high bandwidth and low latency. Huawei switches support multiple optical interface types, including:

1. SFP（Small Form-factor Pluggable）接口：支持1 Gbps速率，常用于接入层和汇聚层。
2. SFP+ interface: supports 10 Gbps and is widely used in the core layer and data centers.
3. QSFP+ interface: supports 40 Gbps and is suitable for scenarios with ultra-high bandwidth requirements.

# 配置SFP+接口的基本信息
interface Ten-GigabitEthernet 1/0/1
 description Uplink to Core Switch
 ip address 10.1.1.1 255.255.255.0
           

In the above configuration, we configure the IP address and description of an SFP+ interface.

Stack interfaces

Stacking interfaces are used to stack multiple switches into a logical switch for unified management and resource sharing. The stack interfaces of Huawei switches include:

1. CSS（Cluster Switch System）接口：用于将多台交换机连接成一个集群。
2. iStack interface: Switches can be stacked through dedicated stacking cables to enhance network redundancy and scalability.

# 配置iStack堆叠接口
interface Stack-Port 1/1/1
 port interface GigabitEthernet 1/0/1
interface Stack-Port 1/1/2
 port interface GigabitEthernet 1/0/2
           

In the above configuration, we configure two GE interfaces as iStack stacking interfaces to implement the stacking of switches.

Management interfaces

Management interfaces are used for remote management and maintenance of switches, and typically include the following types:

1. Console interface: local management is implemented through serial port connection.
2. MGMT interface: a dedicated management interface that supports remote management.
3. VLAN interface: A virtual local area network (VLAN) can be configured to isolate and optimize management traffic.

# 配置MGMT接口的IP地址
interface MEth 0/0/1
 ip address 192.168.2.1 255.255.255.0
           

In the above configuration, we have configured the IP address for the management interface in order to manage the switch remotely.

PoE interface

The PoE (Power over Ethernet) interface can supply power to terminal devices through Ethernet cables, and is commonly used in devices such as IP phones and wireless access points (APs). Huawei switches support the following PoE standards:

1. IEEE 802.3af:每端口供电功率最大为15.4W。
2. IEEE 802.3at：每端口供电功率最大为30W。

# 配置PoE接口的基本信息
interface GigabitEthernet 0/0/3
 poe enable
 poe priority high
           

In the above configuration, we have enabled the PoE feature of the GE interface and set its power supply priority to high.

Link aggregation interface

Link Aggregation interfaces improve bandwidth and redundancy by bundling multiple physical interfaces into a single logical interface. Huawei switches support the following link aggregation modes:

1. Static aggregation: Manually configure an aggregation group.
2. LACP（Link Aggregation Control Protocol）：动态协商聚合组。

# 配置静态链路聚合接口
interface Eth-Trunk 1
 description Aggregate Link to Server
 mode static
interface GigabitEthernet 0/0/1
 eth-trunk 1
interface GigabitEthernet 0/0/2
 eth-trunk 1
           

In the above configuration, we create a static link aggregation group and add two GE interfaces to the aggregation group.

QinQ interface

The QinQ (802.1ad) interface enables multi-tenant isolation and cross-carrier transmission by encapsulating multiple VLAN tags in an Ethernet frame. Huawei switches support the following QinQ modes:

1. Basic QinQ: encapsulates a new VLAN label in addition to an existing VLAN label.
2. Selective QinQ：根据特定的条件选择性地封装VLAN标签。

# 配置Basic QinQ接口
interface GigabitEthernet 0/0/4
 port link-type trunk
 port trunk allow-pass vlan all
 qinq enable
 qinq vlan-translation 100 200
           

In the above configuration, we have enabled the QinQ feature of the GE interface and configured the translation rules for VLAN tags.

VXLAN interface

Virtual Extensible LAN (VXLAN) interfaces create a virtual Layer 2 network on an IP network to implement network virtualization and multi-tenant isolation in large-scale data centers. Huawei switches support the following VXLAN modes:

1. Layer 2 Gateway: Layer 2 network expansion
2. Layer 3 Gateway: implements routing and forwarding of Layer 3 networks.

# 配置VXLAN接口
vxlan interface Vxlan-Interface1
 vxlan id 1000
 source-ip 10.1.1.1
           

In the above configuration, we create a VXLAN interface and configure its VNI and source IP address.

SDN interface

The software-defined networking (SDN) interface separates the control plane from the data plane to achieve centralized control and automatic network management. Huawei switches support the following SDN interface types:

1. OpenFlow interface: The OpenFlow protocol is supported to implement fine-grained traffic control.
2. NETCONF interface: supports the NETCONF protocol to configure and manage network devices.

# 配置OpenFlow接口
openflow
 enable
 switch 1
 dpid 0000000000000001
           

In the above configuration, we have enabled the OpenFlow feature of the switch and configured its DPID.

MPLS interface

The Multiprotocol Label Switching (MPLS) interface inserts labels into IP packets to implement fast forwarding and traffic engineering. Huawei switches support the following MPLS interface types:

1. LDP（Label Distribution Protocol）接口：用于分发MPLS标签。
2. RSVP-TE（Resource Reservation Protocol-Traffic Engineering）接口：用于流量工程的标签分发。

# 配置MPLS LDP接口
mpls ldp
 enable
interface GigabitEthernet 0/0/5
 mpls ldp
           

In the above configuration, we have enabled the MPLS LDP feature and applied it to the GE interface.