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NE40E-M2 V800R010C10SPC500 Configuration Guide - Interface and Data Link 01

This is NE40E-M2 V800R010C10SPC500 Configuration Guide - Interface and Data Link
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Overview of Interface Management

Overview of Interface Management

This section provides the physical and logical interfaces supported by the NE40E and describes the interface views and prompts and common link protocols and access technologies.

Interface Types

The Router exchanges data and interacts with other devices on a network through interfaces. Interfaces are classified into physical and logical interfaces.

  • Physical Interfaces

    Physical interfaces physically exist on boards. They are divided into the following types:

    • LAN interfaces: interfaces through which the Router can exchange data with the devices on a LAN.
    • WAN interfaces: interfaces through which the Router can exchange data with remote devices on a WAN.
  • Logical Interfaces

    Logical interfaces are manually configured interfaces that do not exist physically. Logical interfaces can be used to exchange data.

The management network port of the IPU does not forward services.

Interface Views and Prompts

The NE40E supports the command views and prompts of physical interfaces in Table 2-1 and the command views and prompts of logical interfaces in Table 2-2.
Table 2-1 Command views and prompts of physical interfaces supported by the NE40E

Interface Name

Command View

Accessing Command

Prompt

Ethernet interface

Ethernet interface view

Run the interface ethernet 0/1/0 command in the system view.

[~HUAWEI-Ethernet0/1/0]

GE interface

GE interface view

Run the interface gigabitethernet 0/1/0 command in the system view

[~HUAWEI-GigabitEthernet0/1/0]

10GE interface

10GE interface view

Run the interface 10GE 0/1/0 command in the system view

[~HUAWEI-10GE0/1/0]

40GE interface

40GE interface view

Run the interface 40GE 0/1/0 command in the system view

[~HUAWEI-40GE0/1/0]

100GE interface

100GE interface view

Run the interface 100GE 0/1/0 command in the system view

[~HUAWEI-100GE0/1/0]

40GE interface

40GE interface view

Run the interface 40GE 0/1/0 command in the system view

[~HUAWEI-40GE0/1/0]

XGigabitEthernet interface

XGigabitEthernet interface view

Run the interface XGigabitEthernet 0/1/0 command in the system view

[~HUAWEI-XGigabitEthernet0/1/0]

POS interface

POS interface view

Run the interface pos 0/3/0 command in the system view

[~HUAWEI-Pos0/3/0]

50GE interface

50GE interface view

Run the interface 50GE 0/1/0 command in the system view.

[~HUAWEI-50GE0/1/0]

50|100GE interface

50|100GE interface view

Run the interface 50|100GE 0/1/0 command in the system view.

[~HUAWEI-50|100GE0/1/0]

FlexE-50G interface

FlexE-50G interface view

Run the interface FlexE-50G 0/1/0 command in the system view.

[~HUAWEI-FlexE-50G0/1/0]

FlexE-50|100G interface

FlexE-50|100G interface view

Run the interface FlexE-50|100G 0/1/0 command in the system view.

[~HUAWEI-FlexE-50|100G0/1/0]

Table 2-2 Command views and prompts of logical interfaces

Interface Name

Command View

Accessing Command

Prompt

Sub-interface

Sub-interface view

Run the interface gigabitethernet 0/1/0.1 command in the system view

[~HUAWEI-GigabitEthernet0/1/0.1]

Eth-Trunk interface

Eth-Trunk interface view

Run the interface eth-trunk 0 command in the system view

[~HUAWEI-Eth-Trunk0]

Loopback interface

Loopback interface view

Run the interface loopback 2 command in the system view

[~HUAWEI-LoopBack2]

Null interface

Null interface view

Run the interface null 0 command in the system view

[~HUAWEI-NULL0]

IP-Trunk interface

IP-Trunk interface view

Run the interface ip-trunk 0 command in the system view

[~HUAWEI-Ip-Trunk0]

Tunnel interface

Tunnel interface view

Run the interface tunnel 0/1/0 command in the system view

[~HUAWEI-Tunnel0/1/0]

FlexE interface

FlexE interface view

Run the interface FlexE 0/3/129 command in the system view.

[~HUAWEI-FlexE0/3/129 ]

Commonly-used Link Protocols and Access Technologies

The link layer is responsible for accurately sending data from a node to a neighboring node. It receives packets from the network layer, encapsulates the packets in frames, and then sends the frames to the physical layer.

Major link layer protocols supported by the NE40E are listed as follows:

  • Ethernet

    Currently, the LAN mostly refers to the Ethernet. The Ethernet is a broadcast network, which is flexible and simple in configuration and is easy to expand. The Ethernet is widely used.

  • Trunk

    Trunks can be classified into Eth-Trunks and IP-Trunks. An Eth-Trunk must be composed of Ethernet links, and an IP-Trunk must be composed of POS links.

    The trunk technology has the following advantages:

    • Bandwidth increase: The bandwidth of an IP-Trunk is the total bandwidth of all member interfaces.
    • Reliability enhancement: When a link fails, other links in the same trunk automatically take over the services on the faulty link to prevent traffic interruption.
  • PPP

    The Point-to-Point Protocol (PPP) is used to encapsulate IP packets on serial links. It supports both the asynchronous transmission of 8-bit data without the parity check and the bit-oriented synchronous connection.

    PPP consists of the Link Control Protocol (LCP) and the Network Control Protocol (NCP). LCP is used to create, configure, and test links; NCP is used to control different network layer protocols.

  • HDLC

    The High-Level Data Link Control (HDLC) is a suite of protocols that are used to transmit data between network nodes. HDLC is widely used at the data link layer.

    In HDLC, the receiver responds with an acknowledgement when it receives frames transmitted over the network. In addition, HDLC manages data flows and the interval at which data packets are transmitted.

interface flapping control

The status of an interface on a device may alternate between Up and Down for various reasons, including physical signal interference and incorrect link layer configurations. The changing status causes Multiprotocol Label Switching (MPLS) and routing protocols to flap. As a result, the device may break down, causing network interruption. Control-flap controls the frequency of interface status alternations between Up and Down to minimize the impact on device and network stability.

The following two control modes are available.

Table 2-3 Flapping control modes

Control Mode

Function

Usage Scenario

control-flap

Controls the frequent flappings of interfaces from the network layer to minimize the impact on device and network stability.

  • This control mode is interface-specific.
  • This control mode suppresses interface flappings from the network layer and reports the flappings to the routing management module, thereby improving network-layer stability.
  • This control mode allows you to precisely configure parameters based on service requirements.
  • This control mode involves complex algorithms and is highly demanding to use.

damp-interface

Controls the frequent flappings of interfaces at the physical layer to minimize the impact on device and network stability.

  • This function is supported globally or on a specified interface.
  • This control mode suppresses the flappings from the physical layer, thereby improving link-layer and network-layer stability.
  • This control mode prevents the upper-layer protocols from frequently alternating between enabled and disabled, thereby reducing the consumption of CPU and memory resources.
  • This control mode does not involve any complex algorithms and is easy to use.
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Updated: 2019-01-02

Document ID: EDOC1100058380

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