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S1720GFR, S2700, S5700, and S6720 V200R010C00 Web-based Configuration Guide

This document describes the configuration and maintenance of device through the web network management system. The web network management system provides the functions of viewing device information and managing the entire system, interfaces, services, ACL, QoS, routes, security, and tools.
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LoopBack

LoopBack

A LoopBack interface is a logical interface. It is always Up. The LoopBack interface is usually used in LoopBack test.

Context

According to the TCP/IP protocol suite, the IP addresses in the network segment 127.0.0.0 are LoopBack addresses. The system automatically creates an interface using loopback address 127.0.0.1. This interface is used to receive datagrams sent to the local device.

Procedure

  • Query LoopBack interface information.
    1. Choose Interface Management > LoopBack in the navigation tree to open the LoopBack Interface page.
    2. Enter the number of the interface that you want to query, for example, 12.
    3. Click Query to display all matching records.

      NOTE:
      If you do not enter any interface number, the system displays all loopback interfaces.

  • Create a LoopBack interface.
    1. Choose Interface Management > LoopBack in the navigation tree to open the LoopBack Interface page.
    2. Click Create to open the Create LoopBack page, as shown in Figure 2-105.

      Figure 2-105  Create LoopBack

      Table 2-55 describes the parameters on the Create LoopBack page.

      Table 2-55  Create LoopBack

      Parameter

      Description

      LoopBack interface name

      Indicates the number of the LoopBack interface. This parameter is mandatory.

      IPv4 Address

      Indicates the IPv4 address of the LoopBack interface, for example, 10.10.10.1.

      Mask

      Indicates the mask of the IP address. Select a mask from the drop-down list box, for example, 24 (255.255.255.0).

      IPv6 Address/PreFixLength

      Indicates an IP address. Click Add to enter an IPv6 address (for example, FC00:0:130F:0:0:9C0:876A:130B) and prefix length (ranging from 1 to 128).

      NOTE:

      IPv6 addresses can be added and deleted as required.

      Description

      Indicates the description of the LoopBack interface.

    3. Set parameters.
    4. Click OK.
  • Modify the LoopBack interface configuration.
    1. Choose Interface Management > LoopBack in the navigation tree to open the LoopBack Interface page.
    2. Select a record that you want to modify and click to open the Modify LoopBack page, as shown in Figure 2-106.

      Figure 2-106  Modify LoopBack

      NOTE:
      • Table 2-55 describes the parameters on the Modify LoopBack page.
      • The LoopBack interface name cannot be changed.

    3. Set parameters.
    4. Click OK.
  • Delete a LoopBack interface.
    1. Choose Interface Management > LoopBack in the navigation tree to open the LoopBack Interface page.
    2. Select a record that you want to delete and click Delete. The system asks you whether to delete the record.
    3. Click OK.
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Updated: 2019-08-21

Document ID: EDOC1000114003

Views: 50710

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