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AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
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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).
Recovering the Telnet Login Password

Recovering the Telnet Login Password

You can use Telnet to remotely maintain and manage a device. If you forget the Telnet login password, log in to the device using the console port and set a new password.

Currently, the device supports two authentication modes for Telnet login.
  • AAA authentication: To log in to the device, you must have a user name and a password.
  • Password authentication: To log in to the device, you must have a password.

In this example, the configurations for VTY0 to VTY4 are the same.

NOTE:

After you log in to the device, run the display current-configuration configuration user-interface command to view the authentication mode of the VTY user. You can change the password without changing the authentication mode or configure a new authentication mode.

AAA Authentication

<Huawei> system-view
[Huawei] user-interface vty 0 4
[Huawei-ui-vty0-4] authentication-mode aaa
[Huawei-ui-vty0-4] quit
[Huawei] aaa
[Huawei-aaa] local-user huawei password irreversible-cipher Helloworld@6789
[Huawei-aaa] local-user huawei service-type telnet
[Huawei-aaa] local-user huawei privilege level 15

After the configuration is complete, you can use the user name huawei and password Helloworld@6789 to log in to the device.

Password Authentication

AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600 series as below:

# V200R003C01 and earlier versions.
<Huawei> system-view
[Huawei] user-interface console 0
[Huawei-ui-vty0-4] authentication-mode password
[Huawei-ui-vty0-4] set authentication password cipher Helloworld@6789
[Huawei-ui-vty0-4] return

# V200R005C00 and later versions.

<Huawei> system-view
[Huawei] user-interface console 0
[Huawei-ui-vty0-4] authentication-mode password
[Huawei-ui-vty0-4] set authentication password cipher
Enter Password(<8-128>):
Confirm password:
[Huawei-ui-vty0-4] return

After the configuration is complete, you can use the password Helloworld@6789 to log in to the device.

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Updated: 2019-05-10

Document ID: EDOC1000079719

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