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Fat AP and Cloud AP V200R010C00 Command Reference

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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).
bfd one-arm-echo

bfd one-arm-echo

Function

The bfd one-arm-echo command configures the BFD echo function.

The undo bfd command deletes a specified BFD session and cancels the binding.

by default, the BFD echo function is not configured.

Format

bfd session-name bind peer-ip peer-ip interface interface-type interface-number [ source-ip ip-address ] one-arm-echo

undo bfd session-name

Parameters

Parameter

Description

Value

session-name

Specifies the name of a BFD session supporting the BFD echo function.

The value is a string of 1 to 15 case-insensitive characters without spaces.

peer-ip peer-ip

Specifies the peer IP address bound to the BFD session.

The value is in dotted decimal notation.

interface interface-type interface-number

Specifies the type and number of the interface bound to a BFD session.

  • interface-type specifies the interface type.

  • interface-number specifies the interface number.

-

source-ip ip-address

Indicates the source IP address carried in BFD packets. If the source IP address is not specified, the system searches the local routing table for an outbound interface from which the peer IP address can be reached. The IP address of this outbound interface is used as the source IP address of BFD packets sent by the local end. Generally, this parameter is not required.

-

one-arm-echo

Indicates a BFD session supporting the BFD echo function.

-

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Among two directly connected devices, one device supports BFD, whereas the other device does not support BFD. To rapidly detect forwarding failures between the two devices, configure a BFD session supporting the BFD echo function on the BFD-supporting device. The BFD-supporting device sends an Echo Request packet to the remote device. The remote device sends the Echo Request packet back along the same path to detect the forwarding link connectivity.

Prerequisites

Global BFD has been enabled using the bfd command in the system view.

Precautions

The difference between a BFD session supporting the BFD echo function and a common BFD session is as follows:

  • When configuring a BFD session supporting the BFD echo function, you can only specify local discr-value in the discriminator command.

  • You can only run the min-echo-rx-interval command to change the interval for receiving BFD packets.

  • If the IP address of an outbound interface is changed after a BFD session is configured, the source IP address of BFD packets is not updated.

  • The BFD echo function is only applicable to single-hop BFD sessions.

  • After the bfd one-arm-echo command is executed, run the commit command to commit the configuration to make the configuration take effect.

Example

# Configure a BFD session test supporting the BFD echo function.

<Huawei> system-view
[Huawei] bfd test bind peer-ip 10.1.1.1 interface vlanif 100 one-arm-echo
[Huawei-bfd-session-test] discriminator local 100
[Huawei-bfd-session-test] commit
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Updated: 2019-11-21

Document ID: EDOC1100064352

Views: 205350

Downloads: 122

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