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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 bind peer-ip source-ip auto

bfd bind peer-ip source-ip auto

Function

The bfd bind peer-ip source-ip auto command creates a static BFD session with automatically negotiated discriminators.

The undo bfd session-name command deletes a specified BFD session.

By default, no static BFD session with automatically negotiated discriminators is established.

Format

bfd session-name bind peer-ip ip-address [ interface interface-type interface-number ] source-ip ip-address auto

undo bfd session-name

Parameters

Parameter

Description

Value

session-name

Specifies the name of a BFD session.

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

peer-ip ip-address

Specifies the peer IP address bound to the BFD session.

-

interface interface-type interface-number

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

  • interface-type specifies the type of the interface.

  • interface-number specifies the number of the interface.

-

source-ip ip-address

Indicates the source IP address carried in BFD packets, that is, IP address of the outbound interface.

-

auto

Enables automatic negotiation of local and remote discriminators.

-

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

To fast detect and monitor links, when the peer device uses dynamic BFD and the local device wants to communicate with the peer device and detect static routes, run the bfd bind peer-ip source-ip auto command to create a BFD session with automatically negotiated discriminators.

When creating a static BFD session with automatically negotiated discriminators, pay attention to the following points:

  • If only the peer IP address is specified, BFD is configured to detect the multi-hop link.

  • If the peer IP address and local interface are specified, BFD is configured to detect the single-hop link, that is, a specific route with this interface as the outbound interface and with the peer IP address as the next-hop address.

  • The source IP address prevents BFD packets from being discarded incorrectly when the URPF function is enabled. Ensure that the source IP address is correct. The system only checks whether the source IP address is valid (for example, it cannot be a multicast or broadcast address) without checking correctness.

Prerequisites

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

Precautions

  • When creating a BFD session, bind the BFD session to the peer IP address and the local address.

  • When the BFD configuration items are created, the system checks only the format of the IP address. The BFD session cannot be established if an incorrect peer IP address or source IP address is bound.

Example

# Create a static BFD session with automatically negotiated discriminators.

<Huawei> system-view
[Huawei] bfd
[Huawei-bfd] quit
[Huawei] bfd atob bind peer-ip 10.1.1.2 interface vlanif 100 source-ip 10.1.1.1 auto
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Updated: 2019-11-21

Document ID: EDOC1100064352

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