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Fat AP and Cloud AP V200R010C00 Command Reference

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The process-interface-status command associates the BFD session status with the bound interface status.

The undo process-interface-status command restores the default setting.

By default, the BFD session status is not associated with the interface status. That is, the change of the BFD session status does not affect the interface status.


process-interface-status [ sub-if ] [ reboot-no-impact ]

undo process-interface-status [ sub-if ] [ reboot-no-impact ]


Parameter Description Value

Enabled the association between the status of the BFD session and the status of the bound sub-interface. The status change of a BFD session that is bound to a primary interface affects the status of the primary interface and sub-interface in IFNET.


Disables the association between a multicast BFD session and interface during device startup.



BFD session view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

If a transmission device exists on a direct link, BFD detects a link fault faster than a link protocol on an interface. The link protocol status of a trunk or VLANIF interface depends on the link protocol status of member interfaces.

To help BFD rapidly report the detection result to the application, a BFD status attribute is added to the interface management module of each interface. This attribute indicates the status of the BFD session that is bound to the interface. The system obtains the interface status based on the link status, protocol status, and BFD status on the interface, and then reports the interface status to the application.


When configuring the process-interface-status command, pay attention to the following points:
  • The process-interface-status command takes effect for only the single-hop BFD session that uses the default multicast address. The BFD session can be associated to an interface status.

  • If multiple BFD sessions are bound to an interface, you can use the process-interface-status command for only one BFD session. The change of only one BFD session changes the status of the bound interface.

  • The BFD session does not report the BFD status to the bound interface immediately after the commit command is executed because the BFD session may not be set up or not Up. This prevents the BFD session from reporting an incorrect state to the interface. When the BFD status changes, the BFD session reports the BFD status to the interface to trigger the interface status change.

  • If the process-interface-status command is saved in the configuration file, the BFD session for which the process-interface-status command is run notifies an interface that the BFD session becomes Down when the device is restarted. This is because the initial status of the interface is Down.

  • Before the BFD session status is associated with the interface status, the BFD configurations on two ends must be correct and matched. If the BFD session status on the local interface is Down, check whether the BFD configuration on the peer end is correct or whether the BFD session is shut down.

  • If the BFD session must be synchronized to an interface immediately, ensure that the BFD configurations on the two ends are the same and run the shutdown (BFD session view) and undo shutdown (BFD session view) commands on the BFD session. When the undo shutdown (BFD session view) command is executed for a BFD session, a BFD session detection timer is started. If the BFD session becomes Up through negotiation before the timer times out, the BFD session notifies an interface of the Up state. Otherwise, the BFD session considers the link faulty and notifies the interface of the Down state. The status of a BFD session and the status of an interface can be synchronized in real time.

  • If reboot-no-impact is specified, a multicast BFD session is not associated with an interface during device startup.


# Associate the BFD session with an interface to which the BFD session is bound.

<Huawei> system-view
[Huawei] bfd test
[Huawei-bfd-session-test] undo process-interface-status
Updated: 2019-11-21

Document ID: EDOC1100064352

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