Checking The Configurations - Huawei NetEngine80E Configuration Manual - Reliability

HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
Context
Perform the following procedure on the NE80E/40E that needs to be configured with the
association between BFD status and interface status:
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
bfd bfd-name
The BFD session view is displayed.
Step 3 Run:
process-interface-status
The status association between the current BFD session and the interface bound to the BFD
session is configured.
By default, the status of the current BFD session is not associated with the status of the interface.
That is, the change of the BFD session status does not affect the interface status.
Step 4 Run:
commit
----End

5.4.3 Checking the Configurations

By viewing the association between a BFD session status and the interface status, you can check
whether the configurations are successful.
Issue 02 (2014-09-30)
NOTE
l When the process-interface-status command and the commit command are run in succession, the
BFD session may not be set up or the BFD session does not go Up through negotiation. Therefore, the
BFD session does not notify the interface of the BFD status immediately, avoiding that the BFD session
notifies the interface of incorrect status information that results in incorrect interface status change.
After the configuration is committed, the BFD sessions can notify the interface of the BFD status
change. In this manner, the BFD session status is associated with the interface status.
l If the process-interface-status command is saved in the configuration file, the BFD session that is
bound to the interface notifies the interface that the BFD session is Down when the NE80E/40E is
restarted, in view of the initial status of an interface being Down.
l Before the BFD status is associated with the interface status, the BFD configurations on the two NE80E/
40Es must be correct and symmetrical. If the BFD status on the local interface is Down, check whether
the BFD configuration on the peer is correct or whether the BFD session is shut down.
l If the networking requires that the BFD status must be synchronized with the interface status, you can
run the shutdown and undo shutdown commands to change the status of the BFD session. When the
undo shutdown command is run, a timer to test the BFD session status is started. If the BFD session
goes Up through negotiation before the timer expires, the BFD session notifies the interface of the Up
state. Otherwise, the BFD session regards the link as failed and notifies the interface of the Down state
after the timer expires. In this manner, the BFD session status and the interface status are in real-time
synchronization.
l If the shutdown command is run,the BFD status will not be send to the interface.
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