Checking The Configurations - Huawei NetEngine80E Configuration Manual - Reliability

HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
Step 2 Run:
bfd bfd-name
The BFD session view is displayed.
Step 3 Run:
process-interface-status sub-if
The association between the BFD status and the sub-interface status is configured.
Step 4 Run:
commit
The configuration is committed.
When the BFD session goes Down, the BFD statuses of the main interface bound to the BFD
session and its sub-interface also go Down.
----End

5.5.3 Checking the Configurations

By viewing the identifier of the association between the BFD session status and the sub-interface
status, you can check whether the configurations are successful.
Prerequisites
The configurations of the association between the BFD status and the sub-interface status
function are complete.
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 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.
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 BFD status is associated with interface status, the BFD configurations on the two NE80E/
40Es must be correct and symmetrical. If the BFD status on the local interface goes Down, check
whether the BFD configuration on the peer is correct or whether the BFD session has been shut down.
l If multiple sub-interfaces are deployed, BFD is associated with all of these sub-interfaces.
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