After the shutdown and undo shutdown commands are used on a trunk member interface of an S6700, traffic is interrupted. Why

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When the shutdown and undo shutdown commands are used on a trunk member interface of an S6700, the trunk bandwidth changes. The ifnet sends a port rate change event. MSTP responds to the event and delivers the Block flag to the outbound port. As a result, the outbound port cannot forward traffic. After 15s, MSTP delivers the forward flag to the port. Traffic can be forwarded. When the shutdown and undo shutdown commands are used on a trunk member interface of an S6700, traffic is interrupted for 15s.

Other related questions:
Problem and solution when the USG2000 and USG5000 series can properly work only after the undo shutdown command is executed on the interface
The interface has been manually disabled.

Does the SC have a shutdown command?
The SC does not have a shutdown command, but has a restart command. Restarting the SC: reboot (Only the SC service is restarted.) Restarting the host: reboot-host (The server where the SC service is deployed is restarted.)

Automatic radio shutdown
Automatic radio signal shutdown [HUAWEI] wlan Enable automatic radio signal shutdown by radio (2.4 GHz/5 GHz): [HUAWEI-wlan-view] auto-off service radio ap-id 0 radio-id 0 start-time 1:00:00 end-time 7:00:00 Enable automatic radio signal shutdown by SSID: [HUAWEI-wlan-view] auto-off service ess service-set id 0 start-time 01:00:00 end-time 07:00:00

After the shutdown command is executed on an interface of an S series switch, an LSA sent by the switch still exists in the peer LSDB. Why
Question: Two devices are connected using a link. After the shutdown command is executed on an interface on one end of the link, an LSA sent by the interface still exists in the peer LSDB. Why? Answer: An LSA can be flooded only by the S series switch supporting OSPF that generates the LSA. When the peer switch has no reachable path to the local switch, new LSAs generated by the local switch will not be flooded to the peer. Therefore, the old LSA exists in the peer LSDB. It is not used in SPF calculation and ages with time.

For S series switches, why is the BGP connection not immediately closed after the shutdown command is executed on the interfaces connecting two peers
Q: Why is the BGP connection not cut off immediately after the shutdown command is executed on interfaces connecting two devices? A: When the EBGP peers are directly connected and the ebgp-interface-sensitive command is executed in the BGP view, the BGP peer connection is interrupted immediately after the interfaces connecting the two peers are shut down. By default, the ebgp-interface-sensitive command is executed in the BGP view. In other cases, the BGP peer relationship is not interrupted until the Hold timer times out.

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