Which statuses does an MSTP interface have, and how does the interface process packets

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Why does the interface of an OSPF process have different statuses simultaneously
If a tunnel interface and a loopback interface run OSPF and the tunnel interface borrows the address of the loopback interface, when the tunnel interface becomes Down but the loopback interface works normally, the problem occurs. You can run the display ospf interface all command to view the details. display ospf interface all OSPF Process 1 with Router ID 1.1.1.1 Interfaces Area: 0.0.0.0 (MPLS TE not enabled) Interface: 1.1.1.1 (LoopBack0) Cost: 1 State: DR Type: Broadcast MTU: 1500 Priority: 1 Designated Router: 1.1.1.1 Backup Designated Router: 0.0.0.0 Timers: Hello 10 , Dead 40 , Poll 120 , Retransmit 5 , Transmit Delay 1 Interface: 1.1.1.1 (Tunnel0/0/1) Cost: 1562 State: Down Type: P2P MTU: 1500 Unnumbered Timers: Hello 10 , Dead 40 , Poll 120 , Retransmit 5 , Transmit Delay 1

Which status do MSTP interfaces of an AR router have and how do they process packets
MSTP interface status: - Forwarding: In this state, an interface forwards user traffic. Only the root interface or a specified interface can be in this state. - Learning: This is a transitional state. In this state, a switch will build a MAC address table according to the user traffic it receives (but not forward the user traffic). That is why this state is referred to as a learning state. - Discarding: In this state, an interface blocks packets and does not learn MAC addresses.

Which status may a protected group of the OceanStor ReplicationDirector be in?
A protected group of the OceanStor ReplicationDirector (mainstream version: V100R003C10) may be in one of the following statuses: 1. Normal: indicates that the protected objects in the protected group are under protection. 2. Disabled: indicates that the protected group is disabled. 3. Invalid: indicates that the protected group is not under protection because its protected objects have been modified, for example, storage devices are changed or the synchronization between two ends fails. In addition, after a protected group switchover, the protected group changes to the invalid state. 4. Locked: indicates that a migration is being implemented for the protected group as specified in the recovery plan and no operation can be performed on the protected group. 5. Executing: indicates that the protected group execution has been automatically or manually triggered and data is being synchronized.

How does an interface enabled with VLAN mapping process a packet without a C-VLAN tag
If the VLAN ID of the packet is within the range of C-VLANs, the VLAN tag is replaced according to the configuration. If the VLAN ID of the packet is out of the range of C-VLAN IDs or the packet does not carry any tag, the packet is processed as follows: If qinq vlan-translation miss-drop is used, the packet is discarded directly. If the qinq vlan-translation miss-drop command is not used on the interface but the default VLAN ID is used, packets are tagged with the default VLAN ID before being forwarded. NOTE: When an interface configured with VLAN mapping received a packet with the C-VLAN ID out of the specified range, the interface transparently transmits the packet through the normal forwarding version if the interface is added to the VLAN of the packet.

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