Why Is one MAC address learned in multiple VLANs on S series switch

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On S series switches (except S1700), MAC addresses are learned based on MAC addresses+VLANs. If multiple VLANs receive packets with the same MAC address, these VLANs will learn the same MAC address.

Other related questions:
Why cannot the switch learn an MAC address
The possible causes are: The mac-limit command is used on an interface and the VLAN that the interface belongs to and the number of dynamic MAC address entries learned by the interface reaches the limit. MAC address learning is disabled on the Ethernet interface and the VLAN that the interface belongs to by using the mac-address learning disable command. A blackhole MAC entry or static MAC entry is created or the sticky MAC function is enabled.

Can one IP address be bound to multiple MAC addresses in a binding table for IPSG on an S series switch
For S series switches, one IP address cannot be bound to multiple MAC address while one MAC address can be bound to multiple IP addresses. - If you need to bind discontinuous IP addresses to a MAC address, enter 1 to 10 IP addresses in the command. For example, bind IP addresses 10.1.1.2, 10.1.1.5, and 10.1.1.12 to MAC address 0001-0001-0001. [HUAWEI] user-bind static ip-address 10.1.1.2 10.1.1.5 10.1.1.12 mac-address 0001-0001-0001 - If you need to bind continuous IP addresses to a MAC address, enter 1 to 10 IP address segments in the command. The entered IP address segments cannot overlap. For example, bind IP address segments ranging from 10.2.1.1 to 10.2.1.10 and from 10.2.1.20 to 10.2.1.30 to MAC address 0002-0002-0002. [HUAWEI] user-bind static ip-address 10.2.1.1 to 10.2.1.10 10.2.1.20 to 10.2.1.30 mac-address 0002-0002-0002

Is MAC address of virtual machine learned by S series switch correct?
It is normal that S series switches (except S1700 switches) can learn MAC addresses of VMs. MAC address learning is the prerequisite for communication.

Can an interface on an S series switch learn the MAC address entries in a VLAN if the interface is not added to the VLAN
For S series switches (except the S1700), if an interface is not added to a VLAN, the interface does not learn the MAC address entries in the VLAN.

Why cannot a switch port learn MAC addresses
Failure of MAC address learning may be caused by configuration. If the switch port is in Up state, check whether the port, VLAN, and traffic policy is configured to allow MAC address learning and all VLANs, and check the status of the spanning tree.

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