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.

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.

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.

How to disable MAC address learning on S series switches
For S series switches (except the S1700), you can use the following methods to disable MAC address learning: 1. Disable MAC address learning on an interface. [HUAWEI] interface gigabitethernet0/0/3 [HUAWEI-GigabitEthernet0/0/3] mac-address learning disable 2. Disable MAC address learning in a VLAN. [HUAWEI] vlan 2 [HUAWEI-vlan2] mac-address learning disable

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

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