Can loopback detection be used together with VLAN-Mapping on interfaces of S series switch

When VLAN-Mapping is configured on interfaces of S series switches (except S1700), only loops in the translated VLAN can be detected, and loops in the original VLAN cannot be detected.
The reason is that: When a switch receives a packet, it will replace the VLAN ID carried in the packet with the translated VLAN. If the VLAN configured in loopback detection is the original VLAN, the switch finds that the VLAN where a loop is detected is not the original VLAN and will consider that no loop exists.

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