S2300 Loopback-detect

I am having problems with the function of loopback-detect.it does not work in this case:

If an interface has been added to LS-S2309TP-EI-AC   VLANs in untagged mode, the interface sends one copy of untagged detection packet regardless of how many VLANs the interface has been added to. The untagged detection packets will be discarded on the link, so loopback detection cannot be performed on the network. In this situation, loopback detection must be configured in these VLANs.

If an interface has been added to VLANs in tagged mode, loopback detection must be enabled in specified VLANs, and the interface sends the loopback detection packets of the VLAN that contains the interface and has loopback detection enabled.

After VLAN IDs are specified, the interface sends one copy of untagged loopback detection packets and multiple copies of tagged loopback detection packets with the specified VLAN tags.

interface Ethernet0/0/10

 port link-type access

 port default vlan 100

 loopback-detect packet vlan 100

 loopback-detect enable

 undo ntdp enable

 undo ndp enable

 port-security enable

 port-security protect-action protect    

 port-security max-mac-num 5

 multicast-suppression 5

 broadcast-suppression 10

 traffic-pppoe any d0d0-fd50-7e90

interface GigabitEthernet0/0/2

 port link-type trunk

 undo port trunk allow-pass vlan 1

 port trunk allow-pass vlan 100 1083 to 1084

 loopback-detect packet vlan 100

 loopback-detect enable

#

right switch:

interface GigabitEthernet0/0/2

 port link-type trunk

 port trunk allow-pass vlan 100

 loopback-detect packet vlan 100

 loopback-detect enable

interface Ethernet0/0/1

 port link-type access

 port default vlan 100

 loopback-detect packet vlan 100

 loopback LS-S2318TP-EI-AC  -detect enable