2-4 
[DeviceC-GigabitEthernet1/0/2] quit 
# Create smart link group 1 and configure the smart link group to protect all the VLANs mapped to 
MSTIs 0 through 15 for smart link group 1. 
[DeviceC] smart-link group 1 
[DeviceC-smlk-group1] protected-vlan reference-instance 0 to 15 
# Configure GigabitEthernet 1/0/1 as the master port and GigabitEthernet 1/0/2 as the slave port for 
smart link group 1.   
[DeviceC-smlk-group1] port gigabitethernet 1/0/1 master 
[DeviceC-smlk-group1] port gigabitethernet 1/0/2 slave 
# Enable the smart link group to transmit flush messages in VLAN 1.   
[DeviceC-smlk-group1] flush enable 
2)  Configuration on Device A 
#    Enable flush message receiving on GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 separately.   
<DeviceA> system-view 
[DeviceA] interface gigabitethernet 1/0/1 
[DeviceA-GigabitEthernet1/0/1] smart-link flush enable 
[DeviceA-GigabitEthernet1/0/1] quit 
[DeviceA] interface gigabitethernet 1/0/2 
[DeviceA-GigabitEthernet1/0/2] smart-link flush enable 
3)  Configuration on Device B 
# Create monitor link group 1.   
<DeviceB> system-view 
[DeviceB] monitor-link group 1 
# Configure GigabitEthernet 1/0/1 as an uplink port and GigabitEthernet 1/0/2 as a downlink port for 
monitor link group 1.   
[DeviceB-mtlk-group1] port gigabitethernet 1/0/1 uplink 
[DeviceB-mtlk-group1] port gigabitethernet 1/0/2 downlink 
[DeviceB-mtlk-group-1] quit 
#    Enable flush message receiving on GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 separately.   
[DeviceB] interface gigabitethernet 1/0/1 
[DeviceB-GigabitEthernet1/0/1] smart-link flush enable 
[DeviceB-GigabitEthernet1/0/1] quit 
[DeviceB] interface gigabitethernet 1/0/2 
[DeviceB-GigabitEthernet1/0/2] smart-link flush enable 
4)  Configuration on Device D 
# Create monitor link group 1.   
<DeviceD> system-view 
[DeviceD] monitor-link group 1 
# Configure GigabitEthernet 1/0/1 as the uplink port and GigabitEthernet 1/0/2 as the downlink port for 
monitor link group 1.   
[DeviceD-mtlk-group1] port gigabitethernet 1/0/1 uplink 
[DeviceD-mtlk-group1] port gigabitethernet 1/0/2 downlink 
[DeviceD-mtlk-group1] quit