123 
# Configure GigabitEthernet 1/0/1 as a trunk port, assign it to VLANs 1 through 30, and enable 
flush message receiving on it. 
[DeviceD] interface gigabitethernet 1/0/1 
[DeviceD-GigabitEthernet1/0/1] port link-type trunk 
[DeviceD-GigabitEthernet1/0/1] port trunk permit vlan 1 to 30 
[DeviceD-GigabitEthernet1/0/1] smart-link flush enable 
[DeviceD-GigabitEthernet1/0/1] quit 
# Configure GigabitEthernet 1/0/2 as a trunk port, assign it to VLANs 1 through 30, disable the 
spanning tree feature, and enable flush message receiving on it. 
[DeviceD] interface gigabitethernet 1/0/2 
[DeviceD-GigabitEthernet1/0/2] port link-type trunk 
[DeviceD-GigabitEthernet1/0/2] port trunk permit vlan 1 to 30 
[DeviceD-GigabitEthernet1/0/2] undo stp enable 
[DeviceD-GigabitEthernet1/0/2] smart-link flush enable 
[DeviceD-GigabitEthernet1/0/2] quit 
# Create monitor link group 1, and then configure GigabitEthernet 1/0/1 as an uplink port and 
GigabitEthernet 1/0/2 as a downlink port for monitor link group 1. 
[DeviceD] 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 
5.  Verify the configuration: 
Use the display monitor-link group command to display the monitor link group information on 
devices. For example, when GigabitEthernet 1/0/2 on Device A goes down due to a link fault: 
# Display information about monitor link group 1 on Device B. 
[DeviceB] display monitor-link group 1 
 Monitor link group 1 information: 
 Group status: UP 
 Last-up-time: 16:37:20 2013/4/21 
 Last-down-time: 16:35:26 2013/4/21 
 Member                    Role     Status 
 ------------------------------------------ 
 GigabitEthernet1/0/1      UPLINK   UP 
 GigabitEthernet1/0/2      DOWNLINK UP 
# Display information about monitor link group 1 on Device D. 
[DeviceD] display monitor-link group 1 
 Monitor link group 1 information: 
 Group status: DOWN 
 Last-up-time: 16:35:27 2013/4/21 
 Last-down-time: 16:37:19 2013/4/21 
 Member                    Role     Status 
 ------------------------------------------ 
 GigabitEthernet1/0/1      UPLINK   DOWN 
 GigabitEthernet1/0/2      DOWNLINK DOWN