拓扑图：
详细配置
SW1：
reboot
int range Ten-GigabitEthernet 1/0/50 to Ten-GigabitEthernet 1/0/51
shutdown
[H3C]irf-port 1/1
[H3C-irf-port1/1]port group interface Ten-GigabitEthernet 1/0/50
[H3C-irf-port1/1]irf-port 1/2
[H3C-irf-port1/2]port group interface Ten-GigabitEthernet 1/0/51
int range Ten-GigabitEthernet 1/0/50 to Ten-GigabitEthernet 1/0/51
undo shutdown
reboot
SW2：
irf member 1 renumber 2
reboot
int range Ten-GigabitEthernet 2/0/50 to Ten-GigabitEthernet 2/0/51
shutdown
[H3C]irf-port 2/1
[H3C-irf-port2/1]port group interface Ten-GigabitEthernet 2/0/51
[H3C-irf-port2/1]irf-port 2/2
[H3C-irf-port2/2]port group interface Ten-GigabitEthernet 2/0/52
int range Ten-GigabitEthernet 2/0/50 to Ten-GigabitEthernet 2/0/51
undo shutdown
reboot
SW3：
irf member 1 renumber 3
reboot
int range Ten-GigabitEthernet 3/0/50 to Ten-GigabitEthernet 3/0/51
shutdown
[H3C]irf-port 3/1
[H3C-irf-port3/1]port group interface Ten-GigabitEthernet 3/0/51
[H3C-irf-port3/1]irf-port 3/2
[H3C-irf-port3/2]port group interface Ten-GigabitEthernet 3/0/50
int range Ten-GigabitEthernet 3/0/50 to Ten-GigabitEthernet 3/0/51
undo shutdown
reboot