拓扑图如下
(1)配置Device A
设置Device A的成员编号为1，创建IRF端口2，并将它与物理端口Ten-GigabitEthernet3/0/1绑定。
system-view
[Sysname] irf member 1
[Sysname] irf-port 2
[Sysname-irf-port2] port group interface ten-gigabitethernet 3/0/1
[Sysname-irf-port2] quit
[Sysname] interface ten-gigabitethernet 3/0/1
[Sysname-Ten-GigabitEthernet3/0/1] undo shutdown
[Sysname-Ten-GigabitEthernet3/0/1] quit
[Sysname] quit
save
system-view
[Sysname] chassis convert mode irf
设备重启后Device A组成了只有一台成员设备的IRF。
(2) 配置Device B
配置Device B的成员编号为2，创建IRF端口1，并将它与物理端口Ten-GigabitEthernet3/0/1绑定。
system-view
[Sysname] irf member 2
[Sysname] irf-port 1
[Sysname-irf-port1] port group interface ten-gigabitethernet 3/0/1
[Sysname-irf-port1] quit
[Sysname] interface ten-gigabitethernet 3/0/1
[Sysname-Ten-GigabitEthernet3/0/1] undo shutdown
[Sysname-Ten-GigabitEthernet3/0/1] quit
[Sysname] quit
save
system-view
[Sysname] chassis convert mode irf
设备B重启后与设备A形成IRF。
(3) 配置BFD MAD检测
创建VLAN 3，并将Device A（成员编号为1）上的端口1/4/0/1和Device B（成员编号为2）上的端口2/4/0/1加入VLAN中。
system-view
[Sysname] vlan 3
[Sysname-vlan3] port gigabitethernet 1/4/0/1 gigabitethernet 2/4/0/1
[Sysname-vlan3] quit
创建VLAN接口3，并配置MAD IP地址。
[Sysname] interface vlan-interface 3
[Sysname-Vlan-interface3] mad bfd enable
[Sysname-Vlan-interface3] mad ip address 192.168.2.1 24 member 1
[Sysname-Vlan-interface3] mad ip address 192.168.2.2 24 member 2
[Sysname-Vlan-interface3] quit
因为BFD MAD和生成树功能互斥，所以在GigabitEthernet1/4/0/1和GigabitEthernet2/4/0/1上关闭生成树协议。
[Sysname] interface gigabitethernet 1/4/0/1
[Sysname-gigabitethernet-1/4/0/1] undo stp enable
[Sysname-gigabitethernet-1/4/0/1] quit
[Sysname] interface gigabitethernet 2/4/0/1
[Sysname-gigabitethernet-2/4/0/1] undo stp enable
配置完成
另外针对于不同的检测方式。对比如下图。
