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R1配置：
[S1]interface Ten-GigabitEthernet 1/0/49
[S1-Ten-GigabitEthernet1/0/49]sh 先斷電
[S1]irf-port 1/2
[S1-irf-port1/2]port group interface Ten-GigabitEthernet 1/0/49
[S1-irf-port1/2]quit
[S1]int Ten-GigabitEthernet 1/0/49
[S1-Ten-GigabitEthernet1/0/49]un sh
[S1-Ten-GigabitEthernet1/0/49]quit
[S1]save
[S1]irf-port-configuration active 激活IRF端口配置
[S1]interface Bridge-Aggregation 2
[S1-Bridge-Aggregation2]link-aggregation mode dynamic
[S1-Bridge-Aggregation2]mad enable 開啓MAD檢測
[S1-Bridge-Aggregation2]quit
[S1]int g1/0/1
[S1-GigabitEthernet1/0/1]port link-aggregation group 2
查看信息：
[S1]dis irf
MemberID Role Priority CPU-Mac Description
*+1 Master 1 7420-b83d-0100 ---
--------------------------------------------------
* indicates the device is the master.
+ indicates the device through which the user logs in.
The Bridge MAC of the IRF is: 7420-b83d-0100
Auto upgrade : yes
Mac persistent : 6 min
Domain ID : 0
R2配置：
[S2]irf member 1 renumber 2 修改成員編號爲2
注意：修改完成之後需要重啓纔有效
[S2]save 保存配置
<S2>reboot 重啓
[S2]dis irf
MemberID Role Priority CPU-Mac Description
*+2 Master 1 7420-bdd9-0200 ---
--------------------------------------------------
* indicates the device is the master.
+ indicates the device through which the user logs in.
The Bridge MAC of the IRF is: 7420-bdd9-0200
Auto upgrade : yes
Mac persistent : 6 min
Domain ID : 0
[S2]int Ten-GigabitEthernet 2/0/49 重啓之後接口的開頭編號會變爲修改的編號
[S2-Ten-GigabitEthernet2/0/49]sh 斷電
[S2]irf-port 2/1
[S2-irf-port2/1]port group interface Ten-GigabitEthernet 2/0/49
[S2-irf-port2/1]quit
[S2]int Ten-GigabitEthernet 2/0/49 通電
[S2-Ten-GigabitEthernet2/0/49]un sh
[S2-Ten-GigabitEthernet2/0/49]quit
[S2]irf-port-configuration active 激活IRF配置
注意：這兒會重啓，重啓完成之後設備名會變爲Master的名稱
[S1]dis irf
MemberID Role Priority CPU-Mac Description
*1 Master 1 7420-b83d-0100 ---
+2 Standby 1 7420-bdd9-0200 ---
--------------------------------------------------
* indicates the device is the master.
+ indicates the device through which the user logs in.
The Bridge MAC of the IRF is: 7420-b83d-0100
Auto upgrade : yes
Mac persistent : 6 min
Domain ID : 0
注意設備名稱
[S1]int GigabitEthernet 1/0/2 這兒不需要創建聚合端口，因爲R1和R2虛擬成一個設備，R1上創建了
[S1-GigabitEthernet1/0/2]port link-aggregation group 2
[S1-GigabitEthernet1/0/2]quit
R3配置：
[S3]interface Bridge-Aggregation 2
[S3-Bridge-Aggregation2]link-aggregation mode dynamic
[S3-Bridge-Aggregation2]quit
[S3]int g1/0/1
[S3-GigabitEthernet1/0/1]port link-aggregation group 2
[S3-GigabitEthernet1/0/1]quit
[S3]int g1/0/2
[S3-GigabitEthernet1/0/2]port link-aggregation group 2
[S3-GigabitEthernet1/0/2]quit
IRF域編號：
[S2]irf member 1 renumber 2 修改成員編號爲2
注意：修改完成之後需要重啓纔有效
[S2]save 保存配置
<S2>reboot 重啓
配置成員優先級：
[S1]irf member 1 priority 10
1.成員優先級是成員設備的一個屬性，主要用於角色選舉過程中確定成員設備的角色。優先級越高當選爲Master的可能性越大
2.設備的缺省優先級均爲1，如果想讓某臺設備當選爲Master，則在組建IRF前，可以通過命令行手工提高該設備的成員優先級
配置負載分擔：
全局配置：
[S1]irf-port global load-sharing mode destination-mac source-mac
接口配置：
[S1]irf-port 1/2
[S1-irf-port1/2]irf-port load-sharing mode source-ip destination-ip
啓動自動加載功能：
[S1]irf auto-update enable
配置BFD MAD檢測:
# 創建VLAN 3，並將SW2上的端口Gthernet1/0/1和SW3上的端口Gthernet1/0/1加入VLAN中。
<SW2> system-view
[SW2] vlan 3
[SW2-vlan3] port ethernet 1/0/1 ethernet 1/0/1
[SW2-vlan3] quit
# 創建VLAN接口3，並配置MAD IP地址。
[SW2] interface vlan-interface 3
[SW2-Vlan-interface3] mad bfd enable
[SW2-Vlan-interface3] mad ip address 192.168.2.1 24 member 1
[SW2-Vlan-interface3] mad ip address 192.168.2.2 24 member 2
[SW2-Vlan-interface3] quit
# 按圖1-14所示連接BFD MAD鏈路。
# 因爲BFD MAD和生成樹功能互斥，所以在Gthernet1/0/1和Gthernet1/0/1上關閉生成樹協議。
[SW2] interface ethernet 1/0/1
[SW2-Ethernet1/0/1] undo stp enable
[SW2-Ethernet1/0/1] quit
[SW2] interface ethernet 2/0/1
[SW2-Ethernet2/0/1] undo stp enable
配置ARP MAD:
# 在IRF上全局使能MSTP，以防止環路的發生。
<SW2> system-view
[SW2] stp enable
# 按圖1-15所示連接ARP MAD檢測鏈路。
# 將IRF配置爲MAC地址立即改變。
[SW2] undo irf mac-address persistent
# 創建VLAN 3，並將Device A（成員編號爲1）上的端口gthernet1/0/1和Device B（成員編號爲2）上的端口Ethernet2/0/1加入VLAN中。
{SW2] vlan 3
[SW2-vlan3] port ethernet 1/0/1 ethernet 2/0/1
[SW2-vlan3] quit
# 創建VLAN-interface3，並配置IP地址，使能ARP MAD檢測功能，由於並不是在兩個IRF之間配置ARP MAD檢測，因此在系統提示輸入IRF域ID時，可以保持爲默認值0。
[SW2] interface vlan-interface 3
[SW2-Vlan-interface3] ip address 192.168.2.1 24
[SW2-Vlan-interface3] mad arp enable
You need to assign a domain ID (range: 0-4294967295)
[Current domain is: 0]:
The assigned domain ID is: 0
(5)配置SW1
# 在全局使能MSTP，以防止環路的發生。
<SW1> system-view
[SW1] stp enable
# 創建VLAN 3，並將端口Gthernet1/0/1和Gthernet1/0/2加入VLAN 3中，用於轉發ARP MAD報文。
[SW1] vlan 3
[SW1-vlan3] port Gthernet 1/0/1 Gthernet 1/0/2
[SW1-vlan3] quit