SWITCH A：
1.<HUAWEI>system-view
2.[HUAWEI]stack slot 0 priority 200
3.[HUAWEI]按"Yes"。 
4.[HUAWEI]quit 
5.<HUAWEI>save 
6.<HUAWEI>按"Yes"

SWITCH B: 
1.<HUAWEI>system-view 
2.[HUAWEI]stack slot 0 renumber 1 
3.按"Yes"。 
4.[HUAWEI]quit 
5.<HUAWEI>save 
6.<HUAWEI>按"Yes" 
堆叠线接法： 两条堆叠线以交叉方法接两台交换机的堆叠口，即A交换机的1口接B交换机的2口，A交换机的2口接B交换机的1口。 
当两台交换机的上述配置完成后，将所有交换机下电，再重启查看状态。

   

<HUAWEI>display device  //执行display device命令，查看堆叠系统中各成员交换机的个数与实际组网中交换机的个数是否一致。
S5720-56C-EI-AC's Device status:
Slot Sub  Type                Online    Power      Register     Status   Role
-------------------------------------------------------------------------------
0    -    S5720-56C-EI        Present   PowerOn    Registered   Normal   Master
     1    ES5D21VST000        Present   PowerOn    Registered   Normal   NA
     PWR1 POWER               Present   PowerOn    Registered   Normal   NA
     PWR2 POWER               Present   PowerOn    Registered   Normal   NA
     FAN1 FAN                 Present   PowerOn    Registered   Normal   NA
1    -    S5720-56C-EI        Present   PowerOn    Registered   Normal   Standby
     1    ES5D21VST000        Present   PowerOn    Registered   Normal   NA
     PWR1 POWER               Present   PowerOn    Registered   Normal   NA
     PWR2 POWER               Present   PowerOn    Registered   Normal   NA
     FAN1 FAN                 Present   PowerOn    Registered   Normal   NA

   

<HUAWEI>display stack   //执行display stack命令，查看堆叠系统的连接拓扑与实际硬件连接是否一致。
Stack topology type: Ring
Stack system MAC: 6008-1081-79c0
MAC switch delay time: 10 min
Stack reserved vlan: 4093
Slot of the active management port: --
Slot      Role        Mac address      Priority   Device type
-------------------------------------------------------------
0         Master      6008-1081-79c0   200        S5720-56C-EI-AC
1         Standby     6008-10cd-0ab0   100        S5720-56C-EI-AC