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