1.SSH连接到集群IP，查看FI的主备状态
FI-A# show cluster state
A: UP, PRIMARY
B: UP, SUBORDINATE
可以看到B为备。
2.从A登陆到B，然后重启
FI-A# connect local-mgmt B
FI-B(local-mgmt)# reboot
Before rebooting, please take a configuration backup.
Do you still want to reboot? (yes/no):yes
3.查看集群状态，确认HA是否启动，
FI-A(local-mgmt)# show cluster state
A: UP, PRIMARY
B: DOWN, INAPPLICABLE
HA NOT READY
Peer Fabric Interconnect is down
FI-B# show cluster state
B: UP, PRIMARY
A: UP, SUBORDINATE
HA READY
4.切换B为主,此时会断开连接，重新登陆集群，查看FI状态B为主，A为备
FI-A(local-mgmt)# cluster lead b
5.切换到A（备），重启
FI-B# connect local-mgmt a
FI-A(local-mgmt)# reboot
Before rebooting, please take a configuration backup.
Do you still want to reboot? (yes/no):yes
6.查看FI状态,切换A为主
FI-B# show cluster state
B: UP, PRIMARY
A: UP, SUBORDINATE
HA READY
FI-B# connect local-mgmt b
FI-B(local-mgmt)# cluster lead a
