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For the rolling migration, we begin with the standby node decano1. Complete the following steps. 

Tip:  A demonstration of performing a rolling migration from PowerHA V7.1.3 to PowerHA V7.2.2 sp1 is shown in this YouTube video. 

1. Stop cluster services on node decano1. 

Run smitty clstop and select the options that are shown in Figure 4-2. The OK response appears quickly. Make sure that the cluster node is in the ST_INIT  state by reviewing the lssrc -ls clstrmgrES|grep state output. 

Alternatively, you can accomplish this task by using the clmgr  command: 

clmgr stop node=decano1 

<img src='content_image/1000430.jpg'>

2. Upgrade AIX. 

In our scenario, we have supported AIX levels for PowerHA V7.2.3 and do not need to perform this step, but if you do this step, then a restart is required before continuing. 

3. Verify that the clcomd  daemon is active, as shown in Figure 4-3. 

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