PowerScale: How To Change Node LNN Number

Below is the procedure to change the Logical Node Number (LNN) number for a Node according to your workflow requirements.

Note: If the cluster is doing protocol auditing, do the steps below in order to avoid data unavailability. The cluster does not audit protocol traffic while auditing is disabled. Proceed with caution.

# isi audit settings global view
Protocol Auditing Enabled: Yes  <<<<<<<<<<<<<<<<
            Audited Zones: -
          CEE Server URIs: -
                 Hostname: 
  Config Auditing Enabled: No
    Config Syslog Enabled: No
    Config Syslog Servers: -
  Protocol Syslog Servers: -
     Auto Purging Enabled: No
         Retention Period: 180

 Step 2: Disable auditing before performing the LNN change:

Disable Audit: 
# isi audit settings global modify --protocol-auditing-enabled=no
# isi services -a isi_audit_d disable

Step 3: Run the command "isi config" then use "lnnset" command  :
(For example the LNN number is going from node 3 to 4)

# isi config      {Press enter}
>> lnnset 3 4                                  {Press enter}

Step 4: Node 3 has now changed to Node 4. Enter commit to commit the change:

>> commit                                      {Press enter} 
Commit succeeded.

 Check if the LNN number changed successfully by running "isi status" or "isi config" then "lnn"  :   

Step 5: Reenable isi_audit_d and protocol auditing if applicable:

Enable Audit:
# isi services -a isi_audit_d enable

ONLY re-enable if the cluster was doing protocol auditing from the first step:
# isi audit settings global modify --protocol-auditing-enabled=yes