Avamar: Accelerator node installation fails due to a DNS issue

During an Avamar Accelerator node installation, the workflow fails.

The workflow.log shows the following error: 

2018-01-12 01:50:16 (+0000) 4107124 INFO: Network address or DNS name of this Accelerator Node]
2018-01-12 01:50:16 (+0000) 4107124 INFO:
2018-01-12 01:50:16 (+0000) 4107124 INFO: Matched.
2018-01-12 01:50:16 (+0000) 4107124 INFO: Expected: [Network address or DNS name of the Avamar Server]
2018-01-12 01:50:16 (+0000) 4107124 INFO: Output: [ [xxx.xxx.com]:
2018-01-12 01:50:16 (+0000) 4107124 INFO: Network address or DNS name of the Avamar Server]
2018-01-12 01:50:46 (+0000) 4107124 ERROR: ERROR: Cannot expect 'Root password of Avamar Server', output ' [dpn99]: '
2018-01-12 01:50:46 (+0000) 4107124 DETAILS: ERROR: Cannot expect 'Root password of Avamar Server', output ' [dpn99]: '
2018-01-12 01:50:46 (+0000) 4107124 DETAILS: <RuntimeError>
2018-01-12 01:50:46 (+0000) 4107124 DETAILS:   /data01/avamar/repo/temp/AcceleratorInstallSles-7.4.1-58.avp_1515661292143

A Domain Name System (DNS) is unreachable on the Accelerator node, causing the workflow query of the Avamar FQDN to fail.

The following command can be run on the Accelerator node to confirm the issue:

ping -c 1 <Avamar FQDN>

Once confirmed, fix the DNS server issue. 

-- Or --

If the DNS issue cannot be fixed due to the customer's environment, use IP address for the Avamar server.