NetWorker NVP vProxy: Backups fail to open DD Boost connection to the Data Domain host

The IP address of the target Data Domain System was changed.

The NetWorker VMware Protection (NVP) integration is configured with the vProxy Appliance. The virtual machine (VM) backups were working as expected and then started failing to open a ddboost connection to the Data Domain device. The NetWorker Server and vProxy Appliance can properly resolve (short name, Fully Qualified Domain Name (FQDN), and IP address) the Data Domain system. 

YYYY-MM-DDTHH:MM:SSZ ERROR: [@(#) Build number: ##] Failed to open DDBoost connection to DataDomain host "DATA_DOMAIN_FQDN": [5037] [ 2562] [140217763735296] Day Month Year HH:MM:SS

The vProxy daemon's cached the old Data Domain system IP address.

Restart the vProxy daemon's to clear old Data Domain IP address from cache.
 

1. Log in to the vProxy through an SSH client (PuTTy) and switch to the root account: 

2. Ensure the vProxy can ping the Data Domain's new IP address: 

3. Ensure the vProxy can resolve the Data Domain's new IP address and FQDN:

• If the vProxy cannot resolve the Data Domain or reach it using ping, resolve any name resolution or network connectivity issues; otherwise go to next step.
• Troubleshooting Domain Name System (DNS) and Name Resolution Issues

4. Reload the vProxy services:

Optionally you can reboot the vProxy host instead: 

reboot

5. Re-run the VM backup job.