NetWorker vProxy: Backups fail with VDDK Error: 30007: Failed to connect to host or proxy

Summary: VM backups failing with vProxy: Backups failing with Error: 30007: Failed to connect to host or proxy.

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Symptoms

The NetWorker VMware Protection integration is configured with the vProxy Appliance.  The virtual machine (VM) backups fail with a VMware Virtual Disk Development Kit (VDDK) error 30007 when attempting to access the Virtual Machine Disk (VMDK).  The backup workflow logs shows: 
...
YYYY-MM-DD HH:MM:SS WARN:   [74] Error enabling storage migration: VDDK Error: 30007: Failed to connect to host or proxy., retrying.
YYYY-MM-DD HH:MM:SS WARN:   [74] Error disabling storage migration: VDDK Error: 30007: Failed to connect to host or proxy.
YYYY-MM-DD HH:MM:SS ERROR:  [74] Failed to disable storage migration for virtual machine: VDDK Error: 30007: Failed to connect to host or proxy.
YYYY-MM-DD HH:MM:SS WARN:   [74] Error enabling storage migration for virtual machine "VMName".
...

The vProxy /opt/emc/vproxy/runtime/logs/vbackupd/vbackupd-vddk.log shows:

YYYY-MM-DD HH:MM:SS NOTICE: VDDK INFO YYYY-MM-DD HH:MM:SS warning -[12449] [Originator@6876 sub=Default] Failed to connect socket; <io_obj p:0x00007f3fa0016180, h:21, <TCP '##.##.##.## : 39650'>, <TCP '##.##.##.## : 443'>>, e: 113(No route to host)
YYYY-MM-DD HH:MM:SS NOTICE: VDDK INFO YYYY-MM-DD HH:MM:SS error -[22600] [Originator@6876 sub=Default] [FetchOverHttp] Error in sending request - No route to host

When testing connectivity using ProxyHC, noticed a different IP being used.

NVP-vProxy: How to use health check tool ProxyHC on vProxy appliance

Cause

The Domain Name System (DNS) services are resolving the vCenter name with two different IP addresses.   For example, the nslookup command-line utility from the vProxy shows: 
myvproxy:~ # nslookup myvcenter.mydomain.com
Server:         192.168.1.10
Address:        192.168.1.10#53

Name:   myvcenter.mydomain.com
Address: 192.168.1.51

Name:   myvcenter.mydomain.com
Address: 192.168.1.81

Resolution

Ensure the vCenter server name resolution is properly working in the environment.  If required, configure the NetWorker virtualization solution to resolve the vCenter server with a single IP address.

Affected Products

NetWorker

Products

NetWorker
Article Properties
Article Number: 000174300
Article Type: Solution
Last Modified: 16 Sept 2025
Version:  4
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