NetBackup cannot use the nbd or nbdssl transport mode to connect directly to VMware IPv6 ESXi servers
NetBackup cannot establish nbd or nbdssl connections directly to pure IPv6 ESXi servers. This limitation occurs only for ESXi credentials that have been configured in NetBackup.
This problem is a known VMware issue. For more details, refer to the Known Issues and Workarounds section of the Virtual Disk Development Kit 6.5 Release Notes, which are available on the following site:
Note:
This issue does not affect the hotadd and SAN transport modes. Also, this issue does not affect NetBackup connections that are established through IPv6 vCenters (with vCenter credentials).