Transport modes options (VMware)
The transport modes determine how the snapshot data travels from the VMware datastore to the VMware backup host. The appropriate mode depends in part on the type of network that connects the VMware datastore to the VMware backup host.
By default, all modes are selected. NetBackup tries each transport mode in order, from top to bottom. It uses the first mode that succeeds for all disks in the virtual machine.
Table: Transport Modes
Mode | Description |
|---|
SAN | For unencrypted transfer over Fibre Channel (SAN) or iSCSI. This mode is not supported for the virtual machines that use VMware Virtual Volumes (VVols). |
HotAdd | Lets you run the VMware backup host in a virtual machine. For the virtual machines that use VVols, the virtual machine and the backup host (hotadd) virtual machine must reside on the same VVol datastore. For instructions on this transport mode and on installing the backup host in a VMware virtual machine, refer to your VMware documentation. |
NBD | For unencrypted transfer over a local network that uses the Network Block Device (NBD) driver protocol. This mode of transfer is usually slower than Fibre Channel. |
NBDSSL | For encrypted transfer (SSL) over a local network that uses the Network Block Device (NBD) driver protocol. This mode of transfer is usually slower than Fibre Channel. |
Actions > Move up Actions > Move down | Use these options to change the order in which NetBackup tries each selected mode. For example: assume that all four transport modes are selected, and the order is SAN, HotAdd, NBD, and NBDSSL. If one of the virtual disks cannot be accessed using SAN, the SAN transport mode is not used for any of the virtual machine's disks. NetBackup then tries to use the HotAdd mode for all the disks. NetBackup continues to try each mode until it finds one that succeeds for all the disks. |
