You can use NDMP options to manage NDMP on your storage system.
The following table lists the NDMP options that you can use with the options command:
| Option | Description | Default value |
|---|---|---|
| ndmpd.access {all|legacy|host[!]=hosts|if [!]=interfaces} | Specifies the hosts or interfaces through which NDMP sessions are permitted or blocked | all |
| ndmpd.authtype {challenge|plaintext|plaintext,challenge} | Specifies whether a storage system accepts plaintext, challenge, or both to authenticate NDMP session requests | challenge |
| ndmpd.connectlog.enabled {on|off} | Enables or disables the monitoring of NDMP connections | off |
| ndmpd.enable {on|off} | Enables or disables NDMP service on your storage system | off |
| ndmpd.maxversion | Specifies the highest NDMP version Note: Starting with Data ONTAP 8.2, only NDMP version 4 is supported.
|
4 |
| ndmpd.ignore_ctime.enabled {on|off} | Enables or disables incremental backup of files that have their ctime changed since the previous backup | off |
| ndmpd.offset_map.enable {on|off} | Enables or disables offset map generation during backup | on |
| ndmpd.password_length {8|16} | Specifies the length of NDMP password | 16 |
| ndmpd.preferred_interface {interface|disable} | Specifies the preferred network interface to be used for NDMP data connections | disable |
| ndmpd.tcpnodelay.enable {on|off} | Optimizes the performance of the NDMP socket through which the storage system communicates with the DMA | off |
| ndmpd.tcpwinsize {tcp_window_size} | Specifies the TCP window size for data connection Note: The valid TCP window size range is 8192 – 7631441.
|
32768 |
| ndmpd.data_port_range {start_port-end_port|all} | Specifies a port range on which the NDMP server can listen for data connections Note:
|
all |
