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Designating the range of ports for NDMP data connections

Data ONTAP supports a designated range of TCP/IP ports that can be used for NDMP data connections in response to NDMP_DATA_LISTEN and NDMP_MOVER_LISTEN operations.

About this task

Data ONTAP 8.0 7-Mode and earlier versions do not support data migration by using the ndmpcopy command and three-way tape backups in environments where the source and destination networks are separated by a firewall. This is because the data or mover port that is used in a data transfer is unpredictable.

Starting with Data ONTAP 8.0.1, administrators can designate range of ports that can be used for NDMP data connections in response to NDMP_DATA_LISTEN and NDMP_MOVER_LISTEN operations. Therefore, Data ONTAP enables you to perform data migration by using ndmpcopy command and 3-way tape backups even in environments where the source and destination networks are separated by a firewall.

Step

  1. To enable the data port range, enter the following command: options ndmpd.data_port_range {start_port-end_port}
    The ndmpd.data_port_range option allows administrators to specify a port range on which the NDMP server can listen for data connections.

    The start_port and end_port indicate the range of ports designated for data connection and can have values between 1024 and 65535; start_port must be less than or equal to end_port.

    If a valid range is specified, NDMP uses a port within that range to listen for incoming data connections. A listen request fails if no ports in the specified range are free.

    The default value for ndmpd.data_port_range option is all. The all implies that any available port can be used to listen for data connections.

    Note: The ndmpd.data_port_range option is persistent across reboots.

Example

Filer1> options ndmpd.data_port_range 1024-2048