Using the HP DTC 16RX Manager

How the backup works

Once conﬁgured, a backed up DTC Manager will operate as described below:

1 When the DTC is switched on, it sends out a request to the default DTC

Manager's IP address.

2 If after ten tries the default DTC Manager does not respond, the DTC waits for

30 seconds and then sends a request to the backup DTC Manager.

3 If after ten tries the backup DTC Manager does not respond, the DTC waits for

30 seconds and then sends its request again to the default DTC Manager. This

continues until one of the DTC Managers responds by downloading the

configuration files. The DTC is ready only after the download operation is

successful.

Backup types

The two backup types are:

• A full backup DTC Manager

• A backup DTC Manager for configuration download only.

For a full backup DTC Manager, you install DTC Manager on both the default host

and the backup host and conﬁgure the DTC on both hosts. This enables you to

conﬁgure and troubleshoot the DTC from either host. However, you must change

the conﬁguration on both hosts each time you modify a DTC’s conﬁguration.

For a backup DTC Manager for conﬁguration download, you only install DTC

Manager on the default host. After each conﬁguration change on the default host,

you copy the conﬁguration ﬁles to the backup host. This is the recommended

method and is described in detail in the following section.

Creating a backup DTC Manager for configuration download

Before you conﬁgure a backup manager, you must ensure that tftp is installed and

operational on your backup host. This is explained on page 17.

Each time you add a DTC or modify the conﬁguration of an existing DTC:

1 Use the rdtcstat command to verify the IP address of the DTC's backup host.

2 On the default manager, go to the directory <tftp_directory>/rdtcmgr.

3 Copy all the files to a directory of the same name in the backup host.