Installation guide

How the RSN Software Works
6-2 Fault Tolerant System Administration (R1004H) HP-UX version 11.00.03
System (R1021H) for information on the Site Call System, the recommended
RSN interface.
■ remote access to your system by CAC personnel (dial-in)—A Continuum
system provides two special logins that the CAC can use to dial in to your
system to diagnose problems and perform data transfer functions. The logins,
sracs and sracsx, are subject to validation by the system administrator at
your site. You use the validate_hub command to validate an incoming call.
For information about how to receive and validate calls made to your system,
see the “Validating Incoming Calls” section later in this chapter.
How the RSN Software Works
Figure 6-1 shows the major RSN software components on your system and how
they interact with each other. The numbered callouts in Figure 6-1 are described as
follows:
1. rsnd polls the system regularly for the status of its hardware components.
2. If a fault or system event is detected, rsntrans automatically sends a call to
the HUB.
3. Calls are sent to the HUB over a dial-up telephone line.
4. You can use the mntreq command to send electronic mail messages, add calls,
and update existing calls to the HUB.
5. Calls and electronic mail messages are saved in files which are placed on the
RSN queue before being transferred to the HUB.
6. When a call is received at your supporting CAC, CAC will contact you
regarding the problem. The support personnel can dial into your system using
the cac login if further diagnosis is required.
7. Dial-in connections, which are received through the RSN port on your
system’s console controller, are monitored by rsngetty.
8. The RSN software is configured and administered primarily through the
rsnadmin program.
9. The rsndb file contains RSN configuration database information.