Configuration

Configuring the High Availability Feature

Configuring the High Availability Feature

The X.25 link software provides integration of the X.25/Streams solution to the High Availability HP MC/ServiceGuard feature on HP 9000 Series 800 Systems, allowing local and remote failure recovery.

This feature requires that the HP MC/ServiceGuard product (B3936AA) has been installed and that the X.25 software uses switches that support Hunt Group Facility allowing multiple DTEs to share a common X.121 address.

You should be familiar with the HP MC/ServiceGuard product prior to installation. For more information on Serviceguard, see Managing MC/ServiceGuard.

The High Availability features include:

•Local Failure: Support of local failure for an X.25 link is provided by a PDN using existing X.25 functionality. If a local X.25 PSI card fails, the calling DTE will see the link go down.

The Hunt Group facility results in all incoming calls being directed to the remaining “good” X.25 PSI card in the system.

•Remote Failure: HP MC/ServiceGuard, uses the x25ifstate command to monitor the X.25 status. If the monitor detects that the X.25 link it is monitoring has gone down, all it has to do is exit.

HP MC/ServiceGuard detects that the monitor service belonging to the package has disappeared, stops the package, and starts the migration towards a second system.

The X.121 address of the first package is taken over by the second system from the X.25 configuration file.

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Chapter 3