ATM Configuration and Troubleshooting Guide

Conﬁguring EMS High Availability over ATM

EMS High Availability Overview

Chapter 692

• EMS HA-ATM in conjunction with HP MC/ServiceGuard

manages the remote recovery and transfer of client applications from

one system to another if local recovery is not possible or not

conﬁgured. Recovery is provided for system failure, failure of all

adapters in a system, and failure of all the ATM switches or cables

connected to the adapters in the primary system.

The Event Monitoring Service (EMS) is involved in both local and remote

recovery. The EMS HA-ATM resource monitor (hatmmon) manages the

local recovery described above. If local recovery is not possible for some

reason, hatmmon notiﬁes EMS. EMS then notiﬁes MC/ServiceGuard, and

MC/ServiceGuard begins the remote recovery described above. EMS

must be installed on each system you want to be monitored by EMS

HA-ATM. Note that if the Event Monitoring Service (EMS) is not

already installed on a system, it is automatically installed when you

install the ATM software.

For an optimum High Availability solution, Hewlett-Packard

recommends that you conﬁgure remote recovery in conjunction with

local recovery.

NOTE EMS High Availability over ATM is available for LAN Emulation only; it

is not available for Classical IP (CIP).