ATM Configuration and Troubleshooting Guide

Configuring EMS High Availability over ATM
Types of Failures Managed by EMS HA-ATM
Chapter 6 97
Types of Failures Managed by EMS HA-ATM
Figure 6-2 below shows examples of the possible failure points in an
ATM network. Note that this example uses HP-UX 10.20 naming
conventions.
Figure 6-2 Possible Failure Points in an ATM Network
The core ATM software and EMS HA-ATM provide local recovery for a
number of failures, as follows:
• The core ATM software:
• LAN Emulation Services (LECS, LES, and BUS) failure.
ATM
adapter 0
ATM
adapter 1
ela0 ela1 elb0 elb1
ATM
adapter 0
ela0 ela1
elb0 elb1
ATM network
ATM switches
LECS
LES
BUS
LECS
LES
BUS
Secondary system with
primary and secondary ATM
adapters and ELAN interfaces
Primary system with
primary and secondary
ATM adapters and ELAN
Primary LAN
Emulation Services
Secondary LAN
Emulation Services
ATM
adapter 1
interfaces
Local recovery
Remote recovery