ATM Configuration and Troubleshooting Guide

Troubleshooting
Troubleshooting Secondary LAN Emulation Services
Chapter 9 249
NOTE If you configured a secondary LES/BUS pair only—that is, only one
LECS and two LES/BUS pairs—the primary LECS must be the same as
the secondary LECS ATM address.
Although the ATM software allows you to configure only one LECS, this
is not recommended, because a failure of the LECS will prevent
operation of the part of your ATM network that relies on the LECS.
E Check that the secondary LES/BUS ATM addresses are different from
the primary LES/BUS ATM addresses.
If they are the same, this means that the primary and secondary ELANs
are the same. This is wrong, because if the primary ELAN has failed, you
do not want the LEC to try to switch over to using an already failed
secondary ELAN.