ATM Configuration and Troubleshooting Guide

Troubleshooting
Troubleshooting EMS HA over ATM
Chapter 9276
C Checking a current ELAN interface failure. If the message
Current ELAN interface is DOWN is present in the log file for one or
more ELAN interfaces, but the message Current ATM adapter is DOWN
is not present, this means that the current ATM adapter is operational
but the current ELAN interface has failed. ELAN interface failure occurs
when contact is lost with the primary and secondary LAN Emulation
Services (LECS, LES, and BUS). If this happens, the hatmmon daemon
notifies EMS that the ELAN interface resource is down (and
MC/ServiceGuard starts remote recovery). The hatmmon daemon does
not stop, but keeps monitoring the ELAN interface. When the interface
problem is fixed, and the ELAN interface becomes active again, hatmmon
detects it and notifies EMS that the ELAN interface is up. Check the
ELAN interface log file for messages about these events. For example,
these messages might be logged:
Current ELAN interface is DOWN 305
Local recovery made 307
or
Current ELAN interface is DOWN 305
Local recovery not possible 307
For any ELAN interface that has failed, troubleshoot the primary and
secondary LAN Emulation Services for the failed ELAN interface, as
described in “Troubleshooting LAN Emulation” on page 226 and
“Troubleshooting Secondary LAN Emulation Services” on page 245.
If the Recovery Delay Period is Configured
If you configured a local recovery delay period for a primary ELAN
interface (see “Local Recovery” on page 93), and the interface failed
earlier but later comes back up during the delay period, the message The
Current ELAN interface or ATM adapter has recovered from a
failure is written to the log file.
Example for HP-UX 10.20:
------------------------ EVENT #4 -----------------------
20:09:1998:22:49:19:986 320 : The Current ELAN interface or ATM adapter
has recovered from a failure.
ELAN interface: ela0 is UP.
ATM adapter: atm0 is UP.