IBM ATM OC-3c - Manual (Page 105)

Identifying the Problem D-11
Why has the LEC Operation Failed?
There are two fields on the ATM VLAN LEC Status
screen, described in step 9, that can be used to
troubleshoot LEC failure problems. The LEC Operation
at Failure field identifies the operation that was taking
place when the LEC failed to successfully join the
Emulated LAN Services. The Last LEC Failure Reason
field identifies the probable cause of the problem.
Use Table D-3, in conjunction with Table D-4 on page
D-12 to try and resolve the problem.
Table D-3 LEC Operation at Failure
Operation Description
None There are no known operation failures.
Calling LECS The LEC is trying to connect to the
LECS to receive LANE configuration
information.
Reading
Configuration
from LECS The LEC receives configuration
information from the LECS in
preparation for joining the LES.
Joining LES The LEC is trying to join the ELAN by
registering itself with the LES that
controls that ELAN.
When the LEC has joined the LES, it is
given a unique LAN Emulation Client
Identifier (LECID), knows the Emulated
LAN’s maximum frame size, and knows
its LAN type (either Ethernet or Token
Ring).
Initial Registration After joining, a LEC can register any
number of MAC addresses and/or
Route Descriptors (for Token Ring
implementations).
Connecting to BUS In order to establish a connection to
the Broadcast and Unknown Server
(BUS) the LEC requires the broadcast
address. It requests the broadcast
address from the LES.
Operational The LEC is now part of the ELAN.