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Communication Problems in an IBM LAN Emulation Environment
This section details the problems that may occur during the setup of the IBM LAN
emulation environment. Such an environment may include concentrators (ONsemble
ATM Workgroup Concentrator) and bridges (4404B), the external IBM LAN Emulation
Server (LES), workstations (WS), ATM Workgroup Switches (4412SW), and the ONcore
hubs.
A workstation/bridge cannot connect to another workstation/bridge.
Steps to Take:
1. Using the LES monitor, check in the list of registered end stations that both
workstation/bridge addresses are present. If you do not know the ATM addresses of
your workstation bridge, use the ATMC Interface Configuration panel for the ports
attached to your workstation/bridge. If both addresses are registered in the LES,
then proceed to point 2).
If one workstation/bridge address is missing, then use the Call Status History
provided by the LES monitor to get the Q2931 cause of the failing call. The missing
station/bridge has probably a wrong LES ATM address defined in its configuration.
Check the missing station's configuration.
2. Both workstation/bridges are registered to the LES, but one cannot call the other
one, because the LES is not available any more (port disabled, or not-in-service).
The LES does not tell you that it has lost its address, because it only tells that once
the connection to the ONcore hub/CELLplex 4000 is returned.
Check that the LES cable is well plugged, then check that the LES port is enabled.
If it stays enabled and not-in-service, then the LES is faulty. Contact your 3Com
representative for investigation, or re-boot the LES.
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