3Com 6416SW manual Environment, Problems

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

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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