IBM 8285 Nways, Installation And User Manual

Page: 186 / 265

Problems with Configuring Expansion Unit Modules
If the cause of a Phase 2 problem is not due to the workgroup switch console connection, and if your
workgroup switch includes the Expansion Unit feature, make sure that all Expansion Unit modules are
operational by following the troubleshooting procedures listed below.
Possible problem with Expansion Unit module
Steps to Take:
1. Enter the SHOW MODULE ALL command as described in the IBM 8285/8260: ATM Command Reference Guide,
SA33-0385.
2. Check that each module is installed, connected, and functioning properly. Normal operation is indicated when Y
appears in the Install , Connect , and Operation columns for all slot numbers except the row where
<
extension
>
appears. In the row for this slot, normal operation is indicated by Y in the Install column and N in the Connect
and Operation columns.
3. If N appears for Install , make sure that the module is properly plugged into the backplane connectors in the hub.
If N appears for Connect , use the SET MODULE command to reconnect the module for ATM traffic.
If N appears for
Operation
, the module, slot, or backplane may be faulty. Insert the module into other slots to see
if the slot or backplane is the cause.
If the problem persists, enter the SHOW MODULE VERBOSE command to display more detailed information on
the module's status.
4. If the status of the module in the SHOW MODULE VERBOSE screen is hardware KO and permanent failure ,
reset the module. If the problem persists and if the module's status does not change to HARDWARE OKAY and
NORMAL , replace the module.
If the module's status continues as under recovery for a long time, reset the module. If the problem persists,
replace the module.
158
IBM 8285 Nways ATM Workgroup Switch: Installation and User’s Guide