
Notes on Troubleshooting
7-4
Industrial Ethernet OSM/ESM Network Management
C79000-G8976-C137-08
Table 7-1 Troubleshooting
No. RemedyPossible CauseProblem
8 Fault Status signals
“non recoverable ring
error”
The RM is receiving test
frames on the OSM ring
from only one direction.
This is caused by defective
devices or cables in the
OSM ring.
Check whether cable and devices
function correctly. Problem indicators are
the traffic LEDs and the statistics counters
of the ring ports.
9 No E-mail,
BOOTP/DHCP, RMON,
or TELNET
connection.
Check/activate E-Mail, BOOTP/DHCP,
RMON or TELNET. RMON is not available
on the OSM TP22 and ESM TP40.
10 No reaction from
Web-Based
Management.
No IP connection Check the IP connection with the Ping
command.
(Entry in MS-DOS as ping <IP address>,
for example ping 142.11.7.8). The ping
check whether the OSM/ESM is
accessible from the PC.
Incorrect browser
connection
See Appendix A
SNMP disabled Run the snmp E command via the CLI.
11 Power supply failure Bad network configuration Make sure that there are no loops within
the network.
12 Password error Incorrect password. If you forget the password, you can
activate the default passwords again by
pressing the button on the front panel of
the OSM/ESM to start a reset.
13 TFTP process abort. The TFTP server
terminates the process due
to a timeout.
Increase the timeout time for the TFTP
server.
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