HP J2600A Installation Manual page 67

Troubleshooting
Interpreting LED Error Patterns
Table 4-2. LED Error Patterns During Router Operation
LEDs on Router Module's Cover Plate
Router Router Hub
Self-Test Fault (LAN) Net Fail
Net Fail
OFF ON *
OFF ON *
OFF ON OFF
OFF OFF OFF
OFF OFF ON
*This LED is not important for the diagnosis.
WAN SNMP
Mgt
Fault
OFF OFF A router software failure was detected. When this error occurs, this
pattern of LEDs appears for only a few seconds until the router
reboots (which will occur unless Auto Reboot in the configuration
has been disabled). If Auto Reboot has been disabled, reset the
router module to reboot it.
After the router reboots, information about the failure will appear in
the crash history (which can be displayed using the NCL Crash
command) and in the event log (which can be displayed from the
Main menu).
* ON Replace the SNMP module.
ON OFF Port failure detected.
1. Verify that the node at the other end is up and running.
2. If this error persists, make sure the WAN is specified correctly in
the configuration. (Refer to "Create or Modify a Router
Configuration", page 2-5.)
3. If the error still persists, check for a fault in the network equipment
or links.
4. If the error still persists, replace the WAN cable.
5. If the error still persists, replace the router module.
ON OFF Either a device has not yet been connected, or the connection to the
remote device has been lost. The broken connection can be
detected if the Remote signal & sense parameter is enabled in the
configuration or if a protocol is running on this port. The circuit will
be enabled again when the connection is restored.
For point-to-point non-X.25 circuits, if Remote signal & sense is
enabled, then the WAN port is not hearing properly addressed
Breath-of-Life packets from the remote device. This may be due to
faulty or disconnected network hardware or improper configuration.
OFF OFF The router module's LAN driver is unable to send data. (Data is sent
by a protocol or when XCVR Signal Polling is enabled on the internal
LAN port.) The failure may be due to faulty or disconnected network
hardware, excessive collisions, or excessive deferrals. Call for
service from your HP dealer or service provider.
Diagnostic Tips
4-5