Cisco Cisco IGX 8400 Modules Fehlerbehebungsanleitung
Error Example
The likely location of equipment errors is highlighted in yellow in this diagram:
P−bit Parity Errs
NTNetwork Termination
•
MUXThe Multiplexer in the Telco line path.
•
RxReceive
•
TxTransmit
•
Troubleshooting
The troubleshooting activities in this section are intrusive. Perform these steps in a maintenance window only
in these situations:
in these situations:
user traffic is affected
•
the dsptrks command output indicates that an error condition still persists, such as when the trunk is
not in
not in
Clear−OK
status
•
Both ends of the trunk must be active when you troubleshoot.
Issue the dsptrks command to verify that the trunk is active. If the trunk number is not displayed in
the dsptrks command output, then the trunk is not active. To activate a trunk, issue the uptrk
command.
the dsptrks command output, then the trunk is not active. To activate a trunk, issue the uptrk
command.
1.
Check cabling between the BTM and the next device upstream. Typically, the next device upstream is
the local Network Termination (NT).
the local Network Termination (NT).
Leave the local cabling connected to the BTM interface card, but remove it from the NT.
a.
With the appropriate BNC connector, connect the transmit (Tx) connector to the receive (Rx)
connector of the open cable, to loop it back to the local BTM interface card. Alternatively,
place the local NT into the metallic loop toward the local trunk module of the Customer
Premises Equipment (CPE). In this example, the CPE is the Cisco IGX BTM interface card.
connector of the open cable, to loop it back to the local BTM interface card. Alternatively,
place the local NT into the metallic loop toward the local trunk module of the Customer
Premises Equipment (CPE). In this example, the CPE is the Cisco IGX BTM interface card.
b.
If the trunk status in the dsptrks command output changes to
Clear−OK
and the dsptrkerrs
command no longer shows incremental errors, then the cable and the local trunk module are
working properly.
working properly.
Monitor the output of the dsptrkerrs command for a few minutes before you proceed
to Step 3.
to Step 3.
◊
If the trunk status does not change to
Clear−OK
or if the dsptrkerrs command
continues to show incremental errors, then repeat Step 2.
◊
c.
2.
Place a loopback cable onto the connectors at the interface card of the BTM, to check the local
hardware. If the trunk status in the output of the dsptrks command changes to
hardware. If the trunk status in the output of the dsptrks command changes to
Clear−OK
and the
dsptrkerrs command output no longer shows incremental errors, then the BTM and interface card are
working properly.
working properly.
3.