Concat; Contbus-A - Cisco ONS 15327 User Documentation

Chapter 14 Alarm Troubleshooting

14.4.26 CONCAT

•
The STS concatenation error (CONCAT) alarm occurs when the transmitted STSc circuit is smaller than
the provisioned STSc, which causes a mismatch of the circuit type on the concatenation facility. For
example, an STS3c or STS1 is sent across a circuit provisioned for STS12c.
Either an incorrect circuit size was provisioned on the reporting node, or the circuit source is delivering
the wrong circuit size. If a recently configured circuit reports this alarm, it is more likely that the
provisioned circuit size is incorrect. If a previously configured circuit has been operating correctly for a
period and then reports the alarm, it is more likely that a problem occurred with the circuit source.
Procedure: Clear the CONCAT Alarm
Check that the provisioned circuit size is correct:
Step 1
a.
b.
c.
Step 2 If the circuit size listed does not match the original network design plan, delete the circuit:
a.
b.
c.
Check that the size of the circuit source matches the correct circuit size:
Step 3
a.
b.

14.4.27 CONTBUS-A

•
The communication failure XTC A to shelf slot (CONTBUS-A) alarm means the XTC card in Slot 5 has
lost communication with a line card. Cards require frequent communication with the XTC card because
the XTC performs system initialization, provisioning, alarm reporting, maintenance, diagnostics, IP
address detection/resolution, SDCC termination, system fault detection, and other operations for the
ONS 15327. The XTC card also ensures that the system maintains Telcordia timing requirements.
The CONTBUS-A alarm can appear briefly when the ONS 15327 switches to the standby XTC card. In
this instance, the alarm clears after the cards establish communication with the new primary XTC card.
In cases where the alarm persists, the problem lies in the physical path of communication from the XTC
to the reporting card. The physical path of communication includes the XTC card, the card in Slot X and
the backplane.
June 2002
Critical, Service-Affecting
Click the Circuits tab.
Find the appropriate row using the circuit name and record the size listed in the size column.
Determine if the size listed matches the original network design plan.
Click the circuit row to highlight it and click Delete.
Click Yes at the Delete Circuits dialog box.
Recreate the circuit with the correct circuit size.
Measure the source signal with a test set to determine if the circuit size matches the provisioned
circuit.
If the source circuit signal is a test set, check that the test set settings match the intended circuit size.
Major, Non-Service-Affecting
Cisco ONS 15327 User Documentation, R3.3
Alarm Procedures
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