Cisco ONS 15310-CL Troubleshooting Manual page 141

Chapter 1 Alarm Troubleshooting
On the CE100T-8, provisioning a terminal (inward) loopback causes the transmit laser to turn off. If an
attached Ethernet device detects the loopback as a loss of carrier, the attached Ethernet device shuts off
the transmit laser to the CE100T-8 card. Terminating the transmit laser could raise the CARLOSS alarm
because the loopbacked CE100T-8 port detects the termination. For more information about CE100T-8
cards, refer to the Cisco ONS 15310-CL and Cisco ONS 15310-MA Ethernet Card Software Feature and
Configuration Guide.
If the port or card does not have a loopback condition, continue with
If a CARLOSS alarm repeatedly appears and clears, the reappearing alarm could be a result of
Step 12
mismatched STS circuit sizes in the setup of the manual cross-connect. Perform the following steps if
the Ethernet circuit is part of a manual cross-connect by completing the following steps:
Note
Right-click anywhere in the row of the CARLOSS alarm.
a.
Right-click or left-click Select Affected Circuits in the shortcut menu that appears.
b.
Record the information in the type and size columns of the highlighted circuit.
c.
Examine the layout of your network and determine which node and card are hosting the Ethernet
d.
circuit at the other end of the Ethernet manual cross-connect using the following substeps:
•
•
•
•
Determine whether the two Ethernet circuits on each side of the Ethernet manual cross-connect have
e.
the same circuit size from the circuit size information you recorded.
If one of the circuit sizes is incorrect, complete the
f.
reconfigure the circuit with the correct circuit size. Refer to the "Create Circuits" chapter in the
Cisco ONS 15310-CL and Cisco ONS 15310-MA Procedure Guide for detailed procedures to do
this.
Step 13 If a valid Ethernet signal is present, complete the
page 1-155.
If the alarm does not clear, complete the
Step 14
Ethernet card.
Note
78-17235-01
An Ethernet manual cross-connect is used when another vendor's equipment sits between
ONS nodes, and the Open System Interconnection/Target Identifier Address Resolution Protocol
(OSI/TARP)-based equipment does not allow tunneling of the TCP/IP-based DCC. To
circumvent a lack of continuous DCC, the Ethernet circuit is manually cross connected to an STS
channel riding through the non-ONS network.
Log into the node at the other end of the Ethernet manual cross-connect.
Double-click the Ethernet card that is part of the Ethernet manual cross-connect.
Click the Circuits tab.
Record the information in the type and size columns of the circuit that is part of the Ethernet
manual cross-connect. The cross-connect circuit connects the Ethernet port to an OC-N port at
the same node.
When you replace a card with the identical type of card, you do not need to make any changes
to the database.
Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
"Delete a Circuit" procedure on page 1-156
"Remove and Reinsert (Reseat) a Card" procedure on
"Physically Replace a Card" procedure on page 1-155
1.7.36 CARLOSS (CE100T)
Step 12.
and
for the
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