Cisco ONS 15454 SDH Specifications download pdf (Page 42)

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Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3

May 2002

Chapter 1 Alarm Troubleshooting

Alarm Procedures

Note When replacing a card with an identical type of card, you do not need to change the CTC

database.

Step 8 If a CARLOSS alarm repeatedly appears and clears, examine the layout of your particular network to

determine whether the Ethernet circuit is part of an Ethernet manual cross-connect. If the reporting

Ethernet circuit is part of an Ethernet manual cross-connect, then the reappearing alarm may be a result

of mismatched circuit sizes in the manual cross-connect setup. If the Ethernet circuit is not part of a

manual cross-connect, these steps do not apply.

Note An Ethernet manual cross-connect is used when third party equipment sits between

ONS 15454 SDHs, and the OSI/TARP-based equipment does not allow tunneling of the

ONS 15454 SDH TCP/IP-based Data Communications Channel (DCC). To circumvent a lack of

continuous DCC, the Ethernet circuit is manually cross-connected to a channel continuing

through the non-ONS network.

a. Right-click anywhere on the row of the CARLOSS alarm.

b. Click the Select Affected Circuits popup that appears.

c. Record the information in the type and size columns of the highlighted circuit.

d. From the examination of the layout of your particular network, determine the ONS 15454 SDH and

card that host the Ethernet circuit at the other end of the Ethernet manual cross-connect.

e. Log into the ONS 15454 SDH at the other end of the Ethernet manual cross-connect.

f. Double-click the Ethernet card that is part of the Ethernet manual cross-connect.

g. Click the Circuits tab.

h. Record the information in the type and size columns of the circuit that is part of the Ethernet manual

cross-connect. This circuit will connect the Ethernet card to an STM-N card on the same node.

i. Determine whether the two Ethernet circuits on each side of the Ethernet manual cross-connect have

the same circuit size from the circuit size information you recorded.

j. If one of the circuit sizes is incorrect, navigate to the incorrectly configured circuit.

k. Click the incorrectly configured circuit to highlight it and click Delete.

l. Click Yes at the Delete Circuit dialog box, and OK at the Confirmation dialog box.

m. Reconfigure the circuit with the correct circuit size. Refer to the

Cisco ONS 15454 SDH Installation and Operations Guide for procedures to provision Ethernet

manual cross-connects.

1.5.14 CARLOSS (EQPT)

• Minor, Non-service affecting

This carrier loss alarm means the ONS 15454 SDH and the workstation hosting CTC do not have a

TCP/IP connection. It is a problem involving the LAN or data circuit used by the RJ-45 connector on

the TCC-I card or the LAN backplane pin connection on the back of the ONS 15454 SDH. It does not

involve an Ethernet circuit connected to a port on Ethernet card. The problem is in the connection

(usually a LAN problem) and not the CTC or the ONS 15454 SDH.

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Cisco ONS 15454 SDH Specifications Page 42