Carloss (E-Series) - Cisco ONS 15327 User Documentation

Alarm Procedures
If nodes are not visible, ensure that SDCC terminations exist on each node:
Step 8
a.
b.
c.
d.
If alarms are raised when the DCCs are turned on, follow the
Step 9
procedure on page
If the alarm still does not clear, login to http://www.cisco.com/TAC for more information or call the
Step 10
Cisco Technical Assistance Center to report a service-affecting problem (1-800-553-2447).

14.4.23 CARLOSS (E-Series)

•
A carrier loss on the LAN is the data equivalent of a SONET LOS alarm. The Ethernet card has lost its
link and is not receiving a valid signal. The most common causes of this alarm are a disconnected cable
or an improperly installed Ethernet card. Ethernet card ports must be enabled (put in service) for
CARLOSS to occur. CARLOSS is declared after no signal is received for approximately 2.5 seconds.
This alarm also occurs after the restoration of a node database. In this instance, the alarm clears in
approximately 30 seconds after spanning-tree protection reestablishes. This applies to the E-series
Ethernet cards.
Always use the supplied ESD wristband when working with a powered ONS 15327. Plug the wristband
Caution
cable into the ESD jack located on the lower-right outside edge of the shelf assembly.
Procedure: Clear the CARLOSS Alarm
Verify that the Ethernet cable is properly connected and attached to the correct port.
Step 1
Verify that the Ethernet cable connects the card to another Ethernet device and is not misconnected to
Step 2
an OC-N card.
Check that the transmitting device is operational. If not, troubleshoot the device.
Step 3
Using a test set, determine that a valid signal is coming into the Ethernet port.
Step 4
If a valid Ethernet signal is not present and the transmitting device is operational, replace the Ethernet
Step 5
cable connecting the transmitting device to the Ethernet port.
If a valid Ethernet signal is present, physically reseat the Ethernet card.
Step 6
Step 7 If the alarm does not clear, replace the Ethernet card:
a.
b.
c.
d.
e.
Cisco ONS 15327 User Documentation, R3.3
14-20
Click the Provisioning > SONET DCC tabs.
Click Create.
Click the OC-N card that links to the adjacent node.
Click OK.
14-31.
Major, Service-Affecting
Open the card ejectors.
Slide the card out of the slot.
Open the ejectors on the replacement card.
Slide the replacement card into the slot along the guide rails.
Close the ejectors.
Chapter 14 Alarm Troubleshooting
"Clear the EOC Alarm on an OC-N Card"
June 2002