Cisco ONS 15454 Troubleshooting Manual page 285

Chapter 2 Alarm Troubleshooting
Clear the E-W-MISMATCH Alarm with a Physical Switch
Diagram the ring setup, including nodes and spans, on a piece of paper or white board.
Step 1
In node view, click View > Go to Network View.
Step 2
Click the circuit and click Edit. The network map detailed view window appears. This window contains
Step 3
the node name, slot, and port for each end of each span.
Label each of the nodes on the diagram with the same name that appears on the network map.
Step 4
Label the span ends on the diagram with the same information. For example, with
Step 5
Node 1/Slot 12/Port 1—Node 2/Slot 6/Port 1 (2F BLSR OC48, ring name=0), label the end of the span
that connects Node 1 and Node 2 at the Node 1 end as Slot 12/Port 1. Label the Node 2 end of that same
span Slot 6/Port 1.
Repeat Steps
Step 6
Label the highest slot at each node east and the lowest slot at each node west.
Step 7
Examine the diagram. You should see a clockwise pattern of west slots connecting to east slots for each
Step 8
span. Refer to the "Install Cards and Fiber-Optic Cable" chapter in the Cisco ONS 15454 Procedure
Guide for more information about cabling the system.
If any span has an east-to-east or west-to-west connection, physically switching the fiber connectors
Step 9
from the card that does not fit the pattern to the card that continues the pattern should clear the alarm.
On the OC-192 card, the laser is on when the card is booted and the safety key is in the on position
Warning
(labeled 1). The port does not have to be in service for the laser to be on. The laser is off when the
safety key is off (labeled 0). Statement 293
Invisible laser radiation could be emitted from the end of the unterminated fiber cable or connector.
Warning
Do not stare into the beam directly with optical instruments. Viewing the laser output with certain
optical instruments (for example, eye loupes, magnifiers, and microscopes) within a distance of
100 mm could pose an eye hazard. Statement 1056
Use of controls, adjustments, or performing procedures other than those specified could result in
Warning
hazardous radiation exposure. Statement 1057
If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
Step 10
for more information or call Cisco TAC 1 800 553-2447 in order to report a Service-Affecting (SA)
problem.
Clear the E-W-MISMATCH Alarm in CTC
Log into the misconnected node. A misconnected node has both ring fibers connecting it to its neighbor
Step 1
nodes misconnected.
Step 2 Click the Maintenance > BLSR tabs.
November 2009
4 and 5 for each span on your diagram.
Cisco ONS 15454 Troubleshooting Guide, R8.5
2.7.96 E-W-MISMATCH
2-91