Cisco 15310-MA Průvodce řešením problémů stáhnout pdf (Strana 193)

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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, Release 9.0

78-18394-01

Chapter 2 Alarm Troubleshooting

Alarm Procedures

Step 2 If the condition does not clear, log into the Technical Support Website at

http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447).

2.7.72 FAN

Default Severity: Critical (CR), Service-Affecting (SA)

SONET Logical Object: FAN

The Fan Failure alarm indicates a problem with the internal fan of the ONS 15310-CL or

ONS 15310-MA. When the fan is not fully functional, the temperature of the node can rise above its

normal operating range.

The Fan Failure alarm is also reported against the fan unit located inside the ONS 15310-CL or

ONS 15310-MA if only one power source is connected to the chassis, or if any fuse blows.

This alarm is not user-serviceable. If the alarm does not clear, log into the Technical Support Website at

http://www.cisco.com/techsupport for more information or call Cisco TAC to report a

Service-Affecting (SA) problem (1-800-553-2447).

2.7.73 FAN-DEGRADE

Default Severity: Major (MJ), Non-Service-Affecting (NSA)

SONET Logical Object: FAN

The Partial Fan Failure Speed Control Degradation alarm occurs if fan speed for one of the fans in the

ONS 15310-CL or ONS 15310-MA shelf falls under 500 RPM when read by a tachometry counter.

For an ONS 15310-CL, this alarm is not user-serviceable. For an ONS 15310-MA, refer to the fan tray

replacement procedure located in the Cisco ONS 15310-CL and Cisco ONS 15310-MA Procedure

Guide.

If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport

for more information or call Cisco TAC (1-800-553-2447).

2.7.74 FE-AIS

Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)

SONET Logical Object: DS3

The Far-End AIS condition occurs when an AIS has occurred at the far-end node. FE-AIS usually occurs

in conjunction with a downstream LOS alarm (see the “LOS (OCN)” alarm on page 2-106).

Generally, an AIS is a special SONET signal that tells the receiving node that the sending node has no

valid signal available to send. AIS is not considered an error. The AIS condition is raised by the receiving

node on each input when it detects the AIS instead of a real signal. In most cases when this condition is

raised, an upstream node is raising an alarm to indicate a signal failure; all nodes downstream from it

only raise some type of AIS. This condition clears when you resolve the problem on the upstream node.

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