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Cisco IE 2000 Switch Software Configuration Guide
OL-25866-01
Chapter 3 Configuring Switch Alarms
Information About Switch Alarms
Global Status Monitoring Alarms
The switch processes alarms related to temperature and power supply conditions, referred to as global
or facility alarms.
FCS Error Hysteresis Threshold
The Ethernet standard calls for a maximum bit-error rate o f 10-8. The bit error-rate range is from 10-6 to
10-11. The bit error-rate input to the switch is a positive exponent. If you want to configure the bit
error-rate of 10-9, enter the value 9 for the exponent. By default, the FCS bit error-rate is 10-8.
You can set the FCS error hysteresis threshold to prevent the toggle of the alarm when the actual bit-error
rate fluctuates near the configured rate. The hysteresis threshold is defined as the ratio between the alarm
clear threshold to the alarm set threshold, expressed as a p ercentage value.
For example, if the FCS bit error-rate alarm value is configured to 10–8, that value is the alarm set
threshold. To set the alarm clear threshold at 5*10-10, the hysteresis, value h, is determined as follows:
h = alarm clear threshold / alarm set threshold
h = 5*10-10 / 10-8 = 5*10-2 = 0.05 = 5 percent
The FCS hysteresis threshold is applied to all ports on the switch. The allowable range is from 1 to 10
percent. The default value is 10 percent. See the “Configuring the FCS Bit Error Rate Alarm” section on
page 3-7 for more information.
Port Status Monitoring Alarms
The switch can also monitor the status of the Ethernet po rts and generate alarm messages based on the
alarms listed in Table 3-2. To save user time and effort, it supports changeable alarm configurations by
using alarm profiles. You can create a number of profiles and assign one of these profiles to each Ethernet
port.
Tab l e 3-1 Global Status Monitoring Alarms
Alarm Description
Power supply alarm By default, the switch monitors a single power supply. If you configure a dual power supply, an
alarm triggers if one power supply fails. You can configure the power supply alarm to be connected
to the hardware relays. For more information, see the “Configuring the Power Supply Alarms”
section on page 3-6.
Temperature alarms The switch contains one temperature sensor with a primary and secondary temperature setting. The
sensor monitors the environmental conditions inside the switch.
The primary and secondary temperature alarms can be set as follows:
• The primary alarm is enabled automatically to trigger both at a low temperature, –4°F (–20°C)
and a high temperature, 203°F (95°C). It cannot be disabled. By default, the primary
temperature alarm is associated with the major relay.
• The secondary alarm triggers when the system temperature is higher or lower than the
configured high and low temperature thresholds. The secondary alarm is disabled by default.
For more information, see the “Configuring the Switch Temperature Alarms” section on page 3-6.
SD-Card By default the alarm is disabled.