Specifications

5-2
System Management Software Configuration Guide for Cisco IE 2000U and Connected Grid Switches
Chapter 5 Configuring the Switch Alarms
Information About Switch Alarms
• Global Status Monitoring Alarms, page 5-2
• FCS Error Hysteresis Threshold, page 5-2
• Port Status Monitoring Alarms, page 5-2
• Triggering Alarm Options, page 5-3
Global Status Monitoring Alarms
The switch processes alarms related power supply conditions, referred to as global or facility alarms.
FCS Error Hysteresis Threshold
The Ethernet standard calls for a maximum bit error rate of 10
-8
. On the switch, 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 percentage 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 5-8 for more information.
Port Status Monitoring Alarms
The switch can also monitor the status of the Ethernet ports and generate alarm messages based on the
alarms listed in Table 5-2. 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.
Alarm profiles provide a mechanism for you to enable or disable alarm conditions for a port and
associate the alarm conditions with one or both alarm relays. You can also use alarm profiles to set alarm
conditions to send alarm traps to an SNMP server and system messages to a syslog server. The alarm
profile defaultPort is applied to all interfaces in the factory configuration (by default).
Table 5-1 Switch Global Status Monitoring Alarms
Alarm Description
Power supply alarm The switch monitors dual power supply levels. If there are two power supplies
installed in the switch, an alarm triggers if a power supply fails. The alarm is
automatically cleared when both power supplies are working. 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 5-7.