ME 3800x and ME 3600x Switches Software Configuration Guide, Release 15.2(4)S
Configuring Switch Alarms
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Configuring the Switch External Alarms

Table Of Contents

Configuring the Switch External Alarms

Understanding Switch Alarms

Configuring Switch Alarms

Configuring the Switch External Alarms

On the ME 3800X and ME 3600X switch, you can configure external alarm inputs.

Understanding Switch Alarms

You can connect up to four alarm inputs from external devices in your environment, such as a door, a temperature gauge, or a fire alarm, to the alarm input port on the switch front panel. Figure 7-1 shows the location of the alarm pinouts.

Figure 7-1 Alarm Input Port Pinouts

For each alarm input, you can configure an open or closed circuit to trigger an alarm and configure the severity of the alarm. A triggered alarm generates an system message. If you enter a descriptive name for the alarm, that name is included in the system message. A triggered alarm also turns on the LED display (the LED is normally off, meaning no alarm). See the Cisco ME-3800X and ME 3600X Hardware Installation Guide for information about the LEDs.

The alarm trigger setting is open or closed. If not set, the alarm is triggered when the circuit closes.

Open means that the normal condition has current flowing through the contact (normally closed contact). The alarm is generated when the current stops flowing.

Closed means that no current flows through the contact (normally open contact). The alarm is generated when current does flow.

You can set the alarm severity to minor, major, or critical. The severity is included in the alarm message and also sets the LED color when the alarm is triggered. The LED is amber for a minor alarm, red for a major alarm, and blinking red for a critical alarm. If not set, the default alarm severity is minor.

Configuring Switch Alarms

Beginning in privileged EXEC mode, follow these steps to configure alarm contacts.


Step 1 

configure terminal

Enter global configuration mode.

Step 2 

alarm-contact contact-number description string

(Optional) Configure a description for the alarm contact number.

The contact-number can be from 1 to 4.

The description string can be up to 80 alphanumeric characters in length and is included in any generated system messages.

Step 3 

alarm-contact {contact-number | all

{severity {critical | major | minor} | trigger {closed | open}}

Configure the trigger and severity for an alarm contact number or for all contact numbers.

Enter a contact number (1 to 4) or specify that you are configuring all alarms. See Figure 7-1 for the alarm contact pinouts.

For severity, enter critical, major, or minor. If you do not configure a severity, the default is minor.

For trigger, enter open or closed. If you do not configure a trigger, the alarm is triggered when the circuit is closed.

Step 4 


Return to privileged EXEC mode.

Step 5 

show env alarm-contact

Show the configured alarm contacts.

Step 6 

copy running-config startup-config

(Optional) Save your entries in the configuration file.

To delete the alarm description, enter the no alarm-contact contact-number description privileged EXEC command. To set the alarm severity to minor (the default), enter the no alarm-contact {contact-number | all} severity. To set the alarm contact trigger to closed (the default), enter the no alarm-contact {contact-number | all} trigger.

To see the alarm configuration and status, enter the show env alarm-contact privileged EXEC command.

For more detailed information about the alarm commands, see the command reference for this release.

Note The switch supports the CISCO-ENTITY-ALARM-MIB for these alarms.

This example configures alarm input 2 named door sensor to assert a major alarm when the door circuit is closed and then displays the status and configuration for all alarms:

Switch(config)# alarm-contact 2 description door sensor
Switch(config)# alarm-contact 2 severity major
Switch(config)# alarm-contact 2 trigger closed
Switch(config)# end
Switch(config)# show env alarm-contact
Switch# show env alarm-contact
   Status:      not asserted
   Description: test_1
   Severity:    critical
   Trigger:     open
   Status:      not asserted
   Description: door sensor
   Severity:    major
   Trigger:     closed
   Status:      not asserted
   Description: flood sensor
   Severity:    critical
   Trigger:     closed
   Status:      not asserted
   Severity:    critical
   Trigger:     closed