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Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2
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Chapter 10 Alarm Monitoring and Management
Alarm Severities
on the card in the History > Card window, or a history of alarms, conditions, and transients that have
occurred during your login session in the History > Session window. You can also filter the severities
and occurrence period in these history windows.

10.2.8 Alarm History and Log Buffer Capacities

The ONS 15310-MA SDH alarm history log, stored in the 15310E-CTX-K9 RSA memory, contains four
categories of alarms. These include:
• CR severity alarms
• MJ severity alarms
• MN severity alarms
• the combined group of cleared, Not Alarmed severity, and Not Reported severity alarms
Each category can store between 4 and 640 alarm chunks, or entries. In each category, when the upper
limit is reached, the oldest entry in the category is deleted. The capacity is not user-provisionable.
CTC also has a log buffer, separate from the alarm history log, that pertains to the total number of entries
displayed in the Alarms, Conditions, and History windows. The total capacity is provisionable up to
5,000 entries. When the upper limit is reached, the oldest entries are deleted.
10.3 Alarm Severities
A condition may be Alarmed at a severity of Critical (CR), Major (MJ), or Minor (MN) with a severity
of Not Alarmed (NA) or Not Reported (NR). These severities are reported in the CTC software Alarms,
Conditions, and History windows at all levels: network, node, and card.
ONS equipment provides a standard profile named “Default” that lists all alarms and conditions with
severity settings, but users can create their own profiles with different settings for some or all conditions
and apply these wherever needed. (See the “10.4 Alarm Profiles” section on page 10-9 for more
information.) For example, in a custom alarm profile, the default severity of a carrier loss (CARLOSS)
alarm on an Ethernet port can be changed from Major to Critical.
Critical and Major severities are only used for service-affecting alarms. If a condition is set as Critical
or Major by profile, it will raise as a Minor alarm in the following situations:
• In a protection group, if the alarm is on a standby entity (side not carrying traffic)
• If the alarmed entity has no traffic provisioned on it, so no service is lost
Because the alarm might be raised at two different levels, the alarm profile pane shows Critical as “CR
/ MN” and Major as “MJ / MN.”
10.4 Alarm Profiles
The alarm profiles feature allows you to change default alarm severities by creating unique alarm profiles
for individual ONS 15310-MA SDH ports, cards, or nodes. A created alarm profile can be applied to any
node on the network. Alarm profiles can be saved to a file and imported elsewhere in the network, but
the profile must be stored locally on a node before it can be applied to the node, cards, or ports.