Chapter 12 Managing Alarms

Creating, Editing, and Duplicating Alarm Thresholds

Table 12-21

Unknown NAD

 

 

 

 

Option

 

Description

 

 

Unknown NAD count

greater than num in the past time MinutesHours for a object, where:

 

 

num values can be any five-digit number greater than or equal to zero (0).

 

 

time values can be 1 to 1440 minutes, or 1 to 24 hours.

 

 

MinutesHours value can be Minutes or Hours.

 

 

object values can be:

 

 

 

ACS Instance

 

 

 

Device IP

 

 

 

 

 

Filter

 

 

 

 

 

 

 

ACS Instance

 

Click Select to choose a valid ACS instance on which to configure your threshold.

 

 

 

Device IP

 

Click Select to choose or enter a valid device IP address on which to configure your threshold.

 

 

 

Protocol

 

Use the drop-down list box to configure the protocol that you want to use for your threshold. Valid

 

 

options are:

 

 

RADIUS

 

 

TACACS+

 

 

 

 

 

Related Topics

Creating, Editing, and Duplicating Alarm Thresholds, page 12-11

Configuring General Threshold Information, page 12-13

Configuring Threshold Notifications, page 12-32

External DB Unavailable

When ACS evaluates this threshold, it examines the RADIUS or TACACS+ failed authentications that have occurred during the specified interval up to the previous 24 hours.

From these failed authentications, ACS identifies those with the failure reason, External DB unavailable. Authentication records with this failure reason are grouped by a common attribute, such as ACS instance, user, and so on, and a count of the records within each of those groups is computed.

If the count of records for any group exceeds the specified threshold, an alarm is triggered. This can happen if, for example, you configure a threshold as follows:

External DB Unavailable count greater than 5 in the past one hour for a Device IP

If in the past hour, failed authentications with an External DB Unavailable failure reason have occurred for two different device IP addresses as shown in the following table, an alarm is triggered, because at least one device IP address has a count greater than 5.

Device IP

Count of External DB Unavailable Authentication Records

 

 

a.b.c.d

6

 

 

e.f.g.h

1

 

 

 

User Guide for Cisco Secure Access Control System 5.3

12-28

OL-24201-01

Page 356
Image 356
Cisco Systems OL-24201-01 manual External DB Unavailable, 12-28