Cisco ASR 9000 Series Aggregation Services Router System Monitoring Configuration Guide
Implementing and Monitoring Alarms and Alarm Log Correlation on Cisco ASR 9000 Series Router
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Implementing and Monitoring Alarms and Alarm Log Correlation on Cisco ASR 9000 Series Router

Table Of Contents

Implementing and Monitoring Alarms and Alarm Log Correlation on Cisco ASR 9000 Series Router

Contents

Prerequisites for Implementing and Monitoring Alarms and Alarm Log Correlation

Information About Implementing Alarms and Alarm Log Correlation

Alarm Logging and Debugging Event Management System

Correlator

System Logging Process

Alarm Logger

Logging Correlation

Correlation Rules

Types of Correlation

Application of Rules and Rule Sets

Root Message and Correlated Messages

Alarm Severity Level and Filtering

Bistate Alarms

Capacity Threshold Setting for Alarms

Hierarchical Correlation

Context Correlation Flag

Duration Timeout Flags

Reparent Flag

Reissue Nonbistate Flag

Internal Rules

How to Implement and Monitor Alarm Management and Logging Correlation

Configuring Logging Correlation Rules

Configuring Logging Correlation Rule Sets

Configuring Root-cause and Non-root-cause Alarms

Configuring Hierarchical Correlation Rule Flags

What To Do Next

Applying Logging Correlation Rules

Applying Logging Correlation Rule Sets

Modifying Logging Events Buffer Settings

Modifying Logging Correlator Buffer Settings

Displaying Alarms by Severity and Severity Range

Displaying Alarms According to a Time Stamp Range

Displaying Alarms According to Message Group and Message Code

Displaying Alarms According to a First and Last Range

Displaying Alarms by Location

Displaying Alarms by Event Record ID

Displaying the Logging Correlation Buffer Size, Messages, and Rules

Clearing Alarm Event Records and Resetting Bistate Alarms

Configuration Examples for Alarm Management and Logging Correlation

Increasing the Severity Level for Alarm Filtering to Display Fewer Events and Modifying the Alarm Buffer Size and Capacity Threshold: Example

Configuring a Nonstateful Correlation Rule to Permanently Suppress Node Status Messages: Example

Configuring a Stateful Correlation Rule for LINK UPDOWN and SONET ALARM Alarms: Example

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance


Implementing and Monitoring Alarms and Alarm Log Correlation on Cisco ASR 9000 Series Router


This module describes the concepts and tasks related to configuring alarm log correlation and monitoring alarm logs and correlated event records. Alarm log correlation extends system logging to include the ability to group and filter messages generated by various applications and system servers and to isolate root messages on the router.

This module describes the new and revised tasks you need to perform to implement logging correlation and monitor alarms on Cisco ASR 9000 Series Aggregation Services Routers.


Note For more information about system logging on Cisco IOS XR software and complete descriptions of the alarm management and logging correlation commands listed in this module, see the "Related Documents" section of this module. To locate documentation for other commands that might appear in the course of performing a configuration task, search online in the Cisco ASR 9000 Series Aggregation Services Router Commands Master List .


Feature History for Implementing and Monitoring Alarms and Alarm Log Correlation on Cisco ASR 9000 Series Router

Release
Modification

Release 3.7.2

This feature was introduced on the Cisco ASR 9000 Series Router.

Release 3.9.0

No modification.


Contents

Prerequisites for Implementing and Monitoring Alarms and Alarm Log Correlation

Information About Implementing Alarms and Alarm Log Correlation

How to Implement and Monitor Alarm Management and Logging Correlation

Configuration Examples for Alarm Management and Logging Correlation

Additional References

Prerequisites for Implementing and Monitoring Alarms and Alarm Log Correlation

You must be in a user group associated with a task group that includes the proper task IDs. The command reference guides include the task IDs required for each command. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Information About Implementing Alarms and Alarm Log Correlation

To implement alarms and alarm correlation, you should be familiar with the following concepts:

Alarm Logging and Debugging Event Management System

Logging Correlation

Application of Rules and Rule Sets

Alarm Severity Level and Filtering

Bistate Alarms

Capacity Threshold Setting for Alarms

Hierarchical Correlation

Context Correlation Flag

Duration Timeout Flags

Reparent Flag

Reissue Nonbistate Flag

Internal Rules

Alarm Logging and Debugging Event Management System

Cisco IOS XR software Alarm Logging and Debugging Event Management System (ALDEMS) is used to monitor and store alarm messages that are forwarded by system servers and applications. In addition, ALDEMS correlates alarm messages forwarded due to a single root cause.

ALDEMS enlarges on the basic logging and monitoring functionality of Cisco IOS XR software, providing the level of alarm and event management necessary for a highly distributed system

Cisco IOS XR software achieves this necessary level of alarm and event management by distributing logging applications across the nodes on the system.

Figure 1 illustrates the relationship between the components that constitute ALDEMS.

Figure 1 ALDEMS Component Communications

Correlator

The correlator receives messages from system logging (syslog) helper processes that are distributed across the nodes on the router and forwards syslog messages to the syslog process. If a logging correlation rule is configured, the correlator captures messages searching for a match with any message specified in the rule. If the correlator finds a match, it starts a timer that corresponds to the timeout interval specified in the rule. The correlator continues searching for a match to messages in the rule until the timer expires. If the root case message was received, then a correlation occurs; otherwise, all captured messages are forwarded to the syslog. When a correlation occurs, the correlated messages are stored in the logging correlation buffer. The correlator tags each set of correlated messages with a correlation ID.


Note For more information about logging correlation, see the Logging Correlation section.


System Logging Process

By default, routers are configured to send system logging messages to a system logging (syslog) process. Syslog messages are gathered by syslog helper processes that are distributed across the nodes on the system. The system logging process controls the distribution of logging messages to the various destinations, such as the system logging buffer, the console, terminal lines, or a syslog server, depending on the network device configuration.

Alarm Logger

The alarm logger is the final destination for system logging messages forwarded on the router. The alarm logger stores alarm messages in the logging events buffer. The logging events buffer is circular; that is, when full, it overwrites the oldest messages in the buffer.


Note Alarms are prioritized in the logging events buffer. When it is necessary to overwrite an alarm record, the logging events buffer overwrites messages in the following order: nonbistate alarms first, then bistate alarms in the CLEAR state, and, finally, bistate alarms in the SET state. For more information about bistate alarms, see the Bistate Alarms section.


When the table becomes full of messages caused by bistate alarms in the SET state, the earliest bistate message (based on the message time stamp, not arrival time) is reclaimed before others. The buffer size for the logging events buffer and the logging correlation buffer, thus, should be adjusted so that memory consumption is within your requirements.

A table-full alarm is generated each time the logging events buffer wraps around. A threshold crossing notification is generated each time the logging events buffer reaches the capacity threshold.

Messages stored in the logging events buffer can be queried by clients to locate records matching specific criteria. The alarm logging mechanism assigns a sequential, unique ID to each alarm message.

Logging Correlation

Logging correlation can be used to isolate the most significant root messages for events affecting system performance. For example, the original message describing a card online insertion and removal (OIR) of a card can be isolated so that only the root-cause message is displayed and all subsequent messages related to the same event are correlated. When correlation rules are configured, a common root event that is generating secondary (non-root-cause) messages can be isolated and sent to the syslog, while secondary messages are suppressed. An operator can retrieve all correlated messages from the logging correlator buffer to view correlation events that have occurred.

Correlation Rules

Correlation rules can be configured to isolate root messages that may generate system alarms. Correlation rules prevent unnecessary stress on ALDEMS caused by the accumulation of unnecessary messages. Each correlation rule hinges on a message identification, consisting of a message category, message group name, and message code. The correlator process scans messages for occurrences of the message.

If the correlator receives a root message, the correlator stores it in the logging correlator buffer and forwards it to the syslog process on the RP. From there, the syslog process forwards the root message to the alarm logger in which it is stored in the logging events buffer. From the syslog process, the root message may also be forwarded to destinations such as the console, remote terminals, remote servers, the fault management system, and the Simple Network Management Protocol (SNMP) agent, depending on the network device configuration. Subsequent messages meeting the same criteria (including another occurrence of the root message) are stored in the logging correlation buffer and are forwarded to the syslog process on the router.

If a message matches multiple correlation rules, all matching rules apply and the message becomes a part of all matching correlation queues in the logging correlator buffer.

The following message fields are used to define a message in a logging correlation rule:

Message category

Message group

Message code

Wildcards can be used for any of the message fields to cover wider set of messages. Configure the appropriate set of messages in a logging correlation rule configuration to achieve correlation with a narrow or wide scope (depending on your objective).

Types of Correlation

There are two types of correlation that are configured in rules to isolate root-cause messages:

Nonstateful Correlation—This correlation is fixed after it has occurred, and non-root-cause alarms that are suppressed are never forwarded to the syslog process. All non-root-cause alarms remain buffered in correlation buffers.

Stateful Correlation—This correlation can change after it has occurred, if the bistate root-cause alarm clears. When the alarm clears, all the correlated non-root-cause alarms are sent to syslog and are removed from the correlation buffer. Stateful correlations are useful to detect non-root-cause conditions that continue to exist even if the suspected root cause no longer exists.

Application of Rules and Rule Sets

If a correlation rule is applied to the entire router, then correlation takes place only for those messages that match the configured cause values for the rule, regardless of the context or location setting of that message.

If a correlation rule is applied to a specific set of contexts or locations, then correlation takes place only for those messages that match the configured cause values for the rule and that match at least one of those contexts or locations.

In the case of a rule-set application, the behavior is the same; however, the apply configuration takes place for all rules that are part of the given rule set.

The show logging correlator rule command is used to display apply settings for a given rule, including those settings that have been configured with the logging correlator apply ruleset command.

Root Message and Correlated Messages

When a correlation rule is configured and applied, the correlator starts searching for a message match as specified in the rule. After a match is found, the correlator starts a timer corresponding to the timeout interval that is also specified in the rule. A message search for a match continues until the timer expires. Correlation occurs after the root-cause message is received.

The first message (with category, group, and code triplet) configured in a correlation rule defines the root-cause message. A root-cause message is always forwarded to the syslog process. See the Correlation Rules section to learn how the root-cause message is forwarded and stored.

Alarm Severity Level and Filtering

Filter settings can be used to display information based on severity level. The alarm filter display indicates the severity level settings used to report alarms, the number of records, and the current and maximum log size.

Alarms can be filtered according to the severity level shown in Table 1

Table 1 Alarm Severity Levels for Event Logging  

Severity Level
System Condition

0

Emergencies

1

Alerts

2

Critical

3

Errors

4

Warnings

5

Notifications

6

Informational


Bistate Alarms

Bistate alarms are generated by state changes associated with system hardware, such as a change of interface state from active to inactive, the online insertion and removal (OIR) of a card, or a change in component temperature. Bistate alarm events are reported to the logging events buffer by default; informational and debug messages are not.

Cisco IOS XR software provides the ability to reset and clear alarms. Clients interested in monitoring alarms in the system can register with the alarm logging mechanism to receive asynchronous notifications when a monitored alarm changes state.

Bistate alarm notifications provide the following information:

The alarm state, which may be in the set state or the clear state.

Capacity Threshold Setting for Alarms

The capacity threshold setting determines when the alarm system begins reporting threshold crossing alarms. The capacity threshold for generating warning alarms is generally set at 80 percent of buffer capacity, but individual configurations may require different settings.

Hierarchical Correlation

Hierarchical correlation takes effect when the following conditions are true:

When a single alarm is both a root cause for one rule and a non-root cause for another rule.

When alarms are generated that result in successful correlations associated with both rules.

The following example illustrates two hierarchical correlation rules:

Rule 1
Category
Group
Code

Root Cause 1

Cat 1

Group 1

Code 1

Non-root Cause 2

Cat 2

Group 2

Code 2

Rule 2

Root Cause 2

Cat 2

Group 2

Code 2

Non-root Cause 3

Cat 3

Group 3

Code 3


If three alarms are generated for Cause 1, 2, and 3, with all alarms arriving within their respective correlation timeout periods, then the hierarchical correlation appears like this:

Cause 1 -> Cause 2 -> Cause 3

The correlation buffers show two separate correlations: one for Cause 1 and Cause 2 and the second for Cause 2 and Cause 3. However, the hierarchical relationship is implicitly defined.


Note Stateful behavior, such as reparenting and reissuing of alarms, is supported for rules that are defined as stateful; that is, correlations that can change.


Context Correlation Flag

The context correlation flag allows correlations to take place on a "per context" basis or not.

This flag causes behavior change only if the rule is applied to one or more contexts. It does not go into effect if the rule is applied to the entire router or location nodes.

The following is a scenario of context correlation behavior:

Rule 1 has a root cause A and an associated non-root cause.

Context correlation flag is not set on Rule 1.

Rule 1 is applied to contexts 1 and 2.

If the context correlation flag is not set on Rule 1, a scenario in which alarm A generated from context 1 and alarm B generated from context 2 results in the rule applying to both contexts regardless of the type of context.

If the context correlation flag is now set on Rule 1 and the same alarms are generated, they are not correlated as they are from different contexts.

With the flag set, the correlator analyzes alarms against the rule only if alarms arrive from the same context. In other words, if alarm A is generated from context 1 and alarm B is generated from context 2, then a correlation does not occur.

Duration Timeout Flags

The root-cause timeout (if specified) is the alternative rule timeout to use in the situation in which a non-root-cause alarm arrives before a root-cause alarm in the given rule. It is typically used to give a shorter timeout in a situation under the assumption that it is less likely that the root-cause alarm arrives, and, therefore, releases the hold on the non-root-cause alarms sooner.

Reparent Flag

The reparent flag specifies what happens to non-root-cause alarms in a hierarchical correlation when their immediate root cause clears.

The following example illustrates context correlation behavior:

Rule 1 has a root cause A and an associated non-root cause B

Context correlation flag is not set on Rule 1

Rule 1 is applied to contexts 1 and 2

In this scenario, if alarm A arrives generated from context 1 and alarm B generated from context 2, then a correlation occurs—regardless of context.

If the context correlation flag is now set on Rule 1 and the same alarms are generated, they are not correlated, because they are from different contexts.

Reissue Nonbistate Flag

The reissue nonbistate flag controls whether nonbistate alarms (events) are forwarded from the correlator log if their parent bistate root-cause alarm clears. Active bistate non-root-causes are always forwarded in this situation, because the condition is still present.

The reissue-nonbistate flag allows you to control whether non-bistate alarms are forwarded.

Internal Rules

Internal rules are defined on Cisco IOS XR software and are used by protocols and processes within Cisco IOS XR software. These rules are not customer configurable, but you may view them by using the show logging correlator rule command. All internal rule names are prefixed with [INTERNAL].

How to Implement and Monitor Alarm Management and Logging Correlation

This section contains the following tasks:

Configuring Logging Correlation Rules (required)

Configuring Root-cause and Non-root-cause Alarms (required)

Configuring Hierarchical Correlation Rule Flags (optional)

Applying Logging Correlation Rules (required)

Applying Logging Correlation Rule Sets (required)

Modifying Logging Events Buffer Settings (optional)

Modifying Logging Correlator Buffer Settings (optional)

Displaying Alarms by Severity and Severity Range (optional)

Displaying Alarms According to a Time Stamp Range (optional)

Displaying Alarms According to Message Group and Message Code (optional)

Displaying Alarms According to a First and Last Range (optional)

Displaying Alarms by Location (optional)

Displaying Alarms by Event Record ID (optional)

Displaying the Logging Correlation Buffer Size, Messages, and Rules (optional)

Clearing Alarm Event Records and Resetting Bistate Alarms (optional)

Configuring Logging Correlation Rules

This task explains how to configure logging correlation rules.

The purpose of configuring logging correlation rules is to define the root cause and non-root-cause alarm messages (with message category, group, and code combinations) for logging correlation. The originating root-cause alarm message is forwarded to the syslog process, and all subsequent (non-root-cause) alarm messages are sent to the logging correlation buffer.

The fields inside a message that can be used for configuring correlation rules are as follows:

Message category (for example, PKT_INFRA, MGBL, OS)

Message group (for example, LINK, LINEPROTO, or OIR)

Message code (for example, UPDOWN or GO_ACTIVE).

The logging correlator mechanism, running on the active route processor, begins queueing messages matching the ones specified in the correlation rules for the time specified in the timeout interval of the correlation rule.

The timeout interval begins when the correlator captures any alarm message specified for a given rule.

SUMMARY STEPS

1. configure

2. logging correlator rule correlation-rule {type {stateful | nonstateful}}

3. timeout [milliseconds]

4. end
or
commit

5. show logging correlator rule {all | correlation-rule1...correlation-rule14} [context context1...context 6] [location node-id1...node-id6] [rulesource {internal | user}] [ruletype {nonstateful | stateful}] [summary | detail]

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

configure

Example:

RP/0/RSP0/CPU0:router# configure

Enters global configuration mode.

Step 2 

logging correlator rule correlation-rule {type {stateful | nonstateful}}

Example:

RP/0/RSP0/CPU0:router(config)# logging correlator rule rule_stateful

Configures a logging correlation rule.

Stateful correlations can change specifically if the root-cause alarm is bistate.

Nonstate correlations cannot change. All non-root-cause alarms remain in the correlation buffers.

Step 3 

timeout [milliseconds]

Example:

RP/0/RSP0/CPU0:router(config-corr-rule-st)# timeout 60000

Specifies the collection period duration time for the logging correlator rule message.

Timeout begins when the first alarm message identified by the correlation rule is logged.

Step 4 

end

or

commit

Example:

RP/0/RSP0/CPU0:router(config)# end

or

RP/0/RSP0/CPU0:router(config)# commit

Saves configuration changes.

When you issue the end command, the system prompts you to commit changes:

Uncommitted changes found, commit them before 
exiting(yes/no/cancel)? 
[cancel]:
 
        

Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode.

Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes.

Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.

Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Step 5 

show logging correlator rule {all | correlation-rule1...correlation-rule14} [context context1...context 6] [location node-id1...node-id6] [rulesource {internal | user}] [ruletype {nonstateful | stateful}] [summary | detail]

Example:

RP/0/RSP0/CPU0:router# show logging correlator rule all

(Optional) Displays defined correlation rules.

The output describes the configuration of each rule name, including the message category, group, and code information.


Configuring Logging Correlation Rule Sets

This task explains how to configure logging correlation rule sets.

SUMMARY STEPS

1. configure

2. logging correlator ruleset ruleset

3. rulename rulename

4. end
or
commit

5. show logging correlator ruleset {all | correlation-ruleset1...correlation-ruleset14} [detail | summary]

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

configure

Example:

RP/0/RSP0/CPU0:router# configure

Enters global configuration mode.

Step 2 

logging correlator ruleset ruleset

Example:

RP/0/RSP0/CPU0:router(config)# logging correlator ruleset ruleset1

Configures a logging correlation rule set.

Step 3 

rulename rulename

Example:

RP/0/RSP0/CPU0:router(config-corr-ruleset)# rulename stateful_rule

Configures a rule name.

Step 4 

end

or

commit

Example:

RP/0/RSP0/CPU0:router(config)# end

or

RP/0/RSP0/CPU0:router(config)# commit

Saves configuration changes.

When you issue the end command, the system prompts you to commit changes:

Uncommitted changes found, commit them before 
exiting(yes/no/cancel)? 
[cancel]:
 
        

Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode.

Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes.

Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.

Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Step 5 

show logging correlator ruleset {all | correlation-ruleset1...correlation-ruleset14} [detail | summary]

Example:

RP/0/RSP0/CPU0:router# show logging correlator ruleset all

(Optional) Displays defined correlation rule sets.


Configuring Root-cause and Non-root-cause Alarms

To correlate a root cause to one or more non-root-cause alarms and configure them to a rule, use the rootcause and nonrootcause commands specified for the correlation rule.

SUMMARY STEPS

1. configure

2. logging correlator rule correlation-rule {type {stateful | nonstateful}}

3. rootcause {msg-category group-name msg-code}

4. nonrootcause

5. alarm msg-category group-name msg-code

6. end
or
commit

7. show logging correlator rule {all | correlation-rule1...correlation-rule14} [context context1...context 6] [location node-id1...node-id6] [rulesource {internal | user}] [ruletype {nonstateful | stateful}] [summary | detail]

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

configure

Example:

RP/0/RSP0/CPU0:router# configure

Enters global configuration mode.

Step 2 

logging correlator rule correlation-rule {type {stateful | nonstateful}}

Example:

RP/0/RSP0/CPU0:router(config)# logging correlator rule rule_stateful

Configures a logging correlation rule and enters submodes for stateful and nonstateful rule types.

Stateful correlations can change specifically if the root-cause alarm is bistate.

Nonstate correlations cannot change. All non-root-cause alarms remain in the correlation buffers.

Step 3 

rootcause {msg-category group-name msg-code}

Example:

RP/0/RSP0/CPU0:router(config-corr-rule-st)# rootcause CAT_BI_1 GROUP_BI_1 CODE_BI_1

Configures a root-cause alarm message.

This example specifies a root-cause alarm under stateful configuration mode

Step 4 

nonrootcause

Example:

RP/0/RSP0/CPU0:router(config-corr-rule-st)# nonrootcause

Enters the non-root-cause configuration mode

Step 5 

alarm msg-category group-name msg-code

Example:

RP/0/RSP0/CPU0:router(config-corr-rule-st-nonrc )# alarm CAT_BI_2 GROUP_BI_2 CODE_BI_2

Specifies a non-root-cause alarm message.

This command can be issued with the nonrootcause command, such as

nonrootcause alarm msg-category group-name 
msg-code

Step 6 

end

or

commit

Example:

RP/0/RSP0/CPU0:router(config)# end

or

RP/0/RSP0/CPU0:router(config)# commit

Saves configuration changes.

When you issue the end command, the system prompts you to commit changes:

Uncommitted changes found, commit them before 
exiting(yes/no/cancel)? 
[cancel]:
 
        

Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode.

Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes.

Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.

Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Step 7 

show logging correlator rule {all | correlation-rule1...correlation-rule14} [context context1...context 6] [location node-id1...node-id6] [rulesource {internal | user}] [ruletype {nonstateful | stateful}] [summary | detail]

Example:

RP/0/RSP0/CPU0:router# show logging correlator rule all

(Optional) Displays the correlator rules that are defined.


Configuring Hierarchical Correlation Rule Flags

Hierarchical correlation is when a single alarm is both a root cause for one correlation rule and a non-root cause for another rule, and when alarms are generated resulting in a successful correlation associated with both rules. What happens to a non-root-cause alarm hinges on the behavior of its correlated root-cause alarm.

There are cases in which you want to control the stateful behavior associated with these hierarchies and to implement flags, such as reparenting and reissuing of nonbistate alarms. This task explains how to implement these flags.

See the Reparent Flag and Reissue Nonbistate Flag sections for detailed information about these flags.

SUMMARY STEPS

1. configure

2. logging correlator rule correlation-rule {type {stateful | nonstateful}}

3. reissue-nonbistate

4. reparent

5. end
or
commit

6. show logging correlator rule {all | correlation-rule1...correlation-rule14} [context context1...context 6] [location node-id1...node-id6] [rulesource {internal | user}] [ruletype {nonstateful | stateful}] [summary | detail]

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

configure

Example:

RP/0/RSP0/CPU0:router# configure

Enters global configuration mode.

Step 2 

logging correlator rule correlation-rule {type {stateful | nonstateful}}

Example:

RP/0/RSP0/CPU0:router(config)# logging correlator rule rule_stateful type nonstateful

Configures a logging correlation rule.

Stateful correlations can change specifically if the root-cause alarm is bistate.

Nonstateful correlations cannot change. All non-root-cause alarms remain in the correlation buffers.

Step 3 

reissue-nonbistate

Example:

RP/0/RSP0/CPU0:router(config-corr-rule-st)# reissue-nonbistate

Issues nonbistate alarm messages (events) from the correlator log after its root-cause alarm clears.

Step 4 

reparent

Example:

RP/0/RSP0/CPU0:router(config-corr-rule-st)# reparent

Specifies the behavior of non-root-cause alarms after a root-cause parent clears.

Step 5 

end

or

commit

Example:

RP/0/RSP0/CPU0:router(config)# end

or

RP/0/RSP0/CPU0:router(config)# commit

Saves configuration changes.

When you issue the end command, the system prompts you to commit changes:

Uncommitted changes found, commit them before 
exiting(yes/no/cancel)? 
[cancel]:
 
        

Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode.

Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes.

Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.

Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Step 6 

show logging correlator rule {all | correlation-rule1...correlation-rule14} [context context1...context 6] [location node-id1...node-id6] [rulesource {internal | user}] [ruletype {nonstateful | stateful}] [summary | detail]

Example:

RP/0/RSP0/CPU0:router# show logging correlator rule all

(Optional) Displays the correlator rules that are defined.


What To Do Next

To activate a defined correlation rule and rule set, you must apply them by using the logging correlator apply rule and logging correlator apply ruleset commands.

Applying Logging Correlation Rules

This task explains how to apply logging correlation rules.

Applying a correlation rule activates it and gives a scope. A single correlation rule can be applied to multiple scopes on the router; that is, a rule can be applied to the entire router, to several locations, or to several contexts.


Note When a rule is applied or if a rule set that contains this rule is applied, then the rule definition cannot be modified through the configuration until the rule or rule set is once again unapplied.



Note It is possible to configure apply settings at the same time for both a rule and rule sets that contain the rule. In this case, the apply settings for the rule are the union of all these apply configurations.


SUMMARY STEPS

1. configure

2. logging correlator apply rule correlation-rule

3. all-of-router
or
location node-id
or
context name

4. end
or
commit

5. show logging correlator rule {all | correlation-rule1...correlation-rule14} [context context1...context 6] [location node-id1...node-id6] [rulesource {internal | user}] [ruletype {nonstateful | stateful}] [summary | detail]

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

configure

Example:

RP/0/RSP0/CPU0:router# configure

Enters global configuration mode.

Step 2 

logging correlator apply rule correlation-rule

Example:

RP/0/RSP0/CPU0:router(config)# logging correlator apply-rule rule1

Applies and activates a correlation rule and enters correlation apply rule configuration mode.

Step 3 

all-of-router
or

location node-id

or

context name

Example:

RP/0/RSP0/CPU0:router(config-corr-apply-rule)# all-of-router

or

RP/0/RSP0RP00/CPU0:router(config-corr-apply-rul e)# location 0/2/CPU0

 

Applies a logging correlation rule to all nodes on the router.

Applies a logging correlation rule to a specific node on the router.

The location of the node is specified in the format rack/slot/module.

Applies a logging correlation rule to a specific context.

Step 4 

end

or

commit

Example:

RP/0/RSP0/CPU0:router(config)# end

or

RP/0/RSP0/CPU0:router(config)# commit

Saves configuration changes.

When you issue the end command, the system prompts you to commit changes:

Uncommitted changes found, commit them before 
exiting(yes/no/cancel)? 
[cancel]:
 
        

Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode.

Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes.

Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.

Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Step 5 

show logging correlator rule {all | correlation-rule1...correlation-rule14} [context context1...context 6] [location node-id1...node-id6] [rulesource {internal | user}] [ruletype {nonstateful | stateful}] [summary | detail]

Example:

RP/0/RSP0/CPU0:router# show logging correlator rule all

(Optional) Displays the correlator rules that are defined.


Applying Logging Correlation Rule Sets

This task explains how to apply logging correlation rule sets.

Applying a correlation rule set activates it and gives a scope. When applied, a single rule-set configuration immediately effects the rules that are part of that given rule set.


Note Rule definitions that were previously applied (singly or as part of another rule set) cannot be modified until that rule or rule set is unapplied. Use the no form of the command to negate usage and then try to reapply rule set.


SUMMARY STEPS

1. configure

2. logging correlator apply ruleset correlation-rule

3. all-of-router
or
location node-id
or
context name

4. end
or
commit

5. show logging correlator ruleset {all | correlation-ruleset1...correlation-ruleset14} [detail | summary]

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

configure

Example:

RP/0/RSP0/CPU0:router# configure

Enters global configuration mode.

Step 2 

logging correlator apply ruleset correlation-rule

Example:

RP/0/RSP0/CPU0:router(config)# logging correlator apply ruleset ruleset2

Applies and activates a rule set and enters correlation apply rule set configuration mode.

Step 3 

all-of-router

or

location node-id

or

context name

Example:

RP/0/RSP0/CPU0:router(config-corr-ruleset)# all-of-router

or

RP/0/RSP0/CPU0:router(config-corr-ruleset)# location 0/2/CPU0

or

RP/0/RSP0/CPU0:router(config-corr-ruleset)# context

Applies a logging correlation rule set to all nodes on the router.

Applies a logging correlation rule set to a specific node on the router.

The location of the node is specified in the format rack/slot/module.

Applies a logging correlation rule set to a specific context.

Step 4 

end

or

commit

Example:

RP/0/RSP0/CPU0:router(config)# end

or

RP/0/RSP0/CPU0:router(config)# commit

Saves configuration changes.

When you issue the end command, the system prompts you to commit changes:

Uncommitted changes found, commit them before 
exiting(yes/no/cancel)? 
[cancel]:
 
        

Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode.

Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes.

Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.

Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Step 5 

show logging correlator ruleset {all | correlation-ruleset1...correlation-ruleset14} [detail | summary]

Example:

RP/0/RSP0/CPU0:router# show logging correlator ruleset all

(Optional) Displays the correlator rules that are defined.


Modifying Logging Events Buffer Settings

Logging events buffer settings can be adjusted to respond to changes in user activity, network events, or system configuration events that affect network performance, or in network monitoring requirements. The appropriate settings depend on the configuration and requirements of the system.

This task involves the following steps:

Modifying logging events buffer size

Setting threshold for generating alarms

Setting the alarm filter (severity)


Caution Modifications to alarm settings that lower the severity level for reporting alarms and threshold for generating capacity-warning alarms may slow system performance.


Caution Modifying the logging events buffer size clears the buffer of all event records except for the bistate alarms in the set state.

SUMMARY STEPS

1. show logging events info

2. configure

3. logging events buffer-size bytes

4. logging events threshold percent

5. logging events level severity

6. end
or
commit

7. show logging events info

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

show logging events info

Example:

RP/0/RSP0/CPU0:router# show logging events info

(Optional) Displays the size of the logging events buffer (in bytes), the percentage of the buffer that is occupied by alarm-event records, capacity threshold for reporting alarms, total number of records in the buffer, and severity filter, if any.

Step 2 

configure

Example:

RP/0/RSP0/CPU0:router# configure

Enters global configuration mode.

Step 3 

logging events buffer-size bytes

Example:

RP/0/RSP0/CPU0:router(config)# logging events buffer-size 50000

Specifies the size of the alarm record buffer.

In this example, the buffer size is set to 50000 bytes.

Step 4 

logging events threshold percent

Example:

RP/0/RSP0/CPU0:router(config)# logging events threshold 85

Specifies the percentage of the logging events buffer that must be filled before the alarm logger generates a threshold-crossing alarm.

In this example, the alarm logger generates a
threshold-crossing alarm notification when the event buffer reaches 85 percent of capacity.

Step 5 

logging events level severity

Example:

RP/0/RSP0/CPU0:router(config)# logging events level warnings

Sets the severity level that determines which logging events are displayed. (See Table 1 under the "Alarm Severity Level and Filtering" section for a list of the severity levels.)

Keyword options are as follows: emergencies, alerts, critical, errors, warnings, notifications, and informational.

In this example, messages with a warning (Level 4) severity or greater are written to the alarm log. Messages of a lesser severity (notifications and informational messages) are not recorded.

Step 6 

end

or

commit

Example:

RP/0/RSP0/CPU0:router(config)# end

or

RP/0/RSP0/CPU0:router(config)# commit

Saves configuration changes.

When you issue the end command, the system prompts you to commit changes:

Uncommitted changes found, commit them before 
exiting(yes/no/cancel)? 
[cancel]:
 
        

Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode.

Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes.

Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.

Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Step 7 

show logging events info

Example:

RP/0/RSP0/CPU0:router# show logging events info

(Optional) Displays the size of the logging events buffer (in bytes), percentage of the buffer that is occupied by alarm-event records, capacity threshold for reporting alarms, total number of records in the buffer, and severity filter, if any.

This command is used to verify that all settings have been modified and that the changes have been accepted by the system.


Modifying Logging Correlator Buffer Settings

This task explains how to modify the logging correlator buffer settings.

The size of the logging correlator buffer can be adjusted to accommodate the anticipated volume of incoming correlated messages. Records can be removed from the buffer by correlation ID, or the buffer can be cleared of all records.

SUMMARY STEPS

1. configure

2. logging correlator buffer-size bytes

3. exit

4. show logging correlator info

5. clear logging correlator delete correlation-id

6. clear logging correlator delete all-in-buffer

7. show logging correlator buffer {all-in-buffer [ruletype [nonstateful | stateful]] | [rulesource [internal | user]] | rule-name correlation-rule1...correlation-rule14 | correlationID correlation-id1..correlation-id14}

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

configure

Example:

RP/0/RSP0/CPU0:router# configure

Enters global configuration mode.

Step 2 

logging correlator buffer-size bytes

Example:

RP/0/RSP0/CPU0:router(config)# logging correlator buffer-size 100000

Specifies the size of the logging correlator buffer.

In this example, the size of the logging correlator buffer is set to 100,000 bytes.

Step 3 

exit

Example:

RP/0/RSP0/CPU0:router(config)# exit

Exits global configuration mode and returns the router to EXEC mode.

Step 4 

show logging correlator info

Example:

RP/0/RSP0/CPU0:router# show logging correlator info

(Optional) Displays information about the size of the logging correlator buffer and percentage of the buffer occupied by correlated messages

Step 5 

clear logging correlator delete correlation-id

Example:

RP/0/RSP0/CPU0:router# clear logging correlator delete 48 49 50

(Optional) Removes a particular correlated event record or records from the logging correlator buffer.

A range of correlation IDs can also be specified for removal (up to 32 correlation IDs, separated by a space).

Step 6 

clear logging correlator delete all-in-buffer

Example:

RP/0/RSP0/CPU0:router# clear logging correlator delete all-in-buffer

(Optional) Clears all correlated event messages from the logging correlator buffer.

Step 7 

show logging correlator buffer {all-in-buffer [ruletype [nonstateful | stateful]] | [rulesource [internal | user]] | rule-name correlation-rule1...correlation-rule14 | correlationID correlation-id1..correlation-id14}

Example:

RP/0/RSP0/CPU0:router# show logging correlator buffer all-in-buffer

(Optional) Displays the contents of the correlated event record.

Use this step to verify that records for particular correlation IDs have been removed from the correlated event log.


Displaying Alarms by Severity and Severity Range

This task explains how to display alarms by severity and severity range.

Alarms can be displayed according to severity level or a range of severity levels. Severity levels and their respective system conditions are listed in Table 1 under the "Alarm Severity Level and Filtering" section.


Note The commands can be entered in any order.


SUMMARY STEPS

1. show logging events buffer severity-lo-limit severity

2. show logging events buffer severity-hi-limit severity

3. show logging events buffer severity-hi-limit severity severity-lo-limit severity

4. show logging events buffer severity-hi-limit severity severity-lo-limit severity timestamp-lo-limit hh:mm:ss [month] [day] [year]

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

show logging events buffer severity-lo-limit severity

Example:

RP/0/RSP0/CPU0:router# show logging events buffer severity-lo-limit notifications

(Optional) Displays logging events with a severity at or below the numeric value of the specified severity level.

In this example, alarms with a severity of notifications (severity of 5) or lower are displayed. Informational (severity of 6) messages are omitted.

Note Use the severity-lo-limit keyword and the severity argument to specify the severity level description, not the numeric value assigned to that severity level.

Step 2 

show logging events buffer severity-hi-limit severity

Example:

RP/0/RSP0/CPU0:router# show logging events buffer severity-hi-limit critical

(Optional) Displays logging events with a severity at or above the numeric value specified severity level.

In this example, alarms with a severity of critical (severity of 2) or greater are displayed. Alerts (severity of 1) and emergencies (severity of 0) are omitted.

Note Use the severity-hi-limit keyword and the severity argument to specify the severity level description, not the numeric value assigned to that severity level.

Step 3 

show logging events buffer severity-hi-limit severity severity-lo-limit severity

Example:

RP/0/RSP0/CPU0:router# show logging events buffer severity-hi-limit alerts severity-lo-limit critical

(Optional) Displays logging events within a severity range.

In this example, alarms with a severity of critical (severity of 2) and alerts (severity of 1) are displayed. All other event severities are omitted.

Step 4 

show logging events buffer severity-hi-limit severity severity-lo-limit severity timestamp-lo-limit hh:mm:ss [month] [day] [year]

Example:

RP/0/RSP0/CPU0:router# show logging events buffer severity-lo-limit warnings severity-hi-limit critical timestamp-lo-limit 22:00:00 may 07 04

(Optional) Displays logging events occurring after the specified time stamp and within a severity range. The month, day, and year arguments default to the current month, date, and year, if not specified.

In this example, alarms with a severity of warnings (severity of 4), errors (severity of 3), and critical (severity of 2) that occur after 22:00:00 on May 7, 2004 are displayed. All other messages occurring before the time stamp are omitted.


Displaying Alarms According to a Time Stamp Range

Alarms can be displayed according to a time stamp range. Specifying a specific beginning and endpoint can be useful in isolating alarms occurring during a particular known system event.

This task explains how to display alarms according to a time stamp range.


Note The commands can be entered in any order.


SUMMARY STEPS

1. show logging events buffer timestamp-lo-limit hh:mm:ss [month] [day] [year]

2. show logging events buffer timestamp-hi-limit hh:mm:ss [month] [day] [year]

3. show logging events buffer timestamp-hi-limit hh:mm:ss [month] [day] [year] timestamp-lo-limit hh:mm:ss [month] [day] [year]

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

show logging events buffer timestamp-lo-limit hh:mm:ss [month] [day] [year]

Example:

RP/0/RSP0/CPU0:router# show logging events buffer timestamp-lo-limit 21:28:00 april 18 04

(Optional) Displays logging events with a time stamp after the specified time and date.

The month, day, and year arguments default to the current month, date, and year if not specified.

The sample output displays events logged after 21:28:00 on April 18, 2004.

Step 2 

show logging events buffer timestamp-hi-limit hh:mm:ss [month] [day] [year]

Example:

RP/0/RSP0/CPU0:router# show logging events buffer timestamp-hi-limit 21:28:03 april 18 04

(Optional) Displays logging events with a time stamp before the specified time and date.

The month, day, and year arguments default to the current month, date, and year if not specified.

The sample output displays events logged before 21:28:03 on April 18, 2004.

Step 3 

show logging events buffer timestamp-hi-limit hh:mm:ss [month] [day] [year]

timestamp-lo-limit hh:mm:ss [month] [day] [year]

Example:

RP/0/RSP0/CPU0:router# show logging events buffer timestamp-hi-limit 21:28:00 april 18 04 timestamp-lo-limit 21:16:00 april 18 03

(Optional) Displays logging events with a time stamp after and before the specified time and date.

The month, day, and year arguments default to the current month, day, and year if not specified.

The sample output displays events logged after 21:16:00 on April 18, 2003 and before 21:28:00 on April 18, 2004.


Displaying Alarms According to Message Group and Message Code

This task explains how to display alarms in the logging events buffer according to message code and message group.

Displaying alarms by message group and message code can be useful in isolating related events.


Note The commands can be entered in any order.


SUMMARY STEPS

1. show logging events buffer group message-group

2. show logging events buffer message message-code

3. show logging events buffer group message-group message message-code

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

show logging events buffer group message-group

Example:

RP/0/RSP0/CPU0:router# show logging events buffer group SONET

(Optional) Displays logging events matching the specified message group.

In this example, all events that contain the message group SONET are displayed.

Step 2 

show logging events buffer message message-code

Example:

RP/0/RSP0/CPU0:router# show logging events buffer message ALARM

(Optional) Displays logging events matching the specified message code.

In this example, all events that contain the message code ALARM are displayed.

Step 3 

show logging events buffer group message-group message message-code

Example:

RP/0/RSP0/CPU0:router# show logging events buffer group SONET message ALARM

(Optional) Displays logging events matching the specified message group and message code.

In this example, all events that contain the message group SONET and message code ALARM are displayed.


Displaying Alarms According to a First and Last Range

This task explains how to display alarms according to a range of the first and last alarms in the logging events buffer.

Alarms can be displayed according to a range, beginning with the first or last alarm in the logging events buffer.


Note The commands can be entered in any order.


SUMMARY STEPS

1. show logging events buffer first event-count

2. show logging events buffer last event-count

3. show logging events buffer first event-count last event-count

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

show logging events buffer first event-count

Example:

RP/0/RSP0/CPU0:router# show logging events buffer first 15

(Optional) Displays logging events beginning with the first event in the logging events buffer.

For the event-count argument, enter the number of events to be displayed.

In this example, the first 15 events in the logging events buffer are displayed.

Step 2 

show logging events buffer last event-count

Example:

RP/0/RSP0/CPU0:router# show logging events buffer last 20

(Optional) Displays logging events beginning with the last event in the logging events buffer.

For the event-count argument, enter the number of events to be displayed.

In this example, the last 20 events in the logging events buffer are displayed.

Step 3 

show logging events buffer first event-count last event-count

Example:

RP/0/RSP0/CPU0:router# show logging events buffer first 20 last 20

(Optional) Displays the first and last events in the logging events buffer.

For the event-count argument, enter the number of events to be displayed.

In this example, both the first 20 and last 20 events in the logging events buffer are displayed.


Displaying Alarms by Location

This task explains how to display alarms by location.


Note The commands can be entered in any order.


SUMMARY STEPS

1. show logging events buffer location node-id

2. show logging events buffer location node-id event-hi-limit event-id event-lo-limit event-id

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

show logging events buffer location node-id

Example:

RP/0/RSP0/CPU0:router# show logging events buffer 0/2/CPU0

(Optional) Isolates the occurrence of the range of event IDs to a particular node.

The location of the node is specified in the format rack/slot/module.

Step 2 

show logging events buffer location node-id event-hi-limit event-id event-lo-limit event-id

Example:

RP/0/RSP0/CPU0:router# show logging events buffer location 0/2/CPU0 event-hi-limit 100 event-lo-limit 1

(Optional) Isolates the occurrence of the range of event IDs to a particular node and narrows the range by specifying a high and low limit of event IDs to be displayed.

The location of the node is specified in the format rack/slot/module.


Displaying Alarms by Event Record ID

This task explains how to display alarms by event record ID.


Note The commands can be entered in any order.


SUMMARY STEPS

1. show logging events buffer all-in-buffer

2. show logging events buffer event-hi-limit event-id event-lo-limit event-id

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

show logging events buffer all-in-buffer

Example:

RP/0/RSP0/CPU0:router# show logging events buffer all-in-buffer

(Optional) Displays all messages in the logging events buffer.


Caution Depending on the alarm severity settings, use of this command can create a large amount of output.

Step 2 

show logging events buffer event-hi-limit event-id event-lo-limit event-id

Example:

RP/0/RSP0/CPU0:router# show logging events buffer event-hi-limit 100 event-lo-limit 1

(Optional) Narrows the range by specifying a high and low limit of event IDs to be displayed.


Displaying the Logging Correlation Buffer Size, Messages, and Rules

This task explains how to display the logging correlation buffer size, messages in the logging correlation buffer, and correlation rules.


Note The commands can be entered in any order.


SUMMARY STEPS

1. show logging correlator info

2. show logging correlator buffer all-in-buffer

3. show logging correlator buffer correlationID correlation-id

4. show logging correlator buffer rule-name correlation-rule

5. show logging correlator rule all

6. show logging correlator rule correlation-rule

7. show logging correlator ruleset all

8. show logging correlator ruleset ruleset-name

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

show logging correlator info

Example:

RP/0/RSP0/CPU0:router# show logging correlator info

(Optional) Displays the size of the logging correlation buffer (in bytes) and the percentage occupied by correlated messages.

Step 2 

show logging correlator buffer all-in-buffer

Example:

RP/0/RSP0/CPU0:router# show logging correlator buffer all-in-buffer

(Optional) Displays all messages in the logging correlation buffer.

Step 3 

show logging correlator buffer correlationID correlation-id

Example:

RP/0/RSP0/CPU0:router# show logging correlator buffer correlationID 37

(Optional) Displays specific messages matching a particular correlation ID in the correlation buffer.

Step 4 

show logging correlator buffer rule-name correlation-rule

Example:

RP/0/RSP0/CPU0:router# show logging correlator buffer rule-name rule7

(Optional) Displays specific messages matching a particular rule in the correlation buffer.

Step 5 

show logging correlator rule all

Example:

RP/0/RSP0/CPU0:router# show logging correlator rule all

(Optional) Displays all defined correlation rules.

Step 6 

show logging correlator rule correlation-rule

Example:

RP/0/RSP0/CPU0:router# show logging correlator rule rule7

(Optional) Displays the specified correlation rule.

Step 7 

show logging correlator ruleset all

Example:

RP/0/RSP0/CPU0:router# show logging correlator ruleset all

(Optional) Displays all defined correlation rule sets.

Step 8 

show logging correlator ruleset ruleset-name

Example:

RP/0/RSP0/CPU0:router# show logging correlator ruleset ruleset_static

(Optional) Displays the specified correlation rule set.


Clearing Alarm Event Records and Resetting Bistate Alarms

This task explains how to clear alarm event records and bistate alarms.

Unnecessary and obsolete messages can be cleared to reduce the size of the event logging buffer and make it more searchable, and thus more navigable.

The filtering capabilities available for clearing events in the logging events buffer (with the clear logging events delete command) are also available for displaying events in the logging events buffer (with the show logging events buffer command).


Note The commands can be entered in any order.


SUMMARY STEPS

1. show logging events buffer all-in-buffer

2. clear logging events delete timestamp-lo-limit hh:mm:ss [month] [day] [year]

3. clear logging events delete event-hi-limit severity event-lo-limit severity

4. clear logging events delete location node-id

5. clear logging events delete first event-count

6. clear logging events delete last event-count

7. clear logging events delete message message-code

8. clear logging events delete group message-group

9. clear logging events reset all-in-buffer

10. show logging events buffer all-in-buffer

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

show logging events buffer all-in-buffer

Example:

RP/0/RSP0/CPU0:router# show logging events buffer all-in-buffer

(Optional) Displays all messages in the logging events buffer.

Step 2 

clear logging events delete timestamp-lo-limit hh:mm:ss [month] [day] [year]

Example:

RP/0/RSP0/CPU0:router# clear logging events delete timestamp-lo-limit 20:00:00 april 01 2004

(Optional) Deletes logging events occurring before the specified time and date from the logging events buffer.

The month, day, and year arguments default to the current month, day, and year if not specified.

In this example, all events occurring before April 1, 2004 are removed.

Step 3 

clear logging events delete event-hi-limit severity event-lo-limit severity

Example:

RP/0/RSP0/CPU0:router# clear logging events delete event-hi-limit warnings event-lo-limit informational

(Optional) Deletes logging events within a range of severity levels for logging alarm messages.

In this example, all events with a severity level of warnings, notifications, and informational are deleted.

Step 4 

clear logging events delete location node-id

Example:

RP/0/RSP0/CPU0:router# clear logging events delete location 0/2/CPU0

(Optional) Deletes logging events from the logging events that have occurred on a particular node.

The location of the node is specified in the format rack/slot/module.

Step 5 

clear logging events delete first event-count

Example:

RP/0/RSP0/CPU0:router# clear logging events delete first 10

(Optional) Deletes logging events beginning with the first event in the logging events buffer.

In this example, the first 10 events in the logging events buffer are cleared.

Step 6 

clear logging events delete last event-count

Example:

RP/0/RSP0/CPU0:router# clear logging events delete last 20

(Optional) Deletes logging events beginning with the last event in the logging events buffer.

In this example, the last 20 events in the logging events buffer are cleared.

Step 7 

clear logging events delete message message-code

Example:

RP/0/RSP0/CPU0:router# clear logging events delete message sys

(Optional) Deletes logging events that contain the specified message code.

In this example, all events that contain the message code SYS are deleted from the logging events buffer.

Step 8 

clear logging events delete group message-group

Example:

RP/0/RSP0/CPU0:router# clear logging events delete group config_i

(Optional) Deletes logging events that contain the specified message group.

In this example, all events that contain the message group CONFIG_I are deleted from the logging events buffer.

Step 9 

clear logging events reset all-in-buffer

Example:

RP/0/RSP0/CPU0:router# clear logging events reset all-in-buffer

(Optional) Clears all bistate alarms in the SET state from the logging events buffer.

Step 10 

show logging events buffer all-in-buffer

Example:

RP/0/RSP0/CPU0:router# show logging events buffer all-in-buffer

(Optional) Displays all messages in the logging events buffer.


Configuration Examples for Alarm Management and Logging Correlation

This section provides the following configuration examples:

Increasing the Severity Level for Alarm Filtering to Display Fewer Events and Modifying the Alarm Buffer Size and Capacity Threshold: Example

Configuring a Nonstateful Correlation Rule to Permanently Suppress Node Status Messages: Example

Configuring a Stateful Correlation Rule for LINK UPDOWN and SONET ALARM Alarms: Example

Increasing the Severity Level for Alarm Filtering to Display Fewer Events and Modifying the Alarm Buffer Size and Capacity Threshold: Example

The following configuration example shows how to set the capacity threshold to 90 percent, to reduce the size of the logging events buffer to 10,000 bytes from the default, and to increase the severity level to errors:

!
logging events threshold 90
logging events buffer-size 10000
logging events level errors
!

Increasing the severity level to errors reduces the number of alarms that are displayed in the logging events buffer, because only alarms with a severity of errors or higher are displayed. Increasing the threshold capacity to 90 percent reduces the time interval between the threshold crossing and wraparound events; the logging events buffer thus does not generate a threshold-crossing alarm until it reaches 90 percent capacity. Reducing the size of the logging events buffer to 10,000 bytes decreases the number of alarms that are displayed in the logging events buffer and reduces the memory requirements for the component.

Configuring a Nonstateful Correlation Rule to Permanently Suppress Node Status Messages: Example

The following example shows how to configure a nonstateful correlation rule to permanently suppress node status messages:

logging correlator rule node_status type nonstateful
 
   
timeout 4000 
 
   
  rootcause PLATFORM INVMGR NODE_STATE_CHANGE
 
   
  nonrootcause
 
   
    alarm PLATFORM SYSLDR LC_ENABLED
 
   
    alarm PLATFORM ALPHA_DISPLAY CHANGE
 
   
  !
 
   
!
 
   
logging correlator apply rule node_status
 
   
  all-of-router
 
   
!
 
   
 
   

In this example, three similar messages are identified as forwarded to the syslog process simultaneously after a card boots:

PLATFORM-INVMGR-6-NODE_STATE_CHANGE : Node: 0/1/CPU0, state: IOS XR RUN

PLATFORM-SYSLDR-5-LC_ENABLED : LC in slot 1 is now running IOX

PLATFORM-ALPHA_DISPLAY-6-CHANGE : Alpha display on node 0/1/CPU0 changed to IOX RUN in state default

These messages are similar. To see only one message appear in the logs, one of the messages is designated as the root cause message (the one that appears in the logs), and the other messages are considered non-root-cause messages.

The root-cause message is typically the one that arrives earliest, but that is not a requirement.

logging correlator rule node_status type nonstateful
 
   
  timeout 4000 
 
   
  rootcause PLATFORM INVMGR NODE_STATE_CHANGE
 
   
  nonrootcause
 
   
    alarm PLATFORM SYSLDR LC_ENABLED
 
   
    alarm PLATFORM ALPHA_DISPLAY CHANGE
 
   
  !
 
   
!
 
   
 
   

In this example, the correlation rule named node_status is configured to correlate the PLATFORM INVMGR NODE_STATE_CHANGE alarm (the root-cause message) with the PLATFORM SYSLDR LC_ENABLED and PLATFORM ALPHA_DISPLAY CHANGE alarms. The updown correlation rule is applied to the entire router.

logging correlator apply rule node_status
 
   
  all-of-router
 
   
!
 
   
 
   

After a card boots and sends these messages:

PLATFORM-INVMGR-6-NODE_STATE_CHANGE : Node: 0/1/CPU0, state: IOS XR RUN

PLATFORM-SYSLDR-5-LC_ENABLED : LC in slot 1 is now running IOX

PLATFORM-ALPHA_DISPLAY-6-CHANGE : Alpha display on node 0/1/CPU0 changed to IOX RUN in state default

the correlator forwards the PLATFORM-INVMGR-6-NODE_STATE_CHANGE message to the syslog process, while the remaining two messages are held in the logging correlator buffer.

In this example, the show sample output from the show logging events buffer all-in-buffer command displays the alarms stored in the logging events buffer after the 4-second time period expires for the node_status correlation rule:

RP/0/RSP0/CPU0:router# show logging events buffer all-in-buffer
 
   
#ID :C_id:Source :Time :%CATEGORY-GROUP-SEVERITY-MESSAGECODE: Text
 
   
#76 :12  :RP/0/0/CPU0:Aug  2 22:32:43 : invmgr[194]: 
 
   
 
   
%PLATFORM-INVMGR-6-NODE_STATE_CHANGE : Node: 0/1/CPU0, state: IOS XR RUN
 
   

The show logging correlator buffer correlation ID command generates the following output after the one minute interval expires. The output displays the alarms assigned correlation ID 12 in the logging correlator buffer.

RP/0/RSP0/CPU0:router# show logging correlator buffer correlationID 46
 
   
#C_id.id:Rule Name:Source :Time : Text
 
   
#12.1 :nodestatus:RP/0/0/CPU0:Aug  2 22:32:43 : invmgr[194]: 
%PLATFORM-INVMGR-6-NODE_STATE_CHANGE : Node: 0/1/CPU0, state: IOS XR RUN
#12.2 :nodestatus:RP/0/0/CPU0:Aug  2 22:32:43 : sysldr[336]: %PLATFORM-SYSLDR-5-LC_ENABLED 
: LC in slot 1 is now running IOX
#12.3 :nodestatus:RP/0/0/CPU0:Aug  2 22:32:44 : alphadisplay[102]: 
%PLATFORM-ALPHA_DISPLAY-6-CHANGE : Alpha display on node 0/1/CPU0 changed to IOX RUN  in 
state default
 
   

Because this rule was defined as nonstateful, these messages are held in the buffer indefinitely.

Configuring a Stateful Correlation Rule for LINK UPDOWN and SONET ALARM Alarms: Example

The following example shows how to configure a correlation rule for the LINK UPDOWN and SONET ALARM messages:

!
logging correlator rule updown type stateful
 
   
  timeout 10000 
 
   
  rootcause PKT_INFRA LINK UPDOWN 
 
   
  nonrootcause
 
   
    alarm L2 SONET ALARM
 
   
  !
 
   
!
 
   
logging correlator apply rule updown 
 
   
  all-of-router
 
   
!
 
   

In this example, suppose that two routers are connected. When the correlator receives a root-cause message, the correlator sends it directly to the syslog process. Subsequent PKT_INFRA-LINK- UPDOWN or L2-SONET-ALARM messages matching the rule are considered leaf messages and are stored in the logging correlator buffer. If, for any reason, a leaf message (such as the L2-SONET-ALARM alarm in this example) is received first, the correlator does not send it to the logging events buffer immediately; the correlator, instead, waits until the timeout interval expires. After the timeout, if the root message is never received, all messages in the logging correlator buffer received during the timeout interval are forwarded to the syslog process.

In this example, the correlation rule named updown is configured to correlate the PKT_INFRA-LINK-UPDOWN alarm (the root message) and L2-SONET-ALARM alarms (leaf messages associated with PKT_INFRA-LINK-UPDOWN alarms).

logging correlator rule updown type stateful
 
   
  timeout 10000 
 
   
  rootcause PKT_INFRA LINK UPDOWN 
 
   
  nonrootcause 
 
   
    alarm L2 SONET ALARM
 
   
In this example, the updown correlation rule is applied to the entire router:
 
   
logging correlator apply rule updown 
 
   
  all-of-router
 
   

The following example shows sample output from the show logging events buffer all-in-buffer command. The output displays the alarms stored in the logging events buffer after the one minute time period expires for the updown correlation rule configured:

RP/0/RSP0/CPU0:router# show logging events buffer all-in-buffer
 
   
#ID :C_id:Source :Time :%CATEGORY-GROUP-SEVERITY-MESSAGECODE: Text
 
   
#144 :46 :LC/0/7/CPU0:Jan 30 16:35:39 2004:ifmgr[130]: %PKT_INFRA-LINK-3-UPDOWN :
 
   

Note Only the first LINK UPDOWN root message is forwarded to the syslog process during the timeout interval.


The following example shows output from the show logging correlator buffer correlationID command generated after the one-minute interval expires. The output displays the alarms assigned correlation ID 46 in the logging correlator buffer. In the example, the PKT_INFRA-LINK-UPDOWN root-cause message and L2-SONET-ALARM leaf messages generated during the timeout interval assigned correlation ID 46 are displayed:

 
   
RP/0/RSP0/CPU0:router# show logging correlator buffer correlationID 46
 
   
#C_id.id:Rule Name:Source :Time : Text
 
   
#46.1 :updown :LC/0/7/CPU0:Jan 30 16:35:39 2004:ifmgr[130]: %PKT_INFRA-LINK-3-UPDOWN :
 
   
#46.2 :updown :LC/0/7/CPU0:Jan 30 16:35:41 2004:DI_Partner[50]: %L2-SONET-4-ALARM :
 
   
SONET0_7_0_0: SLOS
 
   

Note The subsequent PKT_INFRA-LINK-UPDOWN and L2-SONET-ALARM leaf messages generated during the timeout interval remain in the logging correlator buffer because they are leaf messages.


The following example shows output from the show logging correlator buffer correlationID command. The output displays the alarms assigned to correlation IDs 46 and 47, the correlation IDs associated with the PKT_INFRA-LINK-UPDOWN and L2-SONET-ALARM root-cause messages:

 
   
RP/0/RSP0/CPU0:router# show logging correlator buffer correlationID 46
 
   
NO records matching query found
 
   
 
   

Additional References

The following sections provide references related to implementing and monitoring alarm logs and logging correlation on Cisco ASR 9000 Series Router.

Related Documents

Related Topic
Document Title

Alarm and logging correlation commands

Alarm Management and Logging Correlation Commands on Cisco ASR 9000 Series Router module in the Cisco ASR 9000 Series Aggregation Services Router System Monitoring Command Reference

Logging services commands

Logging Services Commands Cisco ASR 9000 Series Router module in the Cisco ASR 9000 Series Aggregation Services Router System Monitoring Command Reference

Onboard Failure Logging (OBFL) configuration tasks

Implementing Logging Services on Cisco ASR 9000 Series Aggregation Services Router module in the Cisco ASR 9000 Series Aggregation Services Router System Monitoring Configuration Guide

Onboard Failure Logging (OBFL) commands

Onboard Failure Logging Commands on Cisco ASR 9000 Series Router module in the Cisco ASR 9000 Series Aggregation Services Router System Monitoring Command Reference

Cisco IOS XR XML API material

Cisco ASR 9000 Series Aggregation Services Router XML API Guide

Cisco IOS XR getting started material

Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide

Information about user groups and task IDs

Configuring AAA Services on Cisco ASR 9000 Series Aggregation Services Router module in the Cisco ASR 9000 Series Aggregation Services Router System Security Configuration Guide


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