Configuring And Viewing Crash Logs - Cisco ASR 5000 Series Administration Manual

System Logs
• From the console port: By default, the system automatically displays events over the console interface
This section provides instructions for viewing event logs using the CLI. These instructions assume that you
are at the root prompt for the Exec mode.
Step 1
Copy the active log memory buffer to the inactive log memory buffer.
When the active log memory buffer is copied to the inactive log memory buffer existing information in the inactive log
memory buffer is deleted.
Both active and inactive event log memory buffers can be viewed using the CLI in Exec mode. However, it is preferable
to view the inactive log in order to prevent any data from being over-written. The information from the active log buffer
can be copied to the inactive log buffer by entering the following command:
host_name
[local]
Step 2 View the logs by entering the following command:
host_name
[local]
A number of optional keywords/variables are available for the show logs command. Refer to the Exec Mode Show
Commands chapter in the Command Line Interface Reference for more information.

Configuring and Viewing Crash Logs

In the unlikely even of a software crash, the system stores information that could be useful in determining the
reason for the crash. This information can be maintained in system memory or it can be transferred and stored
on a network server.
The system supports the generation of the following two types of logs:
• Crash log: Crash logs record all possible information pertaining to a software crash (full core dump).
• Abridged crash log: Crash event records are automatically generated when a software crash occurs and
Crash Logging Architecture
The crash log is a persistent repository of crash event information. Each event is numbered and contains text
associated with a CPU (minicore), NPU or kernel crash. The logged events are recorded into fixed length
records and stored in /flash/crashlog2.
Whenever a crash occurs, the following crash information is stored:
1 The event record is stored in /flash/crashlog2 file (the crash log).
to a terminal provided that there is no CLI session active.
logs checkpoint
#
show logs
#
Due to their size, they can not be stored in system memory. Therefore, these logs are only generated if
the system is configured with a Universal Resource Locator (URL) pointing to a local device or a network
server where the log can be stored.
are stored in flash memory on management cards. The abridged crash log contains a list crash event
records along with associated dump files. This log allows you to view event records and dump files via
CLI commands.
Configuring and Viewing Crash Logs
ASR 5500 System Administration Guide, StarOS Release 21.4
183