Config logging on which cisco IOS?

Logging is a critical part of any network administrator’s toolkit. Logging is the process of capturing and recording events that occur on a network. It provides an audit trail of all activity and helps administrators troubleshoot issues, detect security breaches, and track performance.

Cisco IOS is a popular operating system used to configure and manage Cisco routers and switches. Cisco IOS includes a comprehensive logging system to capture events on the network. Administrators can use logging to track user activity, detect security issues, troubleshoot network problems, and monitor performance.

In this article, we’ll discuss how to configure logging on Cisco IOS. We’ll explain the types of logging available, how to enable logging, and how to view and analyze log messages.

Types of Logging

Cisco IOS supports several types of logging, including system logging (syslog), debugging, trace logging, and verbose logging.

System Logging (Syslog): System logging captures events generated by the IOS system and sends them to a syslog server for analysis. System logging is enabled by default and can be configured to send messages to a syslog server.

Debugging: Debugging captures detailed information about network activity and can be used to troubleshoot network problems. Debugging is disabled by default and should only be enabled when necessary as it can generate a large amount of data.

Trace Logging: Trace logging captures detailed information about packets sent and received on the network. It can be used to troubleshoot routing problems and detect security issues. Trace logging is disabled by default and should only be enabled when necessary as it can generate a large amount of data.

Verbose Logging: Verbose logging captures detailed information about events on the network. It can be used to track user activity and performance. Verbose logging is enabled by default, but can be disabled when necessary.

Configuring Logging

Logging can be configured using the following IOS commands:

Logging on: Enables system logging and sends messages to the syslog server.

Logging host: Configures the IP address of the syslog server.

Logging trap: Configures the level of detail in the messages sent to the syslog server.

Debugging: Enables debugging and specifies which type of debugging to enable.

Trace logging: Enables trace logging and specifies which type of trace logging to enable.

Verbose logging: Enables verbose logging.

Viewing and Analyzing Log Messages

Log messages can be viewed and analyzed using the show logging command. This command displays all of the log messages currently stored in the IOS buffer. Administrators can use this command to view and analyze log messages in order to troubleshoot network problems and detect security issues.

Conclusion

Logging is a critical part of any network administrator’s toolkit. Cisco IOS includes a comprehensive logging system to capture events on the network. This article discussed how to configure logging on Cisco IOS, the types of logging available, and how to view and analyze log messages. With the ability to capture and record events on the network, logging can be used to troubleshoot network problems, detect security issues, and track performance.