Configure logging in Cisco IOS

Knowing how to properly use logging is a necessary skill for any network administrator, and the Cisco IOS offers many options for logging. Logging can use for fault notification, network forensics, and security auditing. Cisco routers log messages can handle…
Show module command

Show modules: To display the module status and information, use the show module command in user EXEC or privileged EXEC mode. This example shows how to display information for all modules on a Catalyst 6500 series switch that is configured…
Show running-config

Show running-config: To display the configuration information currently running on the terminal, use the show running-config EXEC command. This command replaces the write terminal command. Syntax Description: This command has no arguments or keywords. Command Mode: EXEC Usage Guidelines This…
How Private VLANs Work?

It’s simple to explain What Private VLAN is, but Cisco’s implemenation and configuration steps are a bit confusing – with all the “mappings” and “associations” stuff. Here we will talk about Private VLAN and how private VLANs work. Firstly, let’s…
How to Troubleshoot OSPF?

OSPF is one of our more complicated routing protocols, and it can be pretty intimidating, especially at first. But once you have mastered how to configure this Link State Protocol, the first thing you realize is that it is built…