Tutorial

Is static port channel a good idea?

During my CCIE R&S studies (CCIE Routing and Switching v5.0 Official Cert Guide, Volume 1), I have discovered an unexpected behavior of the static...

Send WhatsApp alert during a network fault

A good network engineer must react quickly during a fault. On the market, there are several solutions to monitor the network malfunctions: HP Openview,...

Cisco VSS: Failure scenarios

In the last article, I explained how to configure the Cisco 6500 in VSS configuration, but how does the VSS reacts during a failure? There...

Cisco 6500 VSS configuration

The Cisco Catalyst 6500 Series Virtual Switching System (VSS) allows the clustering of two chassis together into a single, logical entity. This technology allows...

How to log everything with SecureCRT

Unlike my technical articles about configurations, protocols and so on, in this tutorial I will explain how to log automatically all SecureCRT sessions. For those...

Send Cisco commands via SNMP

In the article "How to save configurations using SNMP", I have explained how to get the Cisco configuration using SNMP. Now, I explain how to...

How to upgrade a Cisco stack

One of the task of a good Network engineer is update the Cisco IOS to avoid bugs and to have new features; but what is the correct...

Speed up your console

Generally to upgrade/downgrade an IOS, you use the classical ftp/tftp transfer from a laptop to a router/switch; unfortunately, there are some cases where this way is...

Dual Internet connections in active/standby mode without BGP

Suppose that your company has two independent Internet connections: the first used as main link and the second used ONLY in case of main...

Show interface in depth

In my opinion, a good network engineer must know the "show interface" in depth; indeed, this command is useful to...