It is not uncommon to be performing a software upgrade on a network appliance type of device and the operation fails. Hopefully, the failure doesn’t render the hardware useless and allows for a retry of the operation. However, there are times where an upgrade will fail and the device will no longer function. This article uses a specific example to carry you through steps that can be applied to any appliance like device.

Use a simple Linux virtual machine running in a player on your Windows desktop in order to use the awesome Unix program called expect. This will article will show you how to get started automating the login of Cisco devices by using expect.

The article will explain why interfaces show up in the Network and Sharing Center of Windows Vista/7/2008 as an Unidentified network and how to turn off the discovery function, so that they no longer are automatically classified. By turning off discover for each interface (as needed), you can eliminate the Unidentified Network all together.

Part I of the network design series for the fictitious company qwikPolicy, an insurance company that is being built from the ground up.

Part II of the network design series for the fictitious company qwikPolicy, an insurance company that is being built from the ground up.

This article will go through the process of compiling an entire program in C# that accomplishes logging into a Cisco IOS device via telnet and displays the running configuration.

Here is a wall chart for quick subnettting reference and an explanation of how the chart was created.

Xpressbits: Configure netflow to analyze traffic going through a router

Overview of building a system backup network along with answers to common design considerations.

This article explains how to use an old Cisco router as a replacement for the typical small office/home office gateway router.