Tools, Tips and Reviews for Network Engineers
by Andy Salo Have you ever been in the data center, or out in some remote wiring closet, and realized you need a router config from your TFTP Server and can’t access it? Many people don’t want to leave a TFTP Server continually running on their network since it is not secure and it opens them [...]
Problem Diagnosis With Ping By Steve Waddington The two most used tools, and almost always the first used to diagnose a network problem are traceroute and ping. The results they return are however most often misunderstood or interpreted in a way that leads to an incorrect conclusion. Let’s take the ping utility specifically. The common [...]
Everyone remembers the original movie TRON where the character Flynn, played by Jeff Bridges, is sucked into the microscopic world of computer games. In the movie the villain was the Master Control Program or MCP who would take programs OFFLINE if they misbehaved. Switches have their own MCP (of sorts) which takes network switch ports [...]
Hot Standby Routing Protocol or HSRP, is a Cisco proprietary protocol that allows two or more routers to work together to represent a single IP address for a particular network. HSRP, as well as Virtual Route Redundancy Protocol (VRRP) are considered high-availability network services that allow for almost immediate fail over to a secondary interface [...]
Supported Cisco Commands Can Vary Depending on the Version of Software In Use.
It’s time to vent some frustration everybody!! If you have worked on Cisco devices for any length of time, or even if you have just started work with Cisco routers, you know that the Cisco command line interface can be a frustrating thing. The consistency of the syntax of a given command can vary significantly from platform [...]