Tools, Tips and Reviews for Network Engineers
TweetProblem 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 [...]
TweetEveryone 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 [...]
TweetHot 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 [...]
TweetHow to Configure SSH (Secure Shell) For Remote Login on a Cisco Router By Don R. Crawley Prior to the introduction of SSH in the Cisco IOS, the only remote login protocol was Telnet. Although quite functional, Telnet is a non-secure protocol in which the entire session, including authentication, is in clear text and thus [...]
Supported Cisco Commands Can Vary Depending on the Version of Software In Use.
TweetIt’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 [...]