Blog

Bruce Enders of Chesapeake NetCraftsmen recounts a story that demonstrates why configuration repositories and monitoring configuration changes are valuable.  A NetCraftsmen customer called on a Saturday morning to ask about [...]

There’s an interesting site, FAQ or contributing to the Powerpoint presentation on KCS is very useful in understanding how it can be used to improve the customer support process.  One [...]

Rick Burts (CCIE #4615) of Chesapeake NetCraftsmen told several of us about an interesting problem he recently encountered.  Here’s his description of the problem: This week I was called to [...]

I recently became aware of RFC 4821, Packetization Layer Path MTU Discovery, dated March 2007.  One of the problems with the traditional Path MTU discovery mechanism is that it relies [...]

Pete Welcher at Chesapeake NetCraftsmen (Optimal Routing Design, while studying for his CCDE test.  This feature has been around a while, having been added to Cisco IOS 12.0S, but I’ve [...]

Network World’s Tim Greene posted ACM paper on the algorithm says that it can reduce overhead by an order of magnitude. The key concept behind the algorithm is that it [...]

Cisco has launched a consolidated source for Enterprise Technical content. It is organized around Network Architectures, Technologies, and Vertical Industries. The Design Zone brings Cisco Validated Designs, legacy design guides and [...]

I’m doing my presentation titled Troubleshooting Converged VoIP and Data Networks at Interop New York on September 17 at 1:30pm.  The session title is Troubleshooting Converged Networks.  It has been [...]

This is an example of how to handle a tricky boolean expression with NAC Appliance rules. I'll lay out a scenario and focus on the rule creation. I'll cover the other aspects in future blog posts.

Some vendors are charging licensing fees for each processor or even each processor core in a server.  In an Netcordia to license our products based on device count.  The major [...]

Marty Adkins over at Netcraftsmen recently found an interesting network diagnostic tool: Applied Infrastructure blog under

Paris Traceroute is a new implementations of traceroute available that can infer multiple paths for Unix systems. More information is available at       http://www.paris-traceroute.net/