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Sunday 8/30/09  Updated Monday 8/31/09 and Monday 9/7/09 I’m attending VMWorld in San Francisco this week, August 31, 2009 to September 3, 2009. Purpose: to learn more about the business and [...]

Good network engineers know about TCP performance over Long, Fat Networks (LFNs – see RFC1323) and how to use bandwidth, delay, and window size to calculate the maximum throughput of [...]

Performance routing (PfR) is a newer Cisco technology that is beginning to make its way into many enterprise networks. It has become mainstream enough that Cisco is now including it on the new CCIE exams. So I thought an overview and explanation is in order. Let me start out by…

I’ve been working with several network Applied Infrastructure blog under

Recently I was working with a customer that wanted to ensure that remote sites that used SRST enabled routers had access to the same corporate Music On Hold (MoH) audio [...]

One of the best sessions I attended at CiscoLive this year was titled “BRKRST-3365, Unified HA Network Design: The Evolution of the Next Generation Network” by John Cavanaugh, Chris Cornwall, [...]

Have you ever used the OSI model to aid your troubleshooting?  I’ve been able to use it to help me isolate the causes of problems and focus my troubleshooting to [...]

In a previous article I discussed how I like to use Microsoft's LogParser utility to, well, parse Windows event logs on a Call Manager server.  For those that no longer run CM on a Windows server that article may not be incredibly useful.  Recently, I have had to update some…

Here is a recap of articles I posted in July to my blog at Netcordia: “Monitoring Critical Network Devices” discusses ways to configure a NMS to monitor your network devices [...]

(Updated 9/30/09) For a while I've been loosely tracking TCP/IP performance information. I'd like to share some information about this area. I claim some insight but freely admit I'm still learning. Motivation: It seems like over the last two years, a number of application WAN (MPLS VPN, etc.) performance issues…

A few months ago, Bill Bell wrote a blog titled “Cisco UC Application Upgrade – The CLI Method“.  His intent was to outline some issues he experienced with a few [...]

The UC team here at NetCraftsmen relies pretty heavy on virtualization to mock up various testing scenarios for customers.  A while ago, I mocked up a lab to simulate a [...]