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Just a reminder, the November 16, 2011 Cisco Mid-Atlantic User Group (C-MUG) session is themed "Bring Your Server Team to C-MUG". The  focus will be on how to set up and configure the Cisco UCS Server, but the session will also include Cisco UCS blade chassis and blades, blade switches,…

Best practice datacenter design architectures have changed — there are different and new datacenter designs now that can save you money. So why am I telling you this? Two reasons. First, I’ve [...]

I’ve been seeing some network problems lately, at sites where the problem was designing the VPC and routing mix correctly. Generally, there’s plenty of room to make a mistake, the [...]

Not all network engineers understand the impact of interface errors on TCP performance. Interface errors can cause a BIG impact, although it may not be intuitive at first glance. We recently pointed out some interfaces with extremely high errors to a customer. We mentioned that the links with the highest…

I’ve been seeing folks trying to use Cisco Nexus VPC port-channels, and it seems useful to blog about How VPC Works. Part of my goal here is to follow this [...]

This article is directed to CCIE candidates, especially R&S CCIE candidates. As I mentioned in my article on CCIE Lab Preparation and Soft Skills, I believe it is not enough for CCIE candidates to just prepare technically for the CCIE lab, I think you also need test taking skills and…

We’ve all encountered situations where an application is slow and the network gets blamed. I’ve been having some fun working with our Terry Slattery on consulting work to determine why a [...]

've always looked at percentage of interface errors as an indicator of which interfaces I should examine. What did I know? Not enough, as it turns out. I've been working with customers on application performance, as you might have guessed from the series of recent blogs on the topic of…

I thought I’d write a quick note relating to performance problems, and since it is Halloween when I’m writing this, the title “Performance That Goes Bump in the Night” seems [...]

I recently had a conversation about tools that I use that may not be what one would call "common knowledge". Basically, the discussion was around tools that may be handy for an engineer that works with Cisco Unified Communication and Collaboration solutions but that are not part of the standard…

Scenario: We have a CUCM cluster servicing disparate geographic locations and want to use the Local Route Group (LRG) feature for PSTN call routing.  We also want to ensure that [...]

I am delighted to announce that Chesapeake NetCraftsmen has achieved our third Cisco Advanced Architecture Specialization, the Advanced Borderless Betwork Architecture Specialization! Special thanks to integrated team members including David [...]