Latest Posts
Using Cisco’s NBAR2 to Rate Limit Streaming Media on Your ISR Router
What do Netflix, Windows Updates, YouTube, Facebook, Instagram, and the Apple App Store have in common? They are all major drains on your business’ internet connection. While the knee-jerk reaction is to simply ban any site that drains your bandwidth,…
Read more
Fix for – Login Denied , unauthorized connection mechanism , contact your administrator – Cisco AnyConnect
The following error is one of the more annoying errors I have received when setting up Dynamic Access Policies. “login denied your environment does not meet the access criteria defined by your administrator” If you’ve ever seen this error before…
Read more
IPv6 for Fun and Profit
“Onions have layers, and Ogres have layers!” I don’t know why, but that’s one of my favorite scenes from Shrek. Of course, Networking has layers as well – and we’ve come to the biggest and most important of them, from a…
Read more
Layer 2 WAN Technologies
Here we go – one last layer 2 topic before we cross the threshold into the heart of what the CCIE exam is really all about: Routing. It’s been mind-blowing to reflect back on how much I’ve learned putting together the content…
Read more
Chassis Virtualization
What’s better than having two high-performance core switches in your network environment? How about having just one! Wait a minute… that seems backwards, right? Well, certainly from a hardware redundancy standpoint, having more than one is better, but there are…
Read more
Implementing and Troubleshooting SPAN
Please let me first begin with some personal updates. First of all, I’ve chosen to move in a new direction in my career. That may come as a surprise to those of you who know me personally and know how…
Read more
Spanning-Tree Performance Enhancers
Welcome to our third and final post dedicated to the Spanning-Tree CCIE objectives. Since many of these features discussed are used to enhance and tune our STP environments, I’m going to bunch them all together and call them STP Performance…
Read more
Spanning-Tree “Flavors” (PVST+/Rapid-PVST/MST)
Wow. Just wow. I’ve made a career out of routing and switching. Yet, it’s absolutely mind-blowing to me how much of this stuff I’d either forgotten or simply never learned in the first place. That’s natural and expected of course……
Read more
HSRP With Two Routers and Two Diverse Internet Circuits
Redundancy is the name of the game when it comes to uptime in the computer networking field. We as networking professionals spend time tracking down our single points of failure and eliminating them one by one. However, one place we…
Read more
Spanning Tree Protocol Path Selection
“Spanning Tree Protocol” – Just the mere mention of such a massive topic in light of CCIE studies feels a little intimidating. I’m sure I don’t have to tell you, this is a very core concept. A VERY solid understanding…
Read more