Tag Archive: Cisco
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
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
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
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
Implementing and Troubleshooting EtherChannel
Before we get into the technical topics, I’ll give a brief personal update, as I’ve been asked by a few people how close I am to test time. I’m happy to say that I’ve tentatively scheduled the written test for…
Read more
Implementing and Troubleshooting VLANs and Trunking
It’s been a few days since I had a chance to post anything. My daughter just turned 2 and we’ve been working hard cleaning and getting ready for a big birthday party for her this last weekend. It’s been nice…
Read more
Implementing and Troubleshooting Switch Administration and Layer 2 Protocols
We’ve made up a new word here at Hack and Tinker! That’s right, not only do you get to learn about exciting networking technologies here, you actually get to witness the birth of language. Could it possibly get more exciting…
Read more
Using Plink to log commands from your SSH/telnet devices
When it comes to monitoring a network, there are dozens of tools out there that an administrator can use to log information. However no amount of syslog or SNMP data can beat the detail of the commands you have at…
Read more
SECURE ALL THE SWITCHES! Part 2: DHCP Snooping
Welcome to our new SECURE ALL THE SWITCHES! series. We will be covering in-depth countermeasures that you can deploy in your network to help defend against network switch pwnage. Part 2: DHCP Snooping The Attack: In our Network Takedown series…
Read more