routerjockey

Best Practices and Securing Cisco IOS

Everyone has different views on hardening IOS, and while I do not claim to be an expert, these are the practices that I commonly use when bringing up a new device. If you see …

IOS Embedded Packet Capture

Tired of setting up SPAN sessions? Need to do some packet analysis? Since IOS 12.4(20)T Cisco has made Embedded Packet Capture (EPC) available. EPC is a powerful troubleshooting …

Petition Cisco for Educational IOS Licensing

Greg Ferro of Etheralmind.com has started a petition asking Cisco to embrace those who pursue Cisco’s certifications a legal course of licensing without the cost of building a home …

More IOS Tips

Learning the particulars of Cisco IOS is one of the most valuable things a network engineer can do. These skills will be the basis of everything you do on the lab and on your …

Using the Cisco IOS Archive Command

The Cisco IOS archive command is not only very useful in keeping configuration archives, but it can also be used to log commands entered into the router, along with their user …

Using Regular Expressions on Cisco IOS

As a followup to my previous post on Regular Expression Basics, I wanted to give a few examples on using them on Cisco IOS. Obviously, with a topic as large as regular expressions, …

IOS ACL Resequencing

This is one of those tricks you wish you learned about 10 years ago, but never did. You know how easy it is to mess up a nice looking access list. You get one setup on the router, …

An Essential Alias for Forgetful Engineers Like Myself (updated)

How many times a day do you issue a show command from configuration mode ? If you’re anything like me, its enough to get annoying. Luckily Cisco has given us the ability to user …

Demystifying Cisco Config Register Bits

Ever accidentally set your config register to a random value that isn’t in the Cisco documentation? No? Neither have I, but one day I encountered someone on #cisco that had. So I …

Cisco IOS Tips and Tricks

So, I’m sure these have been posted almost on every networking blog under the sun, but who knows, right? Here are a few tips and tricks to help you move around the IOS a bit …

Cisco IOS Naming Conventions

As I started building this lab, I realized that I had to find a refresher course on the IOS naming conventions. They have gone through a number of revisions through the years, but …

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