daviddavis

David Davis goes over the Cisco IOS commands you must know to manipulate files on your Cisco router flash, nvram, or other filesystems, allowing you to back up your configuration, upgrade your router, or just maintain the IOS file system.

You probably use Authentication, Authorization, and Accounting (AAA), in some form, every day. But what is AAA in terms of network security? David Davis tells you what you need to know about AAA and the basic configuration for it in the Cisco IOS.

David Davis explains how to configure EtherChannel to increase your bandwidth and provide redundancy on a Cisco network.

David Davis shows you how to view ACL statistics and, with the help of a new feature in the Cisco IOS, how you can view these usage statistics per interface and per direction.

The Cisco IOS actually offers 16 different privilege levels. David Davis discusses these different levels and introduces you to the main commands you’ll need to configure these privileges.

Becoming proficient with the Cisco IOS means learning some essential commands. This quick reference describes 10 commands you’ll need to rely on when handling various configuration and troubleshooting tasks.

David Davis introduces the Archive command in Cisco, which you can configure to log all commands on your router. If you need to back up to a previous configuration, or see what went wrong after a change, the Archive command will help you find your way.

While ICMP is required for IP network traffic redirection and pinging hosts on your LAN or WAN, ICMP can also pose a security concern. David Davis tells you about the basics of ICMP and how to filter it properly in the Cisco IOS.

David Davis describes the fundamentals of router security through a list of his top five best practices. He has also hand-picked resources that will give you further details on properly securing your routers.

Inventorying your routers’ serial numbers is an important activity that every network administrator needs to be able to do — both to keep track of what you have and to properly register for support and maintenance from Cisco Systems. How do you collect these numbers without physically going to each and every router in your organization? Here’s how to determine those serial numbers remotely.

Did you know your Cisco router could send you an e-mail? Until recently, I would have said that it wasn’t possible, but today, I’ll show you how to do it. And we won’t stop there: I’ll tell you where to find some other scripts that you can use on your Cisco router.

While you may not have a network as large or as critical as YouTube to manage, unexpected network downtime or lost network traffic is never a good thing. That’s why you should understand what a black hole route is, how it can help you — and how it could hurt you.