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- TechRepublic Author Biography
David's Website is- http://www.HappyRouter.com - where you can find technical articles, videos, and forums!! David has been in the IT industry for 15 years. Currently, he manages a group of systems/network administrators for a privately owned retail company. David also does networking/systems consulting on a part-time basis. His certifications include:...- more about David Davis »
TechRepublic Resources
- Monitor Cisco routers and switches using the IOS environment command
- How do you know if your remote router and switches are being cooled properly? Are the fans working? David Davis tells you how to see the environmental status of your Cisco routers and switches and how to be alerted when there is a hardware problem. by David Davis
- Tags: monitor, cisco ios, cisco router, router, environment, power supply, status, snmp, cisco systems inc., hardware, temperature, david davis, routers & switches, networking, network technology
- Blog posts 2008-08-01
- Get to know the Cisco IOS Feature Navigator
- David Davis tells you how the Cisco IOS Feature Navigator can help you find the information you need, including what features your current IOS image has, the differences between two IOS images, and whether your router can support the latest IOS. by David Davis
- Tags: cisco ios, netscape navigator, cisco systems inc., feature, david davis
- Blog posts 2008-07-24
- SolutionBase: Does the Cisco Self-Defending Network really work?
- David Davis explains why the Cisco Self-Defending Network might be the right choice for your company. by David Davis
- Tags: security, network, cisco systems inc., david davis, csdn, figure b, network admission control, networking
- Blog posts 2008-07-23
- How to view Cisco IOS ACL statistics
- 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. by David Davis
- Tags: statistics, cisco ios, access control list, cisco systems inc., access control, david davis, ace
- Blog posts 2008-07-17
- Cisco administration 101: Monitor network traffic with NetFlow
- David Davis introduces you to NetFlow, a standard for network traffic analysis. He shows you how you can use it to see the utilization on a router -- as well as the traffic that's causing the utilization. by David Davis
- Tags: monitor, router, network, administration, network traffic, cisco systems inc., netflow, david davis, networking
- Blog posts 2008-07-16
- What you need to know about Cisco's new CCNA specializations
- Cisco's most popular certification is the Cisco Certified Network Associate CCNA. Recently, Cisco announced a number of new specialized CCNA certifications. What are these specializations, and should you be considering one? David Davis discusses each of these new certifications in more detail. by David Davis
- Tags: certification, ccna, specialization, cisco systems inc., david davis, quality, training and certification, business operations
- Blog posts 2008-07-10
- How to properly secure your Cisco router with passwords
- Some of the worst security breaches occur because people neglect basic security measures. David Davis discusses the importance of maintaining proper passwords on your router, explains the three modes for the Cisco IOS, and shows you how to configure the five main passwords that protect your network. by David Davis
- Tags: password, cisco router, router, mode, cisco systems inc., david davis, routers & switches, network technology, networking
- Blog posts 2008-06-26
- Understand the levels of privilege in the Cisco IOS
- 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. by David Davis
- Tags: cisco ios, password, router, command, cisco systems inc., exec, david davis, routers & switches, network technology, networking
- Blog posts 2008-06-20
- Cisco Administration 101: Understand the OSI model to become a better Cisco troubleshooter
- David Davis explains how the seven layers of the OSI Model can help you as a Cisco administrator. Get a brief overview of the OSI model and learn why it is more than just a textbook concept -- understanding it will help you every day of your career. by David...
- Tags: osi, certification, administrator, layer 3, network, administration, layer, cisco systems inc., david davis, acl, networking
- Blog posts 2008-06-20
- 10 commands you should master when working with the Cisco IOS
- 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. by David Davis
- Tags: cisco ios, router, command, ip, cisco systems inc., routers & switches, network technology, networking, david davis
- Blog posts 2008-06-13
- Troubleshoot Cisco routers and switches using the debug commands
- David Davis shows you how to get to the bottom of router and switch issues with Cisco's debug commands. Debug can give you a lot of detailed troubleshooting information, but watch out for the debug mistakes that can seriously affect your network. by David Davis
- Tags: cisco ios, cisco router, router, command, cisco systems inc., debug, router#, debug statement, david davis, routers & switches, network technology, networking
- Blog posts 2008-06-12
- What you need to know about Cisco IOS access-list filtering
- Let's face it, if you don't use Cisco IOS access lists ACL every day, they can be very painful to use. Why are ACLs so painful? Besides just being difficult to use, the penalty for mistake is huge. In one swift swoop, you could incorrectly permit malicious attackers onto your...
- Tags: cisco ios, router, network, traffic, ip, cisco systems inc., subnet, mask, acl, wildcard mask, routers & switches, network technology, networking, david davis
- Blog posts 2008-06-05
- Use the Cisco IOS archive command to archive your router's configuration
- Do you want to create archives of your configuration before every configuration change is made? What was the difference between the configuration you saved last year and the one you saved today? The archive command can help you answer these questions and more. Check it out. What is the...
- Tags: cisco ios, router, command, backup, configuration, cisco systems inc., routers & switches, network technology, networking, david davis
- Blog posts 2008-05-29
- How to perform a Cisco IOS warm upgrade and reload to minimize downtime
- Recently, I wanted to upgrade my test router to the latest IOS. I had read about the new Cisco IOS warm upgrade and warm reload features, and I took this opportunity to test them out. By using these features, you can minimize downtime for your end users when you have...
- Tags: cisco ios, router, downtime, cisco systems inc., routers & switches, network technology, networking, david davis
- Blog posts 2008-05-22
- Filter ICMP traffic in the Cisco IOS
- The Internet Control Message Protocol ICMP is not TCP and it's not UDP. However, ICMP is critical to the functionality of any IP network, such as your corporate network or the Internet. While ICMP is required for IP network traffic redirection and pinging hosts on your LAN or WAN, ICMP...
- Tags: cisco ios, router, network, traffic, cisco systems inc., icmp, internet control message protocol, internet, networking, david davis
- Blog posts 2008-05-15
- Use Multilink PPP to combine multiple circuits into a single circuit with a single router interface
- At my company, we initially started out with a single T1 for Internet access. That gave us 1.5Mb up and 1.5Mb down. Over time, we outgrew the 1.5Mb down as we added more users. We had to add more bandwidth; however, it was not cost effective to bring in a...
- Tags: ppp, router, t1, circuit, multilink ppp, networking, david davis
- Blog posts 2008-05-08
- Learn more about what you can do with the Cisco IOS router command
- If you have configured dynamic routing on a Cisco router you have used the router command, but perhaps you haven't really looked at all the options that it offers. In this article, learn about the Cisco IOS router command, what it is, and how it can help you. Static...
- Tags: cisco ios, router, open shortest path first, routing protocol, cisco systems inc., routers & switches, network technology, networking, david davis
- Blog posts 2008-05-01
- Learn to configure Cisco IOS NAT on a stick
- A well known NAT configuration is called "NAT on a stick." Besides having a funny name, NAT on a stick can be very useful to network administrators. In this article, learn what NAT on a stick is and how it can help you. What is Network Address Translation? ...
- Tags: cisco ios, router, network, stick, ip, network address translation, ip address, cisco systems inc., no., networking, david davis
- Blog posts 2008-04-24
- Run Linux on your Cisco router with Cisco's new AXP module
- Cisco has been talking about the "network as a platform" for a long time, but what does that actually mean, and what does the AXP network module have to do with it? What is the AXP? The Cisco Application eXtension Platform AXP is made up of a hardware...
- Tags: david davis
- Blog posts 2008-04-17
- Implement regular monitoring and improve Cisco router performance
- Do you know how your routers are performing? What could you do to improve performance? I'll try to answer those questions by giving you some tips on monitoring and improving your router performance. What is meant by router performance? What network admins actually mean when they talk about...
- Tags: cisco router, router, performance, monitoring, cisco systems inc., routers & switches, network technology, networking, david davis
- Blog posts 2008-04-10
