David’s Cisco Networking Blog:


December 15, 2008  3:27 AM

What is ARP and how does it work in the Cisco IOS?

Posted by: David Davis
CCNA, Cisco, Networking

The Address Resolution Protocol, or ARP, is a critical protocol in your network infrastructure. What is ARP? It’s an Internet protocol used to map an IP address to a MAC Address. Usually ARP just "works" and you don't have to do anything about it. However, there are reasons that you may need to...

November 30, 2008  8:10 PM

Filter Web content with Cisco IOS routers

Posted by: David Davis
Cisco, Networking, Security

I recieved a ton of comments and positive reviews for my latest Cisco article: Filter Web content with Cisco IOS routers. In this article, I cover how you can use a...

November 30, 2008  2:18 PM

What is Route Table Profiling and How can it help you?

Posted by: David Davis
Cisco, Networking, Routing

Originally introduced as a hidden command in IOS 11, Route Table Profiling is now an officially supported command and can be very helpful to Cisco network Admins. With Route Table Profiling, you can monitor for fluxuations in the routing table, route flapping, and network outages, among other...

November 30, 2008  8:58 AM

FirePlotter shows real-time Internet traffic on Cisco PIX, ASA, and Fortinet

Posted by: David Davis
ASA, Networking, PIX, Security

I ran across this cool firewall tool called Fireplotter. It graphs and shows real-time Internet traffic going through your Cisco PIX, ASA, or Fortinet Firewall. You can use it to:

  • Find out why your internet connection seems to have slowed down
  • Identify unfamiliar...

November 29, 2008  6:58 PM

Add Cisco’s CCO Search Tools to your Web Browser

Posted by: David Davis
Cisco, Networking

Cisco is offering free Web Browser plug-ins to allow you to search their various sites and communities directly from your web browser. By using this tool, here is what you can search:

  • BugID Lookup Tool 
  • Command Lookup Tool 
  • Error Message Decoder...

November 29, 2008  6:11 PM

Windows Server 2008 Network Infrastructure video training course – New

Posted by: David Davis
Microsoft Windows, Networking, Videos, Windows Server 2008

Last week, Train Signal - the global leader in video training - released their Microsoft Windows 2008 Network Infrastructure training course. This course covers the Microsoft MCTS / MCITP certification exam 70-642. Taught by Ed Liberman, this 14 hour video training course also includes the 70-642...

November 18, 2008  10:00 PM

Cisco and Microsoft roll out Windows on WAAS Networking Appliance

Posted by: David Davis
Cisco, Networking

You don't see a lot of Cisco and Microsoft "joint announcements". In this case, Microsoft and Cisco jointly announced a new networking appliance - Windows on WAAS. The "WAAS" is Cisco's Wide Area Application Services initiative (

November 18, 2008  8:30 PM

Read my latest article- Use SNMP with VMware ESX to monitor server statistics

Posted by: David Davis
Network Management, Virtualization, VMware

In my latest SearchVMware.com article, I show you, step by step, how to enable and configure SNMP in VMware ESX and ESXi Server. From there, I move on to demonstrating a few different applications that can be used to monitor your VMware ESX Servers using SNMP. Monitoring VMware ESX Servers with...

November 14, 2008  4:21 PM

Cisco Service Provider Router Overview – the most powerful routers ever made

Posted by: David Davis
Cisco, Networking, Routing

In a recent article, I covered the Cisco service provider router lineup. These amazing routers are what allow us to surf the web and watch IPTV. In this article I cover routers like the CRS-1 (Cisco's most powerful router) and the new Cisco ASR 9000 and 1000 routers. To see the full article, read ...

November 13, 2008  8:49 PM

Hyper9 Beta Invitations

Posted by: David Davis
Cisco, Virtualization, VMware

Hyper9Hyper9 is a VMware Virtual Infrastructure Management platform. The most powerful feature is its "search engine" for your virtual infrastructure. As Hyper9 can do so much, it is...

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