Layer 3 switches are becoming more and more common in the Enterprise. After reading this tip, you’ll know the difference between a switch, a router, and a Layer 3 switch. You’ll also understand what to look for when shopping for Layer 3 switches.
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From the monthly archives:
August 2007
Layer 3 Switches Explained
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Product Review: Windows Vista Video Training
Recently, I reviewed Train Signal’s Windows Vista Video course covering just about everything you could need to know concerning Vista. This video was created by MCSE Instructor Scott Skinger. He is really a master at explaining how to use Vista, not only as your desktop OS but from an Administrator’s point of view.
After watching the video, I felt confident using and administering Vista. While the video was 19+ hours long, it was broken down into many smaller videos that I could watch just on certain topics that interest me.
I would highly recommend this Windows Vista video series. Take a look at the 9 minute video demo below, covering the NEW Windows Vista User Account Control!
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Five steps to prepare your network for VoIP traffic
You may not know that your network has any issues until you add VoIP traffic to it. This is because VoIP traffic is much more sensitive to latency, jitter and packet loss than typical network applications. So how do you adjust your network to accommodate this new VoIP traffic? Let’s find out.
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Network summarization — Supernetting and wildcard masks
Supernetting was created as a way to solve the problem of routing tables growing beyond our current ability to manage the exhaustion of Class B network address space. Much like one area code represents an aggregation of telephone numbers in an area, supernetting allows one routing table entry to represent an aggregation of networks. If you need to enter a static route to several subnetted networks, you can use network summarization to reference them all in one route. Just the same, you need to understand how to read routes received from other providers. You must also know how to create an access list that references these multiple networks in a single summarized statement. In this tip, you’ll learn more about the IP addressing-related topics of network summarization, supernetting and wildcard masks.
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Managing IP address allocation during network expansion
When you are designing or expanding your network, it is important to know how to manage IP address allocation properly, because this is crucial to the performance and expandability of your network. Here, we cover how to properly allocate IP addresses for a new network — and what to do if your network runs out of IP addresses. Learn that and more in this exciting article from David Davis, CCIE.
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How to Configure a Cisco Wireless Access-Point (AP) from Scratch
Cisco APs are strong and reliable but require a little more configuration than your typical Linksys, Dlink, or Netgear. In this article, you will find out how to configure this enterprise grade wireless AP (a Cisco 1242G) to allow your wireless users to connect to your LAN, through your Wireless LAN (WLAN). Lots of photos are included!
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Vulnerability in Cisco VPN Client
If you are using the Cisco VPN client you should really take note of this. A serious vulnerability has been found by the folks over at NGS Software and Cisco has released a vulnerability advisory regarding Cisco VPN Client. For more information, read on….
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FREE Cisco router poster
On my wall, I have a very nice Cisco poster.
It is a great resource if you are not sure what Router or Switch model you need (or even just to look like the coolest Cisco-guy in the office).
With this, you can quickly and easily identify what you need.
This quick reference poster provides information on model capacities, interface cards and available features…and it’s free!
On my wall, I have a very nice Cisco poster.
It is a great resource if you are not sure what Router or Switch model you need (or even just to look like the coolest Cisco-guy in the office).
With this, you can quickly and easily identify what you need.
This quick reference poster provides information on model capacities, interface cards and available features…and it’s free!
This poster is mailed out free from a Cisco reseller called World Data Products.
If you are interested in requesting this free Cisco poster for your wall, you can obtain it by clicking here.
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The 15 BEST Network Administrator / Cisco Network Management Utilities - EVER
I sat down and tried to make a list of, what I considered to
be, the 15 best network management utilities that I had ever seen. Here is that
list. What do you think? Post your comments on our website!
1. Top 100 Security Tools
2. Switch Inspector
3. PRTG - Free bandwidth graphing
application for Windows
4. Boson
GetPass, Cisco Password
Decoder, and
Cisco Password Cracker - all Cisco Level 7 Password Decryption Tools
5. Cain and Able Security Audit
5.5.
Train Signal Video CBT training
But wait, there are 10 more to go…..
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Cisco ACL Editor and Simulator
I consider myself fortunate to run across a new program called the Cisco ACL Editor and Simulator. This program allows you to create ACLs in Windows GUI application by filling out fields on a form. Even better, it allows you to then take that ACL and simulate what traffic would pass through the ACL. This way, you can test your ACL’s before you apply them, saving a huge amount of time and effort.
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David Davis (CCIE #9369, VCP, CISSP, MCSE) has been in the IT industry for 15+ years. He has authored over 300 articles, 6 video training courses, and co-authored one book. Learn about David's certifications, video courses, and where you can find his content on our