- Shopping Bag ( 0 items )
The Ethernet is ...
The Ethernet is now the "de facto worldwide standard for local area networking hardware." This technical overview and tutorial of Ethernet technologies and hardware requirements brings you up to speed on the standard. It teaches you how to use Switched, Fast and Gigabit Ethernet products. For best understanding, you should have previous LAN and Ethernet experience.
Ease of Migration
Ease of migration is probably the most important consideration in determining the best technology for upgrade. If you are building a new network from scratch, this section doesn't apply to you. If you already have a network that you are growing or that needs a performance boost, however, this section is probably the most important point to consider.
You need to leverage your existing investment as much as possible. This investment includes the hardware itself, but also the tools, and your knowledge of the technology itself.
To ensure an easy migration, ask yourself these five questions:
Can my cabling plant support the higher-speed networking technology?
Before you decide to purchase high-speed networking hardware, make sure you understand the capabilities of your existing cabling plant. Your investment in cable, conduits, wiring closets, and patch panels can exceed the cost of the networking hardware itself! You need to make sure your new high-speed networking gear can run on your existing wiring wherever possible. If that's not the case, factor in potentially huge additional costs for upgrading your cabling plant to accommodate the new LAN standard.
How do I boost performance of my existing clients and servers with minimum cost and disruption to my users?
Most LAN managers will want to keep as much of their existing equipment as possible because it's working, proven, and already paid for. Replacing equipment is always disruptive and time-consuming and should be avoided wherever possible. Replacing network adapters should be avoided at all cost, for example; whereas the price of a new NIC alone may not seem that high, the cost of installation, configuration, and associated user disruption often exceeds the cost of the NIC itself. If redesigning your network and replacing a single strategic hub instead can increase the performance of the network, choose that way.
You should avoid replacing equipment prematurely Networking gear is part of company's capital budget, meaning that the equipment needs to last for a period of five years before it is, in effect, paid for. Your accountants will tell you that replacing equipment before the five-year depreciation period is over can be prohibitively expensive because the equipment needs to be depreciated in one go for those purposes, which is a costly undertaking.
How do I connect new users or servers to the new network infrastructure?
When you add new users to your network, choose the best equipment available at the time. These new users will likely have faster machines, requiring a higher-speed network connection. Make sure the new technology scales to accommodate faster user and server connections.
How do I join a new section of my network with an older part?
New sections of your network will need to be seamlessly connected to your existing network. Think about how you are going to integrate the old and new sections. If you need to purchase additional hardware or software equipment, this will affect your overall cost. User disruption or server downtime should be minimized, if possible. Don't forget network management: Make sure your new networking gear can blend seamlessly into your existing network management map.
What happens to the replaced equipment? Can I use it somewhere else in my LAN?
Another point to consider when upgrading to a new high-speed LAN is' what to do with the old equipment. Often, new high-speed equipment is added one step at a time, replacing at least some existing equipment. Your cost analysis needs to reflect whether the replaced equipment can be used somewhere else or whether it becomes obsolete.
Understanding the Technology
Your technical understanding of a new technology needs to be a key part of deciding which hardware technology to migrate. If you buy something completely new, you and your network/IT staff will need to learn about the new technology before you can deploy it. A steep learning curve will accompany new technology, and years of familiarity will have to be relearned.
Maintaining a new technology presents its own set of challenges, too. You will need to buy and learn new network management and troubleshooting tricks and tools. Some people say that today's investment in IT is 20% hardware and software and 80% worker knowledge on how to use this hardware. Therefore, although it may sometimes seem to pay to buy something completely new, make sure the benefits outweigh the hidden costs.
Your technology should grow as your network continues to grow. Can you upgrade one more step or are you buying a technology that has reached its limits? Does your network design lend itself to further upgrades? Scalability, for example, can mean that the technology can support a higher speed, that you can upgrade from a shared-media environment to a faster point-to-point or switched environment, or that you can add different hubs somewhere on your network to improve the overall throughput capability.
Make sure as many vendors as possible support whatever you buy The following are some reasons why you should buy products manufactured by multiple vendors:
Most LAN hardware sold adheres to some industry standard, yet the quality standards vary. A good standard means that hardware vendors can build equipment that is truly interoperable. Interoperable means you can buy two pieces of hardware from two different vendors, you can connect the two devices together, and they will work without fine-tuning or detailed configuration work. To accomplish that, the standards documents must be clear, unambiguous, and, above all, leave little open to interpretation. A standard, however, needs to be open enough to enable vendors to add their own features to differentiate their products. In addition, a good standard needs to be respected, or authoritative. This means that vendors building products will actually go to the trouble of obtaining and understanding the standards documents and specifications before building products. Over-all, writing good standards takes experience and requires a good sense of balance....
Posted April 28, 2000
This book is amazing in the depth and clarity it provides. I do not have any other Ethernet reference and it has never failed me. From Manchester Encoding to VLANS, from Switching to Planning my network, it's your all-in-one reference. Recommended.Was this review helpful? Yes NoThank you for your feedback. Report this reviewThank you, this review has been flagged.
Posted March 9, 2000
I was really pleased with both the information containted in this book as well as the manner in which it was presented. This book's organization makes it great for a 'cover-to-cover' read (on a VERY long weekend!) or for a quick reference check. If I could only have one Ethernet book on my shelf, this would be it.Was this review helpful? Yes NoThank you for your feedback. Report this reviewThank you, this review has been flagged.