Synopsis
Layer 3 switches integrate routing and switching to yield supersonic speeds. This text dissects the various pieces of the Layer 3 architecture and the pros and cons of using Layer 3, both packet and cut-through. It discusses Nortel's IP Accelerator, and their single box solution to switching.
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Review
Nortel Networks Layer 3 Switching explains how switching at the routing layer of the Open Systems Interconnection (OSI) reference model works. This book approaches the technology through others that may be more familiar to the network administrators at whom this book is targeted, such as traditional switching and traditional routing. Further, it explains how the architect of an internetworking solution can derive top performance from cut-through switching. Mostly, the writing is very clear and straightforward, assuming relatively little knowledge (only general familiarity with networking and internetworking concepts) on the part of readers.
Though it doesn't go into much detail on precisely how to configure routing switches or any other piece of equipment, the book focuses on Nortel Networks' Passport (formerly Accelar, formerly from Bay Networks) line of products. Readers get a rundown on the capabilities of each Passport device from the 1050 through the 8600. The emphasis is on what each product can do ("The 8600 routing switch module is designed for use in campus and building backbones..."), rather than on the specifics of its configuration. Tables describe throughput of products, number of ports and ranges of add-in modules. Other sections explain what goes on inside a Nortel routing switch, using a few conceptual diagrams to get the facts across. --David Wall
Topics covered:
- Reasons for implementing layer 3 switches (also called routing switches and cut-through switches) and devices that exist for that purpose
- Data communication protocols
- Routing algorithms
- Quality of Service (QoS)
- Alternatives to Internet Protocol (IP)
- The Nortel Passport line of products
Review
Regis "Bud" Bates is back (best known for his "Voice and Data Communications Handbook") with "Nortel Networks Layer 3 Switching." Using examples on the deployment of Layer 3 (both types: packet by packet and cut-through), Bates tackles Layer 3 architecture along with the issues of use surrounding the networking protocol.
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Nortel Networks Layer 3 Switching
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