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Bill CarmadaOK, close your eyes and imagine. You're going for your CCIE. You've taken your 100-question written exam. It was tough, but you survived. Now, it's the morning after a long flight, and you're standing next to a senior Cisco internetworking engineer in one of Cisco's exam labs. You have no notes. You're facing a stack of routers and switches with varying interfaces, each running a different version of IOS. You're handed instructions:
1. Please configure an OSPF domain with variable length subnets for the address space of 10.0.0.0. Some are to be 24 bits; others 26 bits.
2. Next, please configure an RIP domain with 24-bit subnets for network 10.0.0.0. 3. Once both OSPF and RIP domains are configured, please exchange routing table information between them via the process of redistribution.
4. Finally, please ping all the interfaces in both the RIP and OSPF domains.
Did you catch the conflict between RIP and OSPF subnetting rules which prevents RIP from recognizing OSPF routes, so RIP routers can't ping OSPF domain interfaces? Did you know you could solve the problem using OPSF route summarization? Great. But don't relax yet: the Cisco engineer is introducing faults into your network. Your job: to recognize, isolate, document, and resolve every one.
This is why only 30% of CCIE candidates pass on the first attempt. And it's why you need Cisco Certification: Bridges, Routers and Switches for CCIEs, by Andrew Bruce Caslow. Caslow is a long-time CCIE whose company is one of only nine that have been certified by Cisco to provide CCIE training. He compares the CCIE lab to the Apollo 13 mission the moment after that legendary on-board explosion; you never know what terrifying event will come at you next, so you'd better be prepared. And he's distilled years of Cisco training expertise into a set of practical techniques and thought processes you can use to spot just about any challenge you're likely to encounter.
You'll start with an in-depth review of the physical and data-link foundation of Cisco-based internetworks including LAN and WAN interface configuration, non-broadcast multiple access configuration (Frame Relay, X.25 and ATM), and switched configuration (ISDN and asynchronous).
Next, you'll move on to the network layer: IP address planning, subnetting, route summarization, and the mechanics of configuring RIP, IGRP, OSPF and EIGRP. Building on what you've learned, you'll master routing IP between autonomous systems using BGP4. By now, you've learned all you need to design, implement, maintain and troubleshoot large-scale IP internetworks. But not all you need to pass the CCIE written and lab exams. Caslow also walks you through configuring non-IP routing protocols such as IPX, AppleTalk and DECnet, as well as non-routable protocols including SNA and NetBIOS.
Then, once your IP or multi-protocol traffic is configured and working properly, you'll learn detailed techniques for controlling and filtering it with access lists, access expressions, queue lists, dialer lists and routemaps.
Cisco Certification: Bridges, Routers and Switches for CCIEs is replete with tips and tricks for analyzing, configuring and troubleshooting internetworks more effectively-in or out of the lab. Because, hey, as long as you're going to pass the first time, you might as well have a book you can use afterwards, right?
Bill Carmada @ Cyberian Express