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Cisco CCNP Certification Introduction To BGPCisco certification candidates are introduced to BGP at the CCNP level, but the reaction to its introduction always reminds me of something I see often as the CCNA level. Introduction To ISDN Part III PAP Introduction To ISDN, Part III: PAP Introduction To ISDN, Part III: Configuring PPP PAP Authentication Now we know how the ISDN link comes up (interesting traffic), and some scenarios that might cau.. If you're in a position where you're used to seeing or working with routing protocols such as EIGRP and OSPF, you're probably now working with BGP. BGP is not a protocol you're going to configure at the office LAN. BGP is used to connect autonomous systems, which are very large "collections" of networks. (Those of you who have studied IGRP and EIGRP are familiar with the concepts of an AS.) As opposed to routing protocols such as EIGRP and OSPF, BGP is an exterior routing protocol. BGP is not used to find a specific network instead, it's used to find the AS where that given network can be found. A good way to look at it is that networks are contained in Autonomous Systems BGP helps you find the AS where a given network is found. Routing protocols such as OSPF and EIGRP take it from there. BGP Terminology You'll be happy to know that BGP has a terminology all its own. Well, you might not be happy about it, but it does! I'm not going to throw a bunch of terms at you right now, since these terms are better introduced to you when you can see what they do. Having said that, here are a couple of basic BGP terms that will help you make the transition from IGPs to BGP. aggregation - This is just the BGP term for summarization. You're familiar with route summarization from your CCNA studies, and if not, it's time for a review from my Ultimate CCNA Study Guide. I told you you'd be using those skills for a long time! IGP - Interior Gateway Protocol. These are routing protocols that run within an Autonomous System, such as OSPF and EIGRP. Ten Great Careers For Computer Geeks Ten Great Careers For Computer Geeks The universal acceptance of computers into our daily lives, both at work and at home, has decreased the image of computer users as being ,geeks., The word geek.. EGP - Exterior Gateway Protocol. Remember from your CCNA studies that EIGRP routes are indicated by the letter "D" in your routing table? Ever wonder why? EGP, that's why. Run show ip route and take a look at the routing table key. EGP was BGP's predecessor, and is still in the routing table. EGP was there before EIGRP, so that's why "E" in the routing table doesn't indicate an EIGRP route. We'll be adding to this list a great deal in the next few weeks. Now that you've got a grasp on the differences between BGP and the IGPs you've been working with up to this point, it's time to start looking at some basic BGP concepts and configurations. Look for Part II of this BGP tutorial over the next few days! To your success, Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of freeCCNP andCCNA tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages. For a FREE copy of his latest e-books, ,How To Pass The CCNA, and ,How To Pass The CCNP,, just visit the website! You can also get FREE CCNA and CCNP exam questions every day! Pass theCCNP exam with The Bryant Advantage!
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