Cisco CCNP Certification: Introduction To BGP

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What’s the difference between Video Conferencing and Telepresence?

Telepresence picks up where video conferencing left off. Telepresence IS real time, full-high-definition, immersible sound and vision. Telepresence IS most importantly: the feeling of being “there” when you’re “here”. Telepresence is lifelike, video conferencing is not. Telepresence is that hi-line Mercedes AMG, video conferencing is a Ford Escort - Period.

Why Telepresence now?

Video conferencing has been around a while now but has always lacked the feeling we spoke about above. Jumpy computer screens, broken audio and poor lighting add to the impersonal touches of video conferencing (ie slow motion camcorder on top of your computer monitor). Finally, technology, bandwidth, vision and sound have all converged on video conferencing to create the telepresence experience. It’s about time! Crystal clear surround sound and real-time full-high-definition visual effects enhance the feeling of being there – thus telepresence. That nervous twitch, roll of the eyes, sniffle, tap of the foot – things you see when you’re present and sitting across a conference room table – things you don’t see or feel from video conferencing, but do with telepresence.

Today, what “real” uses are there for Telepresence?

There is no short answer even possible here. We’ll name a few, more like we’ll put your imagination to work. Imagine a single specialist doctor in Canada treating patients in Haiti via telepresence. Robots in space doing the actual work while the telepresence operator dons his telepresence helmet and gloves at his workstation in Texas. Meeting your Russian company vice president while you’re in the executive telepresence room at the office in Denver. Just a few…

What are “real” savings of Telepresence?

Your imagination still working on the last answer? Don’t let up yet! What carbon footprint? Don’t need that airplane ticket to go check on your staff in Russia now do you? What lost life in the Iraqi war? Unmanned drones and soldiers via telepresence. Military and combat cost savings? Immeasurable. Less travel costs, airline frustration, fuel, lost time, carbon emissions, etc. Those are tangible, real savings to name just a very limited few.

You starting to see what telepresence can do that video conferencing can’t? We hope you see what we’re seeing! Telepresence – its time has arrived!

Check out the video thread in Section 8 of the Telepresence Forum where you can watch some Telepresence YouTube videos! If a picture is worth a thousand words, a video must be worth a million!

Ride on the "Next Plane of Existence" TM

Cisco 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.

Whenever I teach distance-vector protocols in my Ultimate CCNA Boot Camp or Fast Track classes, I make sure my students understand the many rules of distance-vector routing thoroughly. After that, we move on to OSPF and link-state routing.

And what do I tell my students before we move on to OSPF and link-state? "Take all that great stuff you just learned about distance-vector routing and put it aside, because none of it applies here!"

That's about the time I get astonished looks and a few things thrown at me. :)

What's this got to do with BGP? Well, when you start studying BGP, you have to put a lot of preconceptions aside. It sounds like just another routing protocol, like RIP or OSPF, but it's not.

So... before we start studying BGP and looking at some of its many features, let's take a look at what BGP is and what it's not.

What BGP Does And Who Uses It

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.

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

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage. The Bryant Advantage sells the world's best CCNA Study Guide in PDF format for only $15 and is the ONLY company specializing in CCNA and CCNP rack rentals, allowing candidates for these certifications to gain vital hands-on experience with full racks of Cisco routers and switches with labs and prices designed just for them. In April, you can purchase full days for only $10 each!There are also plenty of FREE CCNA and CCNP tutorials! Visit his site at http://www.thebryantadvantage.com today!