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Entries with tag bgp multihoming.

What is BGP?

What is BGP?   BGP stands for Border Gateway Protocol which highlights the fact that BGP is an exterior gateway protocol (EGP) as opposed to an interior gateway protocol (IGP).  BGP was created to route between autonomous systems (AS’s), which are a collection of connected IP (Internet Protocol) routing prefixes under the control of one or more network operators that provide one common  routing policy to the Internet.  BGP does not route within Autonomous Systems, it is essentially a mapped collection of interconnected Autonomous Systems.    When considering the entire Internet, you can imagine that there are a LOT of AS’s out there.  Each BGP router maintains its own BGP table which is a mapping database in which we can see all of the networks out there, and also to which AS they belong and which AS’s we have to cross in order...
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How Do I Make Sure That My Business Is Always Connected to The Internet?

Whether your company lives on the Internet or you use the Internet for day-to-day operations, your business’ success relies heavily on your Internet connectivity or “ high availability .” High availability means that you’re always available in terms of reach via the Internet. This could mean that you’re available to customers trying to email or call you or even visit your website. It also means that within your company, employees are able to access their email and in many cases, even their office landlines since many office phones today connect via the Internet. Whatever the case, it’s important that you keep your business online. One way to help ensure that you stay connected is through multihoming . Multihoming simply means that instead of having one Internet connection link, you have multiple. This can be two or more links from the same provider or multiple...
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Have You Considered Any of These Technologies As Redundant Internet Access Options?

With newer, faster and shinier technologies emerging every day, it’s funny that HOW we connect to the Internet has done little evolving. Yes, speeds have increased and most cabling has changed from fiber to copper, but the HOW has NOT changed. With Internet connectivity there are only three ways access is provided: a static route, object-tracking NAT or BGP. All of these technologies are tried and true and will most likely be around for quite a while. Well, that has changed with the introduction of LISP (Locator/ID Separation Protocol), an easier, more cost-efficient technology that is a whole new way to access the Internet. Currently, if you are using any of the previous technologies (a static route, object-tracking NAT or BGP), you are limited to using only one ISP circuit at one time. This negatively reflects on your monthly CAPEX, as you are essentially paying for a circuit...
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Multihomed BGP - Why Aren’t I Going Faster On My New 100M Circuit?

So, you’ve taken your new budget and purchased a brand new 100M Circuit from a second provider for greater speed and higher availability than your sole 20M link provided you and you can’t wait for the words of praise about how great the Internet is working to start coming in from your co-workers and higher-ups. Days go by, weeks go by, and now it’s months and nobody, including yourself, is noticing any significant changes in Internet speed. You may even think about calling the company from which you purchased this supposedly wonderful link to complain, but the explanation is actually quite simple. So simple, in fact, that the answer to your problem is only three letters long: BGP   Unfortunately, BGP doesn’t care about your 100M link. When you multihome with BGP, the BGP best path selection algorithm running on the ISP’s upstream routers often (maybe even more...
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Should I Run My Business Over Broadband Circuits or BGP?

  When trying to figure out whether to run your business over Broadband Circuits or BGP there are many things to consider.    One of the most appealing features of broadband is  the pricing. When comparing broadband to BGP capable circuits, the price of broadband is merely a fraction of the cost. For example, in New York City, a broadband cable connection that provides 50M down and 5M up may cost somewhere between $200 - $300 a month.  A 50M Symmetric (50M down/50M up) Metro Ethernet or other BGP capable circuit may cost $1500 a month.  This is no small difference in price and definitely a big drawing point of Broadband circuits.    Broadband services will be statically routed by the carrier to the carrier edge equipment and will usually have a small IP block, /29 - 8 IPs, but usually less. You won’t be able to run...
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