Anycast DNS

In this fifth article on Anycast DNS, we provide some examples of deploying Anycast using Border Gateway Protocol or BGP, the core routing protocol of the Internet.

While BGP is mostly used by Internet Service Providers (ISPs), it is also used in some of the larger enterprise environments th...

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Anycast DNS

In this continuation of the fourth article, we improve the design with enhanced security, performance, and efficiency.

Our configuration consists of two OSPF areas 51 and 52, containing an Anycast DNS server, and pair of Cisco Routers connected to the backbone area 0.0.0.0. The Anycast DNS s...

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Anycast DNS

The fourth article in our Anycast DNS series covers Anycast DNS using Open Shortest Path First or OSPF routing protocol.

OSPF is a dynamic routing protocol used to build larger scale IP networks. It differs from RIP, because it is a link-state routing protocol and falls into the group of Int...

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Anycast DNS

The third article in the Anycast DNS series continues our discussion of implementing Anycast DNS using RIPv2

This article is a continuation of Anycast DNS using RIP in our series on Anycast DNS. In this next recipe, two Anycast VIPs will be advertised on two (2) DNS servers that are multi-...

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Anycast DNS

This third article in our series on Anycast DNS, focuses on deploying Anycast DNS using RIP v2 routing protocol.

In this article we'll be using Quagga, Open Source host-based routing software, to originate our Anycast IP address. Our upstream routers are Cisco routers, so we'll also be provi...

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Anycast DNS

This second article in our series "Anycast DNS" is a recipe for deploying Anycast DNS using static routes.

In this article we'll show our recipe for configuring Anycast using static routes, and provide an explanation as to why this is the least optimal way of building an Anycast DNS environm...

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Anycast DNS

This is the first article in series on the topic of deploying Anycast DNS.

The purpose of this series of articles is to share some ideas, recipes, and information on how to deploy Anycast in your environment.  The first thing we need to do is explain what Anycast is.  Anycast is the use of r...

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