How to Build your own AnyCast Network

you’re using anycast every day. all public resolvers (1.1.1.1, 8.8.8.8, 9.9.9.9) for example are anycast ip’s and hence, many servers distributed around the world which listen and announce the same ip address.

we can build a proof of concept, how to build such a network, for a few $.

Requirements

AS Number

Anycast heavily depends on BGP. So, you need a own AS Number. I got my for 15 CHF/Year from Securebit.ch. You should also keep in mind that you will not get any IPv4 addresses without buying them for the market. So, your Setup will be based on IPv6 only.

When is an anycast ip an anycast ip ?

that’s a question i was asked recently. As LTNN (Long Term Networking Nerd), i’m aware of Unicast, Multicast, Broadcast and also Anycast. so, let’s have a look into this.

hint: this article is not about how to setup your own anycast network. this may follow soon ?!?

Terminologie

Unicast 1:1

Sending a message from one sender to one recipient

Multicast 1:many

Sending a message from one sender to multiple recipients