Decentralized network 42 A real Clos Network

Decentralized network 42 (also known as dn42) is a decentralized peer-to-peer network built using VPNs and software / hardware BGP routers.

http://nixnodes.net/dn42/graph/

While other darknets try to establish anonymity for their participants, that is not or that suits for dn42. It is a network to explore the technologies used in the Internet and try to establish direct connections between the members.
The network is not totally mesh. Dn42 hardly uses the physical links between individual networks, but as virtual links.
These virtual links use to the Internet as transport, but are logically independent from dele, you can treat a virtual link more or less as a fiber or copper link. Everyone has a VPN connection for one or more participants. As conexões is linked to a public IP endereço. You can decide to use GRE ou SIT or diactc (Diac24 Tunnel Controller) to update or Address IP public end of connection point in IP changes. OpenVPN is capable of doing this without outside help. Through BGP VPN connection is used for the inter-AS route, by OSPF pad for intra AS routable, more participants can obviously use any protocol that understand for purposes of forwarding within their own address space.
The IPv4 network connection space consists of private sub-networks: 172.22.0.0/15 and the main sub-network. Note that other private data intervals can also be announced in DNS42, as a network and interlinked com Other similar objects .. More notably, ChaosVPN uses 172.31.0.0/16 e parts of 10.0.0.0/8.
For IPv6, both  unique to local addresses (ULA) and globally routable addresses areused, as preferred by ULA
AS numbers
To use BGP, in a private environment, you need the autonomous system numbers. dn42 uses private or reserved numbers as faixas numbers, including 64,512-64,855 and 76,100 for 76199.  June 2014, dn42 começaram to use a private range nova, 4242420000-4242429999 , part of maior particular range pela RFC 6996 defined
BGP rippers
Equipment used no dn42 consists of routers, which are not always a cheap solution. There are basically four implementations for BGP on standard hardware. The most common is in dn42 Quagga, a fork of not maintained GNU Zebra, which runs on most Linux Unices more than * BSD to OpenSolaris. It was also used in dn42 and OpenBGPD that was executed not OpenBSD. There is also XORP "business class" or simplistic BIRD, for which are not very common in dn42. It also has some machines running JUNOS, or Juniper operational system, which is used with professional hardware.