How I obtained my own AS number and IPv6 prefix, set up a FreeBSD BGP router with FRR, and built a tunnel overlay to bring globally routable addresses to servers that already have provider-assigned IPv6 - using dual-FIB policy routing to make both coexist.

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A comprehensive guide to obtaining an AS number and IPv6 prefix from RIPE, configuring a FreeBSD BGP router with FRR, and implementing GRE/GIF tunnels to distribute globally routable addresses to remote servers. The article covers dual-FIB policy routing to enable servers to simultaneously use both provider-assigned and BGP-routed IPv6 addresses, with detailed configurations for BGP peering, PF firewall rules, tunnel setup, and traffic engineering using AS-path prepending and BGP communities.

Running Your Own AS: BGP on FreeBSD with FRR, GRE Tunnels, and Policy Routing

The Downstream Server: Dual-Stack with Policy Routing