docs/docs/home_network/radv.md

Radv

This document is for setting up radv on Bird 2.0.

General syntax

You will want to add one of these to one of your Bird configuration files:

protocol radv
{
    # Stuff goes here
}

Advertising your prefix

If you would like to advertise your prefix to hosts on your LAN that have set their address acquisition for IPv6 to 'Automatic' such that they will assign themselves an address within that prefix then you will want to add a prefix block as so:

protocol radv
{
    # Advertise your prefix
    prefix fd40:ec65:5b4c::/64 {
        # TODO: Add anything that needs to be in here
    };

    # Interfaces to run radv on
    interface "eth0";

}

In the above example I am advertising a /64 within my /48/ULA (fd40:ec65:5b4c::/48), fd40:ec65:5b4c::/64, and only on interface eth0 will radv run.

Advertising route(s)

You can advertise a default route, to fd00::/8 or simply all routes in your router's routing table, to your hosts using the following:

Advertising a single fd00::/8

TODO: Add this as I normally don't do this even though one should as it means less memory consumption and advertisement updates

Advertising all known routes

This will advertise all the routes your Bird router knows (those in the crxn table) such that your, laptop for example, will add all of them to its routing table.

protocol radv
{
	# Enable propagating of routes exported to us via radv to hosts
	propagate routes yes;

	ipv6 {
		# Export all your routes into the radv advertisement
		export filter crxn6;
		table crxn;
	};

	# Interface to run radv on - only eth0 (change to what you want)
	interface "eth0" {
		# Advertise your prefix
	    prefix fd40:ec65:5b4c::/64 {
	        # Defaults are fine
	    };

		# Prevent advertising of default route
		default lifetime 0;
	};
}