Quagga

[http://www.quagga.net Quagga] is an open source GPL licensed IPv4/IPv6 routing software, originally forked off of the [http://www.zebra.org zebra] project.

The supported routing protocols are

RIPv1
RIPv2
RIPng
OSPFv2
OSPFv3
BGP-4
BGP-4+
ISIS

Quagga also supports special BGP Route Reflector and Route Server behavior. With SNMP daemon which supports SMUX protocol, Quagga provides routing protocol MIBs IPv6 routing is fully supported in RIPng, OSPFv3 and BGP-4+.

Router advertisement

One can enable IPv6 router and prefix advertisements on an interface:

    interface eth0
        ! do not suppress IPv6 router advertisements
        no ipv6 nd suppress-ra
        ! include IPv6 prefix in router advertisements
        ipv6 nd prefix dead:beef::/64