> - Ideally, having a 6bone topology matching the underlying IPv4 Internet > topology is a neat objective. We've been trying to do that for a while with > little success. Remember that the 6Bone connects entities doing research on > Ipv6, not yet operators. Is it not possible to reflect IPv4 topology in BGP? An example would be mapping the IPv4 hop count for a tunnel to BGP metric. /Lalle