Valdis.Kletnieks@xxxxxx wrote: > Imagine if somebody >flubs and withdraws a /12 and announces a /12 worth of /28.... That's why I suggested relaxing the filters only within a designated block. So (for IPv4) the /12 worth of /28s gets ignored, but the /32s in the micro-allocation block are accepted. It always seemed odd to me that we allocate a /24 per anycast service, and worry about the address space wastage, when all the anycast services we can expect to find useful in IPv4 will comfortably fit into less than a single /24. If there's a problem due to the need for 100% implementation of the relaxation of prefix length filters, we should allocate a micro-allocation block for IPv6 *now*, while the number of routers requiring reconfiguration is relatively small. I propose 0:1::/32, which is distinctive, causes no fragmentation, and is in a region of the address space already recognised as being for weird stuff. -zefram