A /48 is the minimum folks will pass via bgp on the internets (it's the /24 of the ipv6 world). Also another fyi: if you're rolling commodity hw (bcm tridents

A /48 is the minimum folks will pass via bgp on the internets (it's the /24 of the ipv6 world). Also another fyi: if you're rolling commodity hw (bcm tridents etc) after a /64 up to /128 you are dipping into another constrained forwarding table - can't fill your box with too many of those.