You'll still probably carry the /128 loopbacks in your IGP to deal with your iBGP mesh.
Owen On Dec 14, 2011, at 9:54 PM, Glen Kent wrote: > Hi, > > In the service provider networks, would we usually see a large number > of /128 prefixs in the v6 FIB tables? > > In an IP/MPLS world, core routers in the service provider network > learn the /32 loopback IPv4 addresses so that they can establish > BGP/Targetted LDP sessions with those. They then establish LSPs and > VPN tunnels. Since we dont have RSVP for IPv6 and LDP for IPv6 (not > yet RFC) we cannot form MPLS tunnels in a pure IPv6 only network. > GIven this, would v6 routers have large number of /128 prefixes? > > What are the scenarios when IPv6 routers would learn a large number of > /128 prefixes? > > I would presume that most IPv6 prefixes that the routers have to > install are less than /64, since the latter 64 is the host part. Is > this correct? > > Glen
