Gert,

Gert Doering wrote: If the ISP dies hard enough so that their prefix will disappear,

Which is the #1 reason to multihome.

they won't be visible to people that filter on /32 boundaries and have no fallback default route to one of their upstreams.

Which is precisely why long prefixes with filtering do NOT work.

Can't check those slides right now, now proprietary-file format-viewer available, sorry. Will check tomorrow.

Even hard-core pro-unix Microsoft haters use powerpoint, but I did make a pdf too. http://arneill-py.sacramento.ca.us/ipv6mh/pa_holes.pdf http://arneill-py.sacramento.ca.us/ipv6mh/pa_holes.ppt Michel.