Failover IPv6 with multiple PA prefixes (Was: IPv6 fc00::/7 -Unique local addresses)

[gbonser at seven.com (George Bonser)]

> 
> Seems to me the options are:
> 
> 1) PI, resulting in no renumbering costs, but RIR costs and routing
> table bloat
> 2) PA w/o ULA, resulting in full site renumbering cost, no routing
> table bloat
> 3) PA w/ ULA, resulting in externally visible-only renumbering cost,
no
> routing table bloat
> 

In my particular case, IPv6 offers no advantage when it comes to
renumbering.  It is just exactly as difficult to renumber with v6 as it
is with v4.  I do understand that in a lot of cases where end nodes are
autoconfiguring based on RA it makes it easy but in many places that
really isn't an option.