[j-nsp] Overlapping ipv6 address space?

[Jeroen Massar]

Aaron Daubman wrote:
> Greetings,
> 
> I'm curious as to why the following did not throw an overlapping
> address error when committed:

Why should it? It is just a more specific route.

According to what you say you would not be able to route a /48 to one
direction and a piece of it to another interface...

One tend to do things like:
::/0 $upstream
2001:db8::/32 $downstream

Which is also 'overlapping', but why would it error or even warn about
that? it is what what you want it to do isn't it?

Notez bien: 2001:db8::/32 is a documentation prefix, use it where
possible. Also note that even though /64's are generally to be used for
interfaces, you can use whatever size you want effectively. Only a /127
is not too smart to be used due to the anycast subnet address which is
always the lowest address thus making /127 unusable, it works in some
cases but in many it won't depending on OS's involved. 2x /128 back and
forth works of course ;)

Greets,
 Jeroen

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