Exchange point requests for IPv6 address space

[J. Scott Marcus]

At 05:02 05/10/2001 -0400, Richard Jimmerson wrote:

>I believe it was discussed during the RIPE meeting that
>not more than a /127 was needed to connect two peers at 
>an exchange point.  

Based on the following definition of an exchange point, a /127 seems
marginal, not so?

>An Internet Exchange Point was defined as follows:
>
>3 or more ASes and 3 or more separate entities attached to a LAN (the
>same infrastructure) for the purpose of peering and more are welcome
>to join.

For a shared medium, which seems to be implied, each interface would be
assigned a value in the right hand 64 bits based, typically, on MAC address
or the like.  So a /64 assignment would work (I agree with Randy), but
would preclude expansion to provide subnetting.

Most providers greatly prefer exchanges to operate at Layer 2 rather than
Layer 3, so maybe that's OK.  Perhaps I spoke too soon...  I guess that
subnetting can indeed be excluded.