IPv6 Lo. for 6PE/6VPE

[mohamed.abosree at gmail.com (mohamed Osama Saad Abo sree)]

Hello,

I was just wondering , while I'm planning my network to support 6PE/6VPE
why should i assign an IPv6 for Loopbacks?

Maybe it's needed for Point-Point links or external interfaces between my
peers, but anyone here know why i should assign IPv6 for all my Routers
inside my ISP if we will run PE/6VPE not dual stack.

BR,
Mohamed