Scoping Issues on PIM (1) IPv6 scoped addresses

Scoped unicast addresses
3 types
link-local addresses: fe80::/10
site-local addresses: fec0::/10
global addresses: others

Scoped multicast addresses
4-bit scope field in a multicast address
We do not have to define multicast scope by hop limit of multicast packets.

5 scopes are predefined
node-local(1): e.g. ff01::1
link-local (2): e.g. ff02::2
site-local (5): e.g. ff05::abcd
organization-local (8): e.g. ff08::1234
global (14): e.g. ff0e::12ab