What is the difference between Node-Local-Scope, Site-Local-Scope and Link-Local-Scope ?
What does it mean Link local (link only) ? Is it only for a Subnet ?
Why do we need site-local address then ?
Thanks in Advance
Sajith
ipv6
What is the difference between Node-Local-Scope, Site-Local-Scope and Link-Local-Scope ?
What does it mean Link local (link only) ? Is it only for a Subnet ?
Why do we need site-local address then ?
Thanks in Advance
Sajith
Best Answer
For unicast IPv6, you don't have scopes the way you have in your question. There are Reserved unicast addresses, Global unicast addresses (
2000::/3
'), Unique-Local unicast addresses (fc00::/7
, with restrictions), and Link-Local unicast addresses (fe80::/10
).IPv6 Link-Local unicast has identifiers to uniquely identify the interface in a host that are often called the scope (or zone) identifier. This is necessary because all the interfaces will use the same network. See the IANA IPv6 Special-Purpose Address Registry. The IPv6 unicast Link-Local addressing is only valid on the link because every link has the same network, and you cannot route or send traffic from one link to another using Link-Local addresses.
IPv6 multicast that has:
RFC 4291, IP Version 6 Addressing Architecture, Section 2.7. Multicast Addresses defines some of these:
RFC 7346, IPv6 Multicast Address Scopes updates the IPv6 multicast scopes: