IPv6 Multicast Scope Field
Scope
Range
Description
0
(undefined)
 
1
Node
Local on the same host (like 127.0.0.1).
2
Link
Messages stay within the routerís group. The routers never let these messages pass through.
3-4
(undefined)
 
5
Site
As defined by the network administrators, the messages stay within the siteís locality.
6-7
(undefined)
 
8
Organization
As defined by the network administrators, the messages stay within the organizationís locality.
9-13
(reserved)
 
14
Global
All routers permit messages to pass through the global network (until they expire).
15
(reserved)