Link-Local
224.0.0.0/24 is the range used
224.0.0.1 All Hosts
224.0.0.2 All Routers
GLOP Addressing
GLOP addressing is used to give anyone with their own registered public AS number their own globally unique multicast IP address range.
233.0.0.0/8 is the reserved GLOP range.
233.x.x.0/24 is the actual address you use, where x.x is the 2 bytes of your AS number. If your AS was 54321, convert it to hex = D431. Here D4 is the first byte, and 31 is the second byte. D4 into Decimal is 212, and 31 into decimal is 49. So your range is 233.212.49.0/24
The drawback is that it only works with 2 byte AS numbers
GLOP doesnt stand for anything, its just called GLOP
Administratively Scoped Addressess
239.0.0.0/8 is the reserved range
IP addresses in this range should be filtered on the edge of the administrative boundary
This range of IPs are only guaranteed to be unique within the administrative boundary (eg, within the BGP AS)
Source Specific Multicast
232.0.0.0/8 is the reserved range for SSM
Used to identify exactly what source & group a device wants to receive multicast traffic for
SDP/SAP
224.2.0.0/16 is the range used