MQTT SN Multicast Addresses
This is a proposal, the addresses have not be peer-reviewed or registered with IANA.
| Scope Name | MQTT-SN Radius | IPv6 Address | IPv4 Address |
|---|---|---|---|
| Node-Local | 0 | FF00:0:0:0:0:0:0:75B | 239.255.255.72 (with TTL=0) |
| Link-Local | 1 | FF01:0:0:0:0:0:0:75B | 239.255.255.72 (with TTL=1) |
| Realm-Local | 3 | FF03:0:0:0:0:0:0:75B | |
| Admin-Local | 4 | FF04:0:0:0:0:0:0:75B | |
| Site-Local | 5 | FF05:0:0:0:0:0:0:75B | |
| Organization-Local | 8 | FF08:0:0:0:0:0:0:75B | 239.195.255.72 |
| Global | 14 | FF0E:0:0:0:0:0:0:75B |
Notes:
- Addresses use scope relative addressing
- For IPv6: 0x75B = 1883 in decimal
- For IPv4: 72 = 255 - 183
The scope descriptions are taken from RFC4291.
- Node-Local: spans only a single interface on a node and is useful only for loopback transmission of multicast.
- Link-Local: spans the same topological region as the corresponding unicast scope.
- Admin-Local: is the smallest scope that must be administratively configured, i.e., not automatically derived from physical connectivity or other, non-multicast-related configuration.
- Site-Local: is intended to span a single site.
- Organisation-Local: is intended to span multiple sites belonging to a single organisation.
- Global: the whole of the internet
