In order for IP multicast applications to function well over NATs,
multicast UDP must work as seamlessly as unicast UDP. However, NATs
have little consistency in IP multicast operation which results in
inconsistent user experiences and failed IP multicast operation.
This document targets requirements intended to enable correct
operations of Any Source Multicast and Source-Specific Multicast in
devices running IGMP proxy routing and NAT and without applying NAT
to IP multicast group addresses. This profile of functionality is
the expected best practice for residential access routers small
branch routers or similar deployments.
Working Group Summary
There was a consensus in the WG to publish this document.
This document was reviewed by both BEHAVE WG participants as well as
participants from the MAGMA WG. This has resulted in a well reviewed
document that addresses both the multicast and NAT aspects very well.
This document was shepherd by the responsible AD Magnus Westerlund due
to the author being WG chair.