Pekka,
Pekka Savola wrote:
If you want to create point-to-multipoint tunnels over v4 multicast
infrastructure, wouldn't the obvious solution be simply using
configured tunneling? That is, you configure the tunnel destination
v4 address to be a multicast address (this requires zero code
changes), and the decapsulators configure their "local end" to be the
multicast address (requires code change in the tunnel setup tool to
permanently join the specified multicast address)?
As you know, the decapsulating end of a configured tunnel requires
a specific IPv4 source address for the "remote end" of the tunnel, so
the configured tunnels you describe would only be able to decapsulate
multicasts from a single specific encapsulator. I.e., you would need
one such configured tunnel for each potential encapsulator (which
could be a large number).
If you want a single tunnel interface that could decapsulate multicasts
from *any* decapsulator, you would need something like 6over4 (or,