I just tested it in SM mode. What happens is that no more streams can be
send because of the exhaustion of all data-mdt's. Switchover to data-mdt
is configured to 1 and as soon as traffic arrives a data-mdt is tried
to open and unfortunately fails therefore.
Really? That's got to be a bug. What platform are you on?
What should be the behavior if no bug would be insolved? Continue to stream
the new group to the default-mdt?
The only solution as far as I can see is to do SSM without a data-mdt.
Sure I could also use SM without a data-mdt but that would concentrate
everything on the RP which would be the worst case of all.
You seem to be mis-understanding how PIM-SM works. When a source starts
up, only the *first few* packets are tunneled via the RP; these few are
forwarded down the shared tree, which triggers the other PEs to do a join
to source, and the traffic then flows optimally; the RP will then send a
Register-Stop to the PE of the source, which stops the tunneling.
No Iam not mis-understanding how PIM-SM works :-)
What i tried to explain was that if no more than 255 data-mdt's can be
created how can I stream to more than 255 multicast groups: Only solution
would be to do it without a data-mdt which would result in forwarding
everything over the Core-RP (default-mdt) with PIM-SM or to do it in
PIM-SSM and forward everything to every PE but at least on the shortest
reverse-path (SPT).
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