From: nicky noname (cisco2study@gmail.com)
Date: Wed Oct 31 2007 - 07:59:46 ART
Hello!
I have come across this alot in the documentation ( also on the sample
configs with sparse-mode) and it seems to stress that you must configure
this command to prevent multicast groups from defaulting to dense
mode........regardless of interface configuration and in absense of RP.
Now, this is implying that if I configure "ip pim sparse mode" in the
interface and I DO NOT have "no ip pim dm-fallback" configured.......that if
someone tries to multicast for an particular group that is undefined by an
RP, it will revert to dense mode on the network.
I don't believe this but!!.....I will test today!
some experienced comments...have you tested this. If it is the case, then
you must always put this command in when you want no dense
mode..........even if you have sparse only configured!.....doesn't seem
right
thanks
Nic
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