From: Petr Lapukhov (petrsoft@gmail.com)
Date: Sat Mar 25 2006 - 05:15:50 GMT-3
Hello Dave,
With pim sparse-mode you could either use pim spt-threshold infinity
to prohibit switching to SPT, or use pim bidir mode for a group - it
actually uses only shared tree for multicast delivery.
ip pim dm-fallback specifies, that if PIM router loses RP for a group
(e.g. it misses AutoRP announces), it should switch to dense-mode
delivery mode for that group.
There is no SPT being built in dense mode actually, just repeated
flooding & pruning.
HTH
Petr
2006/3/24, Schulz, Dave <DSchulz@dpsciences.com>:
>
> Group -
>
> When using the spt-threshold command....the "infinity" option keeps the
> leaf router from building a shortest path tree to the source. So, could
> the same thing be also accomplished with the "no ip pim dm-fallback"
> option, which would prevent the specific group or client on the leaf
> router from running in dense mode and continuing to pull from the RP?
>
>
> Dave Schulz,
> Email: dschulz@dpsciences.com <mailto:dschulz@dpsciences.com >
>
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