From: sourabh agarwal (ag_sourabh@rediffmail.com)
Date: Wed May 21 2008 - 14:03:09 ART
Hi Manuel,
If it's asked to use only sparse mode on interfaces, then with
AutoRP scenario we need to use ip pim autrp listener command which will enable
dense traffic for group 2240.1.39 and 224.0.1.40 to pass through sparse mode
enabled interfaces.
If sparse-dense mode is configured under interfaces then
we don't need to have ip pim autorp listener command because for 2240.1.39 and
224.0.1.40 traffic will be densed and for other groups which has RP will be
sparsed. However, only disadvantage of using sparse-dense mode in autorp is
that if RP failed, entire multicast domain will fallback to dense mode which
will cause large amount of traffic to flood throughout domain if there are
several clients joining different groups.
HTH, let me know in case you need
more information.
Regards
Sourabh
On Wed, 21 May 2008 Manuel Mindez Cano
wrote :
>Hello experts,
>
>Can anybody explain when is better to use autorp
listener than sparse-dense
>mode.
>
>If I understand, both methods are Cisco
mechanisms to avoid the
>chicken-and-egg problem in Auto-RP environments.
>
>So the question again is, how to know which one to use in front of an
>ambiguous multicast scenario with auto-rp?
>
>Many thanks in advance.
>
>Manuel.
>
>
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