From: Asim Khan (asimmegawatt@xxxxxxxxx)
Date: Wed Aug 07 2002 - 05:17:26 GMT-3
Ted,
PIM(DM) does have Designated Router, if you are
running IGMP version 1. The protocol itself doesn't
need a DR. IGMP Version 1 has no querier election
process and it relies on the IP multicast routing
protocol to elect a DR on the subnet. The role of the
PIM designated router is to manage IGMP queries.
IGMP version 2 has querier election process.
Regards.
Asim Khan
--- Ted McDermott <tedmcdermott@yahoo.com> wrote:
> David Hucabi, in his book, CCNP Switching, states on
> page 376, "No designated router exists when running
> PIM in dense mode." However, on the next page, 377,
> there is an illustration, Example 11-1, of "show ip
> pim neighbor", which shows one neighbor with dense
> mode as a designated router. Isn't this a
> contradiction?
>
> What is the true answer? Can you have a DR with PIM
> dense mode, or not?
>
> Thanks,
>
> Ted
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