Can a PIM domain run PIM-DM and PIM-SM simultaneously

A PIM Domain cannot run PIM-DM and PIM-SM simultaneously.

Since PIM Hello packets do not carry messages in PIM mode, a PIM switch cannot know the mode of the PIM protocol that its PIM neighbor runs. If the RPF interface and the RPF neighbor run PIM protocols of different modes, two neighboring devices cannot learn PIM routing information from each other. As a result, related multicast forwarding entries cannot be correctly created.

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