What is the state of arts about multicast traceroute and ping, especially:

1) The fate of draft-ietf-idmr-traceroute-ipm?  Dead or became RFC?

2) Is the mtrace still useful in PIM-SM, PIM-SSM, etc?  Does most of router support mtrace?

3) Any multicast ping tool from receiver to source available?

Thanks.

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Weijing Chen