From: Ivan (ivan@iip.net)
Date: Thu Jul 20 2006 - 15:16:18 ART
Mtrace use special IGMP packet type (Queries and Response) AFAIR IGMP 1F and
1E. Requestor send packet to ther last-hop router. This router add some
usefull parameters such as IF, OF, input packet count, out packet count,
query time and many other. Then router send traceroute Request to the
next-hop (out to Input Interface for SPT or shared tree) and each hop add
same data to the packet. This packet extend as unicasts. At the end first-hop
router send IGMP Response to the requestor.
mtrace shows not all information. Very impressive drawing you can view from
"mstat".
> Hello group,
>
> Can someone point me to a link that has a good explanation of how the
> mtrace command works? Or perhaps explain how it works hop by hop?
>
> Thanks
>
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-- Ivan
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