Very basic qs - How multcast ping choose the source interface

From: backbone systems (backbone.systems@gmail.com)
Date: Mon Dec 31 2007 - 11:36:15 ARST


Hey,

sorry for this basic question . on a router if i have 3 ethernet and 1 loop
back interface with sparse-mode enabled. When i ping from the serial
interface across the FR cloud
how does the multicast choose the source interface.

when i do debug ip mpacket i can see for different ping chooses different
ether/lo interfaces

What is the logic?

BB



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