Multicast beacon

 dbeacon is a multicast beacon: its main purpose is to monitor other beacons'
 reachability and collect statistics such as loss, delay and jitter between
 them.
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 dbeacon supports both IPv4 and IPv6 multicast, collecting information using
 both Any Source Multicast (ASM) and Source-Specific Multicast (SSM).
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 This package also includes dbeacon matrix, a Perl script to generate beacon
 reachability matrices in HTML.