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mtracebis - Man Page

a multicast trace client


mtracebis [-h] [-v]

mtracebis <multicast source> [<multicast group>]


mtracebis is a program for initiating multicast traceroute, or "mtrace", queries.

It can initiate two types of mtrace queries: weak and group.

Weak tests whether the interfaces towards the source are multicast enabled and is initiated by supplying only the multicast source address.

Group tests whether there is multicast routing protocol state for particular multicast group and is initiated by supplying mutlicast source and group.

The first query sent is a full query, capable of crossing the network all the way to the source. If this fails, hop-by-hop queries are initiated.

Hop-by-hop queries start by requesting only a response from the nearest router. Following that, next query is extended to the next two routers, and so on... until a set of routers is tested for connectivity.



The default location of the mtracebis binary.


This man page is intended to be a quick reference for command line options. The definitive document is the info file frr 9.1 or the documentation available on the project website at https://frrouting.org/.


The daemon may log to standard output, to a VTY, to a log file, or through syslog to the system logs. FRR supports many debugging options, see the Info file, web docs or source for details.

See Also

frr-zebra(8), vtysh(1), frr-ripd(8), frr-ripngd(8), frr-ospfd(8), frr-ospf6d(8), frr-bgpd(8), frr-isisd(8), frr-babeld(8), frr-nhrpd(8), frr-pimd(8), frr-pbrd(8), frr-ldpd(8), frr-eigrpd(8), frr-staticd(8), frr-fabricd(8), frr-vrrpd(8), mtracebis(8) https://frrouting.org/


FRR eats bugs for breakfast. If you have food for the maintainers, please email <dev@lists.frrouting.org>.


Mladen Sablic

Referenced By

frr(1), frr-bfdd(8), frr-bgpd(8), frr-eigrpd(8), frr-isisd(8), frr-nhrpd(8), frr-ospf6d(8), frr-ospfd(8), frr-pbrd(8), frr-pimd(8), frr-ripd(8), frr-ripngd(8), frr-staticd(8), frr-vrrpd(8), frr-watchfrr(8), frr-zebra(8), vtysh(1).

Apr 17, 2024 9.1 FRR