ip mroute show [ [ to ] PREFIX ] [ from PREFIX ] [ iif DEVICE ] [ table TABLE_ID ]
mroute objects are multicast routing cache entries created by a user-level mrouting daemon (f.e. pimd or mrouted ).
Due to the limitations of the current interface to the multicast routing engine, it is impossible to change mroute objects administratively, so we can only display them. This limitation will be removed in the future.
Original Manpage by Michail Litvak <firstname.lastname@example.org>