• Linus Lüssing's avatar
    bridge: Snoop Multicast Router Advertisements · 4b3087c7
    Linus Lüssing authored
    When multiple multicast routers are present in a broadcast domain then
    only one of them will be detectable via IGMP/MLD query snooping. The
    multicast router with the lowest IP address will become the selected and
    active querier while all other multicast routers will then refrain from
    sending queries.
    
    To detect such rather silent multicast routers, too, RFC4286
    ("Multicast Router Discovery") provides a standardized protocol to
    detect multicast routers for multicast snooping switches.
    
    This patch implements the necessary MRD Advertisement message parsing
    and after successful processing adds such routers to the internal
    multicast router list.
    Signed-off-by: default avatarLinus Lüssing <linus.luessing@c0d3.blue>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    4b3087c7
mcast_snoop.c 4.87 KB