From: Linus Lüssing <linus.luessing@xxxxxxxxx> Date: Fri, 3 Feb 2017 08:11:03 +0100 > When for instance a mobile Linux device roams from one access point to > another with both APs sharing the same broadcast domain and a > multicast snooping switch in between: > > 1) (c) <~~~> (AP1) <--[SSW]--> (AP2) > > 2) (AP1) <--[SSW]--> (AP2) <~~~> (c) > > Then currently IPv6 multicast packets will get lost for (c) until an > MLD Querier sends its next query message. The packet loss occurs > because upon roaming the Linux host so far stayed silent regarding > MLD and the snooping switch will therefore be unaware of the > multicast topology change for a while. > > This patch fixes this by always resending MLD reports when an interface > change happens, for instance from NO-CARRIER to CARRIER state. > > Signed-off-by: Linus Lüssing <linus.luessing@xxxxxxxxx> Looks good to me, applied, thanks.
