From: Edward Cree
Date: Tue, 4 Apr 2017 17:02:49 +0100
> If the mc_list is longer than 256 addresses, we enter mc_promisc mode.
> If we're in mc_promisc mode and the firmware doesn't support cascaded
> multicast, normally we also insert our mc_list, to prevent stealing by
> another VI. However
If the mc_list is longer than 256 addresses, we enter mc_promisc mode.
If we're in mc_promisc mode and the firmware doesn't support cascaded
multicast, normally we also insert our mc_list, to prevent stealing by
another VI. However, if the mc_list was too long, this isn't really
helpful - the M