Multiple vendors' IPv6 issues

[bms at fastmail.net (Bruce Simpson)]

On 27/05/2015 20:35, Brian Rak wrote:
>
> You don't need full promisc mode, just the (poorly documented) 
> allmulticast option (ip link set dev $macvtap allmulticast on)

...And poorly supported on some real hardware (notably Wi-Fi adapters), 
where the hash filter on each NIC's MAC is not guaranteed to support 
"ALLMULTI".

It's a prerequisite for software multicast forwarding, and, it might be 
argued, a good litmus test for IPv6 readiness.