SG300 Cannot add IPv6 address on the interface- the maximum number of addresses 3 has already been used.

[phibertron]

First I ran into this brick wall on the number of IPv6 interfaces

SG300 Cannot enable IPv6 on the interface - the maximum number of interfaces 3 has already been used.

Also, it appears that there is no IPV6 routing in Layer 3 mode

SG300 L3 IPv6 routing does NOT work

And now this, I cant use more than 3 IPv6 addresses