01 - MAY discard the packet, if so configured. Nodes should not
        rely on routers dropping these unrecognized Option Types.

   10 - MAY discard the packet, if so configured, regardless of
        whether or not the packet's Destination Address was a
        multicast address. If the packet was discarded, an ICMP
        Parameter Problem, Code 2, message MAY be sent to the 
        packet's Source Address, pointing to the unrecognized 
        Option Type.

   11 - MAY discard the packet, if so configured. If the packet
        was discarded and the packet's Destination Address was 
        not a multicast address, an ICMP Parameter Problem, 
        Code 2, message MAY be sent to the packet's Source 
        Address, pointing to the unrecognized Option Type.