IF (Upper-layer Header is IPv4 or IPv6) and 
    local configuration permits {
  Perform IPv6 decapsulation 
  Resubmit the decapsulated packet to the IPv4 or IPv6 module
}
ELSE {   
  Send an ICMP parameter problem message to the Source Address and
  discard the packet.  Error code (4) "SR Upper-layer 
  Header Error", pointer set to the offset of the upper-layer 
  header.
}