The value of vRiaInetEui64 specifies whether the
vRiaInetOperAddress is an eui64 address. This object
can only be set at creation time.
When vRiaInetEui64 is 'true', then the vRiaInetOperAddress
is derived from the vRiaInetAddress and the physical address
of the interface this address is attached to. vRiaInetAddress
has to have all zeros the least significant 8 bytes. Also,
vRiaInetPrefixLen cannot be longer than 64.
When vRiaInetEui64 is 'false', then the vRiaInetOperAddress
is a copy of vRiaInetAddress. The value is always 'false' when
vRiaInetAddressType is not 'ipv6'.