The value of tmnxCcIpv6FltrDestinationIpMask specifies the IP Mask value
for this policy IPv6 Filter entry. The mask is ANDed with the received
destination IP address to match the tmnxCcIpv6FltrDestinationIpAddr.
The default value of 0 disables matching on the destination IP address.
This field can only be set if the value of tmnxCcIpv6FltrDirection is set
to ingress.