tIPv6FilterParamsFwdSapPortId specifies the sap port id of the
destination for this filter entry.
The value 0 indicates that there is no SAP destination
defined. A value different from 0 can only be specified if the value
of the tIPv6FilterParamsAction object of this entry is 'forward'.
In addition a non-zero value can only be given if the object
tIPv6FilterParamsFwdSdpBind is '0'.