tIPv6FilterParamsFwdSapEncapVal specifies the sap port encap value
of the destination SAP for this filter entry.
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 has value '0'. The value 0 indicates
that either
1) the sap encapsulation value is not specified when
tIPv6FilterParamsFwdSapPortId and tIPv6FilterParamsFwdSvcId
have valid values; or
2) that there is no SAP destination.