tIPFilterParamsFwdSapEncapVal specifies the sap port encap value
of the destination SAP for this IP filter entry.
A value different from 0 can only be specified if the value of the
tIPFilterParamsAction object of this entry is 'forward'. In addition
a non-zero value can only be given if the object
tIPFilterParamsFwdSdpBind has a zero value. A value of 0 indicates
that either
1) the sap encapsulation value is not specified when
tIPFilterParamsFwdSapPortId and tIPFilterParamsFwdSvcId
have valid values; or
2) that there is no SAP destination.