Identifies the type of intercept filter associated to this generic stream. The following types of streams are supported: ip: The specific filter is an IP filter with same indices as that of this table. The exact filter is a row in citapStreamTable of CISCO-IP-TAP-MIB. mac: The specific filter is a MAC filter with same indices as that of this table. The exact filter is a row in c8tapStreamTable of CISCO-802-TAP-MIB. userConnecton: The specific filter is a user connection filter with same indices as that of this table. The exact filter is a row in cuctTapStreamTable of CISCO-USER-CONNECTION-TAP-MIB. msPdsn: The specific filter is a Mobile Sub connection filter with same indices as that of this table. The exact filter is a row in ccptapStreamTable of CISCO-CDMA-PDSN-TAP-MIB. mobility: The specific filter is a Mobile Subscriber connection filter with same indices as that of this table. The exact filter is a row in cmtapStreamTable of CISCO-MOBILITY-TAP-MIB.