An octet string representing the concatenation of VINES IP header fields and VINES transport header fields required by this filter entry. Incoming packets will be bitwise ANDed with the value of ibmvFltMask, and if the result is equal to the value of this object, the packet will be filtered according to the value of ibmvFltValue. Fields from VINES IP and transport headers used for filtering: field length field name 8 BITS protocol type 4 BITS hop count 32 BITS destination network number 16 BITS destination subnetwork number 16 BITS destination port number 32 BITS source network number 16 BITS source subnetwork number 16 BITS source port number