a3filterBuiltInMaskFieldValue 1.3.6.1.4.1.43.2.10.3.1.3

This object identifies the value that this Built In Mask looks for as well as the protocol field. Note, the way this table defines a Mask is different from the semantics of the User Mask table. In that table, Masks look for specific values in specific protocol fields. Built In Masks, however, are different. For example, one Built In Mask looks for the value ip(9) in the field dataLinkProtocol(2). Besides looking in the dataLinkProtocol field, the code that implements this mask also looks for IP in the proper SNAP field when the dataLinkProtocol field indicates SNAP.