Table 8.1, “JavaScript terms available for filters” describes the terms that can be used in filters. These terms must be formed into filter expressions, as described in Section 8.1, “Advanced use of filters”. The table also specifies the type of each term. You should be careful to only combine terms of the correct type together, using the normal rules for JavaScript.

Three additional JavaScript functions are required to be able to access the destination interface of a packet. These are required because a packet may have multiple destination interfaces, in the case of a broadcast or multicast, and so a simple term is inadequate. The two functions available are described in Table 8.2, “JavaScript functions for filtering on destination interfaces”. To use these functions, add them to a filter, with the parameter to the function being the destination interface you want to test for. For example, to filter on destination interface 49, use destIfIndexInclude(49) for the filter.