A filter byte to narrow the data returned by the agent.
The number of possible flows can be extremely high. An SNMP walk
could take a significatn resources. Using a walk with a filter will narrow the
values returned to those flows matching the fields used in the index. Currently
only the first byte of this Integer is used.
This byte specifies one or more fields to compare flows in the system against the
index in the get-next request.
Big endian least significant Byte is encoding is as follows:
bit 0 : unused
bit 1 : Port Of Entry Filter mask
bit 2 : Src IP Address Filter mask
bit 3 : Dst IP Address Filter mask
bit 4 : Type Of Service Filter mask
bit 5 : Protocol Filter mask
bit 6 : Src port Filter mask
bit 7 : Dst port Filter mask
A complete walk of the mib will use the filter value of 0 as will a get Request