15.3.11.1.2 Filter n Command
The 4-bit Filter n Command field controls the Filter n operation in the following way:
- Filter n Command Bit 3 specifies the address type of the pattern. When the bit is set, the pattern applies to only multicast frames; when the bit is reset, the pattern applies only to unicast frame.
- Filter n Command Bit 2 and Bit 1 are reserved.
- Filter n Command Bit 0 is the enable for Filter n. If bit 0 is not set, filter n is disabled.