Stream Identification

The identification of IEEE 802.1CB streams relies on the use of the existing type 2 screener functionality. Each type 2 screener can be configured to inspect various fields of the receive frame and compared against values programmed into the type 2 screeners and compare registers.

For each implemented IEEE 802.1CB stream function, its associated control register contains the two fields ‘member_stream_1’ and ‘member_stream_2’:

• Each contains a value between 0x0 and 0xf representing the type 2 screener associated with this stream
• Each may point to the same or different type 2 screeners providing the option to eliminate packets which may have been sent across two different paths using different VLAN ID for example.