Change:
The Time-Sensitive Networking (TSN) Task Group of the IEEE 802.1 Working Group have defined (and are defining) a number of amendments to IEEE8021Q that provide zero congestion loss and bounded latency in <del> bridged networks.  Furthermore IEEE8021CB defines frame replication </del> <ins> bridged networks.  Furthermore, IEEE8021CB defines frame replication </ins> and elimination functions for reliability that should prove both compatible with and useful to DetNet networks.  All these functions have to identify flows that require TSN treatment. TSN capabilities of the TSN sub-network are made available for IP <del> (DetNet) flows via the protocol interworking function defined in IEEE8021CB.  For example, applied on the TSN edge port it can convert an ingress unicast IP (DetNet) flow to use a specific Layer-2 multicast destination MAC address and a VLAN, in order to direct the packet through a specific path inside the bridged network.  A similar interworking function pair at the other end of the TSN sub-network would restore the packet to its original Layer-2 destination MAC address and VLAN. </del> <ins> (DetNet) flows via the protocol interworking function desribed in Annex C.5 of IEEE8021CB.  For example, applied on the TSN edge port it can convert an ingress unicast IP (DetNet) flow to use a specific Layer-2 multicast destination MAC address and a VLAN, in order to direct the packet through a specific path inside the bridged network. A similar interworking function pair at the other end of the TSN sub- network would restore the packet to its original Layer-2 destination MAC address and VLAN. </ins> Placement of TSN functions depends on the TSN capabilities of nodes. IP (DetNet) Nodes may or may not support TSN functions.  For a given <del> TSN Stream (i.e., DetNet flow) an IP (DetNet) node is treated as a Talker or a Listener inside the TSN sub-network. </del> <ins> TSN Stream (i.e., a mapped DetNet flow) an IP (DetNet) node is treated as a Talker or a Listener inside the TSN sub-network. </ins> 4.1. Mapping of a DetNet IP flow to a TSN Stream is provided via the combination of a passive and an active stream identification function <del> that operate at the frame level.  The passive stream identification function is used to catch the 6-tuple of a DetNet IP flow and the active stream identification function is used to modify the Ethernet header according to ID of the mapped TSN Stream. IEEE8021CB defines an IP Stream identification function that can be used as a passive function for IP DetNet flows using UDP or TCP. IEEEP8021CBdb defines a Mask-and-Match Stream identification function that can be used as a passive function for any IP DetNet flows. IEEE8021CB defines an Active Destination MAC and VLAN Stream identification function, what can replace some Ethernet header fields namely (1) the destination MAC-address, (2) the VLAN-ID and (3) priority parameters with alternate values.  Replacement is provided for the frame passed down the stack from the upper layers or up the stack from the lower layers. </del> <ins> that operate at the frame level (Layer-2).  The passive stream identification function is used to catch the 6-tuple of a DetNet IP flow and the active stream identification function is used to modify the Ethernet header according to the ID of the mapped TSN Stream. Clause 6.7 of IEEE8021CB defines an IP Stream identification function that can be used as a passive function for IP DetNet flows using UDP or TCP.  Clause 6.8 of IEEEP8021CBdb defines a Mask-and-Match Stream identification function that can be used as a passive function for any IP DetNet flows. Clause 6.6 of IEEE8021CB defines an Active Destination MAC and VLAN Stream identification function, what can replace some Ethernet header fields namely (1) the destination MAC-address, (2) the VLAN-ID and (3) priority parameters with alternate values.  Replacement is provided for the frame passed down the stack from the upper layers or up the stack from the lower layers. </ins> Active Destination MAC and VLAN Stream identification can be used within a Talker to set flow identity or a Listener to recover the

Discussion:
Fixing conformance language Adding more definite references for TSN functions (i.e., Clause numbers)