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Requested revision
Standard:IEEE 802.1CBcv-2021Clause:12.6.1.2
Clause title:YANG data scheme definition for ieee802-dot1cb-frer YANG module
Rationale for revision
IEEE 802.1CS-2017 defines the Stream split table in 10.6 as:
There is one Stream split table per system, with one frerSplitEntry (10.6.1) per Stream splitting function (7.7) per set of stream_handle values.

In the FRER MIB this is correctly realized as ieee8021FrerStreamSplitTable, which allows multiple entries indexed by ieee8021FrerStreamSplitIndex.
Each entry in the Stream split table specifies a port (10.6.1.1) on which an instance of the Stream splitting function (7.7) is to be instantiated, and the lists of input and output stream_handles specifying the split operation.

However, in the FRER YANG module the Stream split table is realized as stream-split list, which uses port and direction-out-facing as index.
This definition does not reflect the definition of the Stream split table in 10.6 of IEEE 802.1CS-2017.
With this definition only a single Stream can be split at an end system port.
Controllers in industrial automation can require splitting of up to 512 streams at a single port.
Proposed text
The following definition of a stream-split-table could solve the problem:
+--rw stream-split-table* [stream-split-index]
|  +--rw stream-split-index integer
|  +--rw port if:interface-ref
|  +--rw direction-out-facing dot1cb-sid-types:direction
|  +--rw input-id*  -> /dot1cb-sid:stream-identity/handle
|  +--rw output-id* -> /dot1cb-sid:stream-identity/handle
Impact on existing networks
It becomes possible to configure with Netconf/YANG more than one Stream splitting function per port and direction-out-facing (as is possible with SNMP/MIB).
Originator
Name:Josef DorrEmail:josef.dorr@siemens.com
Affiliation:Siemens AG
Submitted:2023-08-02