Requested revision
Standard:802.1CB-2017Clause:6
Clause title:Stream identification
Rationale for revision
The NOTE on page 26 incorrectly states that all stream identification methods (i.e. 6.4, 6.5, 6.6, 6.7) are required. * Stream identification method 6.4 (NULL Stream) is required (SHALL) as per 5.3, 5.6, 5.9, and 5.12. * Method 6.5 (Source MAC & VLAN) is not mentioned anywhere in clause 5 or its subclauses. Should it be? * Method 6.6 (Active Destination MAC/VLAN) is recommended (SHOULD) as per 5.4, 5.7, 5.10, and 5.13. * Method 6.7 (IP Stream) is optional (MAY) as per 5.5,5.8, 5.11; but recommended in 5.13 (relay systems). Remove the word "required" from the NOTE.
Proposed text
Replace second sentence of NOTE with "Several methods are specified in the following subclauses (6.4, 6.5, 6.6, 6.7)." A second change would be to add references to 6.5 (Source MAC & VLAN) to the same subclauses in clause 5 as we find the recommended (SHOULD) references to 6.6 (Active Dest MAC/VLAN).
Impact on existing networks
Implementations created before this change might support all Stream identification methods based on this NOTE, which is acceptable according to clause 5. Relaxing the requirements in this (informative) NOTE brings the NOTE in line with clause 5 Conformance requirements.
Originator
Name:Craig GuntherEmail:craiggunther@yahoo.com
Affiliation:Craig Gunther Consulting, LLC
Submitted:2019-01-28