1. Maintenance Items
  2. 0326
  3. Request
Requested revision
Standard:IEEE 802.1BA-2011Clause:6.7
Clause title:Basic support for streams
Rationale for revision
In comment resolution for P802.1AS amendments, there is consensus to change the
IntervalSetting state machines from mandatory to optional. For example, refer
to the Response for 802-1ASdm-d0-2 comment #128.

Since products in existing audio/video (AVB) networks rely on implementation
of the IntervalSetting state machines, there is also consensus that
those state machines need to be made mandatory in 802.1BA prior to 
publication as optional in 802.1AS.
Proposed text
Insert the following item at the end of the requirements list of 6.7.1,
renumbering as appropriate:
"g) All Ports shall support the following state machines in IEEE Std 802.1AS:
AnnounceIntervalSetting, SyncIntervalSetting, GptpCapableIntervalSetting,
LinkDelayIntervalSetting."

Insert the following item at the end of the requirements list of 6.7.2, 
renumbering as appropriate:
"e) All Ports shall support the following state machines in IEEE Std 802.1AS:
AnnounceIntervalSetting, SyncIntervalSetting, GptpCapableIntervalSetting,
LinkDelayIntervalSetting."

Insert the following item at the end of the requirements list of 6.7.3, 
renumbering as appropriate:
"f) All Ports shall support the following state machines in IEEE Std 802.1AS:
AnnounceIntervalSetting, SyncIntervalSetting, GptpCapableIntervalSetting,
LinkDelayIntervalSetting."

Insert a row in the PCS table of 7.4.6.3:
"B-AS-7   Does the implementation support the IntervalSetting state machines of gPTP?   M   6.7.1, AS   Yes []"

Insert a row in the PCS table of 7.4.7.3:
"T-AS-3   Does the implementation support the IntervalSetting state machines of gPTP?   M   6.7.2, AS   Yes []"

Insert a row in the PCS table of 7.4.8.3:
"L-AS-2   Does the implementation support the IntervalSetting state machines of gPTP?   M   6.7.3, AS   Yes []"
Impact on existing networks
The goal of this item is to avoid impact on existing AVB networks.
Originator
Name:Rodney CummingsEmail:Rodney.Cummings@ni.com
Affiliation:National Instruments (NI)
Submitted:2021-05-17