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  1. Maintenance Items
  2. 0258
  3. Request
Requested revision
Standard:802.1CB-2017Clause:7.4.3.3
Clause title:SequenceRecoveryReset
Rationale for revision
The reset function for the Sequence recovery function defined in 802.1CB-2017 may cause temporary duplicate delivery in some cases. Duplicate delivery (even temporarily) is not acceptable for TSN networks as it breaks one of the basic design rules, namely a TSN Stream is not allowed to consume more than the resources reserved for it. Consuming more that the designated resources via duplicate delivery may cause violation of QoS requirements for some of the Streams, e.g., delay or loss violation.
Proposed text
Text changes need further discussions. Contribution (http://www.ieee802.org/1/files/public/docs2020/maint-varga-FRER-sequence-recovery-reset-0320-v01.pdf) proposes two possible solutions for the issue.
Impact on existing networks
Duplicate delivery may occur after reset if not fixed.
Originator
Name:Balázs VargaEmail:balazs.a.varga@ericsson.com<mailto:balazs.a.varga@ericsson.com>
Affiliation:Ericsson
Submitted:2020-03-16