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Requested revision
Standard:IEEE Std 802.1Q-2018Clause:17.7.1
Clause title:Definitions for the IEEE8021-TC-MIB module
Rationale for revision
The TC MIB defines a TEXTUAL-CONVENTION "IEEE8021PriorityCodePoint". The syntax of this TC is needed by the MIBs that control the priority encoding table (see 6.9.3). But the name of the TC is unfortunate, because a "Priority Code Point" in IEEE 802.1Q (see 6.9.3, in particular) is the 3-bit value encoded in a VLAN tag. The syntax of the TC IEEE8021PriorityCodePoint is not, in fact, a Priority Code Point, but is a an enumeration specifying which of the four mappings specified in Table 6-2 or Table 6-3 is to be used when mapping priority values. This misnaming caused an error (corrected in IEEE P802.1Qcw) in the SRP MIB that used the textual convention "IEEE8021PriorityCodePoint" for an object that was, in fact, supposed to contain a Priority Code Point, not a 4-value enumeration.
Proposed text
Change the name of IEEE8021PriorityCodePoint to IEEE8021PriortyMapping, in all places (except its incorrect use by ieee8021SrpStreamDataFramePriority, which is being addressed in comments on P802.1Qcw).
Impact on existing networks
There should be none. No MIB outside 802.1Q is known to reference this TC.
Originator
Name:Norman FinnEmail:nfinn@nfinnconsulting.com
Affiliation:Huawei
Submitted:2020-11-16