Requested revision
Standard: | IEEE Std 802.1CB-2017 | Clause: | 6.7 |
Clause title: | IP Stream identification |
Rationale for revision
The IP Stream Identification must be able to locate the IP Ethertype (0x0800/0x86DD) in the Frame in order to find Layer 3 (addresses) and Layer 4 (ports) matching parameters. If an R-Tag is present(Figure 8-3), this IP Ethertype is in a different position, than if not. The text of 6.7 and the managed objects (9.1.5) do not give any indication of how the IP Stream Identification should handle this case. How far back in the frame should the IP Stream Identification look for the IP Ethertype? Could there be other Tags present?
Proposed text
Add some text or even a configuration item giving some indication where the IP Ethertype is to be looked for by IP Stream Identification if (no) other tags (specifically the R-Tag from this standard) than the C-VLAN are present.
Impact on existing networks
Currently IP stream identification may not work properly with R-Tag present.
Originator
Name: | Max Turner | Email: | max.turner@ethernovia.com<mailto:max.turner@ethernovia.com> |
Affiliation: | Ethernovia, BMW, Ruetz System Solutions, Expleo | ||
Submitted: | 2022-08-18 |