[JL] Quite true: each network tends to use DSCP marks on a private/internal basis and so will bleach the DSCP marks on ingress from peers. This will, however, change with the upcoming IETF RFC on Non-Queue-Building (NQB) Per Hop Behavior - https://datatracker.ietf.org/doc/html/draft-ietf-tsvwg-nqb. And I can report that we at Comcast now permit DSCP-45 inbound for NQB packets, in case developers would like to experiment with this (we just finished updating router configs last week for residential users on DOCSIS; FTTP and commercial are still in process).
iperf 2 now supports a --dscp option as a convenience (vs setting the --tos byte.) I can confirm --dscp 45 is being passed over my xfinity hop to my linodes (now Akamai) servers in both directions at multiple colo locations.
The --dscp is in the master branch. https://sourceforge.net/p/iperf2/code/ci/master/tree/ Older versions require --tos and setting the byte, e.g. 180
Bob _______________________________________________ Nnagain mailing list [email protected] https://lists.bufferbloat.net/listinfo/nnagain
