nsis-11----Page:9
1 2 3 4 5 6 7 8 9 10 11 12
|
ECN for real-time traffic draft-babiarz-tsvwg-rtecn-03 Advantages Can be used for real-time, rate based measurement DSCP remarking is not needed (but there are open issues) Problems Not standard yet Terminating/preempting the required number of flows is difficult (no indication of the per flow congestion percentage) Cannot be used for elastic traffic How to distinguish between end-to-end and edge-to-edge ENC marked packets? Open issues (raised in TSVWG): Additional DSCPs may be needed to separate traffic (sharing the same PHB but) using or not using ECN If a router is not Diffserv aware, how to separate ECN 3168 and rt ECN |