Semantics of congestion reports
CM_PERSISTENT
- Persistent congestion (e.g., TCP timeouts)
- Causes CM to go back into slow start
CM_TRANSIENT: Transient congestion, e.g., three duplicate ACKs
CM_ECN: ECN echoed from receiver
Should we more precisely define when CM_PERSISTENT should be reported?
- E.g., no feedback for an entire RTT (“window”)