...
| Warning |
|---|
ECN marking mechanism requires the respective Tx queues to use shared buffers (use-shared-buffers=yes) and WRED (wred=yes). |
The packet receives the CE mark if all conditions below are met:
- The packet is either IPv4 or IPv6.
- The ECN field value in IP header is either ECT(1) or ECT(0).
- Egress port's Tx Manager has ecn=yes.
- The assigned Tx Queue uses shared buffers (use-shared-buffers=yes).
- The assigned Tx Queue has WRED enabled (wred=yes).
- The Tx Queue detects congestion via WRED threshold.
...