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Registry included below
Standards Action
Please see the published RFC, Section 23.2, for further information.
| Bit | Name | Reference |
|---|---|---|
| 7 | Reserved, previously used by Historic [RFC3540] as NS (Nonce Sum) | [RFC8311] |
| 8 | CWR (Congestion Window Reduced) | [RFC3168] |
| 9 | ECE (ECN-Echo) | [RFC3168] |