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RFC 793, "Transmission Control Protocol", September 1981

Note: This RFC has been obsoleted by RFC 9293

Note: This RFC has been updated by RFC 1122, RFC 3168, RFC 6093, RFC 6528

Source of RFC: Legacy
Area Assignment: tsv

Errata ID: 6222
Status: Held for Document Update
Type: Editorial
Publication Format(s) : TEXT
Reported By: Charles Deng
Date Reported: 2020-07-06
Held for Document Update by: Martin Duke
Date Held: 2020-07-07

Section 3.4 says: 

  7.  SYN-SENT    <-- <SEQ=400><ACK=101><CTL=SYN,ACK>  <-- SYN-RECEIVED

  8.  ESTABLISHED --> <SEQ=101><ACK=401><CTL=ACK>      --> ESTABLISHED

                    Recovery from Old Duplicate SYN

                               Figure 9.

It should say:

  7.  ESTABLISHED <-- <SEQ=400><ACK=101><CTL=SYN,ACK>  <-- SYN-RECEIVED

  8.  ESTABLISHED --> <SEQ=101><ACK=401><CTL=ACK>      --> ESTABLISHED

                    Recovery from Old Duplicate SYN

                               Figure 9.

Notes:

To align with figure 7 in the same section, after TCP A get the SYN+ACK from TCP B, TCP A should enter ESTABLISHED state instead stay in SYN-SENT state.

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