# TCP Statistics

## Navigation

1. Right-click on the Persistent Storage Device (PSD) card and then select PSD Details.

2. In the contents pane, double-click on the Statistics folder and then select TCP Statistics.

From the TCP Statistics dialog box, you can evaluate the performance of this system by monitoring TCP traffic activity.

This dialog box displays the following data:

- Active Opens (tcpActiveOpens)

- Passive Opens (tcpPassiveOpens)

- Attempt Fails (tcpAttemptFails)

- Estab Resets (tcpEstabResets)

- Curr Estab (tcpCurrEstab)

- Out Rsts (tcpOutRsts)

- In Segs (tcpInSegs)

- Out Segs (tcpOutSegs)

- Retransmitted Segs (tcpRetransSegs)

To monitor these objects in real time, click Monitor.

Active Opens (tcpActiveOpens)

Number of times TCP connections have made a direct transition to the SYN-SENT state from the CLOSED state.

Passive Opens (tcpPassiveOpens)

Number of times TCP connections have made a direct transition to the SYN-RCVD state from the LISTEN state.

Attempt Fails (tcpAttemptFails)

Number of times TCP connections have made a direct transition to the CLOSED state from either the SYN-SENT or SYN-RCVD state, plus the number of times TCP connections have made a direct transition to the LISTEN state from the SYN-RCVD state.

Estab Resets (tcpEstabResets)

Number of times TCP connections have made a direct transition to the CLOSED state from either the ESTABLISHED or CLOSE-WAIT state.

Curr Estab (tcpCurrEstab)

Number of TCP connections currently in the ESTABLISHED or CLOSE-WAIT state.

Out Rsts (tcpOutRsts)

Number of TCP segments sent which contain the RST flag.

In Segs (tcpInSegs)

Total number of segments received, including those received in error. This count includes segments received on established connections.

Out Segs (tcpOutSegs)

Total number of segments sent, including those on current connections, but excluding those containing only retransmitted octets.

Retransmitted Segs (tcpRetransSegs)

Number of transmitted TCP segments containing one or more previously transmitted octets.