Alcatel Omni Switch/Router, User Manual

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Viewing TCP Statistics
Page 25-27
Viewing TCP Statistics
The
tcps
command is used to monitor TCP traffic activity and check TCP configuration param-
eters. To reconfigure TCP parameters, see Viewing the TCP Connection Table on page 25-29.
To display information about TCP activity, enter the following command:
tcps
A screen similar to the following displays:
TCP Statistics
Round Trip Algorithm Used : RSRE (MIL-STD-1778)
Retransmission Min/Max Timeout : 300/3000
Max Connections Allowed : Unlimited
Active Opens : 76
Passive Opens : 43
Attempt Fails : 0
Established Resets : 5
Currently Established : 3
Total Segments Received : 1117
Total Segments Sent : 832
Total Segments Retransmitted : 0
Total Segments Received w/err : 0
Total Segments Sent w/RST flag : 0
The fields on this screen have the following meanings:
Round Trip Algorithm Used
The algorithm used to determine the Timeout value used for retransmitting unacknowledged
octets. The value is: RSRE (MIL-STD-1778).
Retransmission Min/Max Timeout
The minimum/maximum value permitted by a TCP implementation for the retransmission
timeout, measured in milliseconds.
Max Connections Allowed
The maximum number of connections allowed. Currently, the number is unlimited.
Active Opens
The number of times TCP connections have made a direct transition to the “synSent” state
from the “closed” state (refer to RFC 973).
Passive Opens
The number of times TCP connections have made a direct transition to the “synReceived”
state from the “listen” state (refer to RFC 973).
Attempt Fails
The number of times TCP connections have made a direct transition to the “closed” state from
either the “synSent” state or the “synReceived” state, plus the number of times TCP connec-
tions have made a direct transition to the “listen” state from the “synReceived” state.