Comtech EF Data CDM-IP 300L - Manual (Page 247)

CDM-IP 300L IP-Centric Satellite Modem Rev. 1
CD/CDMIP300L.IOM
221
8.3.4 TCP G
ROUP
This group contains statistics and control parameters for the TCP protocol. This group
contains a table describing the current TCP connections.
Note: The instances of object types that represent information about a particular TCP connection
are transient; they persist only as long as the connection in question.
Table 29. TCP Group OIDs
OID Description
tcpRtoAlgorithm Algorithm used to determine the timeout value used for
retransmitting unacknowledged octets. The CDM-IP300L uses
Van Jacobson's algorithm.
tcpRtoMin Minimum value permitted by a TCP implementation for the
retransmission timeout. The CDM-IP300L uses a minimum
timeout of 1000 milliseconds.
tcpRtoMax Maximum value permitted by a TCP implementation for the
retransmission timeout. The CDM-IP300L uses a maximum
timeout of 64000 milliseconds.
tcpMaxConn Limit on the total number of TCP connections the entity can
support. In the CDM-IP300L, the maximum number of
connections is dynamic so a value of –1 is returned.
tcpActiveOpens Number of times TCP connections have made a direct transition to
the SYN-SENT state from the CLOSED state.
tcpPassiveOpens Number of times TCP connections have made a direct transition to
the SYN-RCVD state from the LISTEN state.
tcpAttemptFails Number of times TCP connections have made a direct transition to
the CLOSED state from either the SYN-SENT state or the SYN-
RCVD state, plus the number of times TCP connections have
made a direct transition to the LISTEN state from the SYN-RCVD
state.
tcpEstabResets Number of times TCP connections have made a direct transition to
the CLOSED state from either the ESTABLISHED state or the
CLOSE-WAIT state.
tcpCurrEstab Number of TCP connections for which the current state is either
ESTABLISHED or CLOSE-WAIT.
tcpInSegs Total number of segments received.
tcpOutSegs Total number of segments sent.
tcpRetransSegs Total number of segments retransmitted – that is, the number of
TCP segments transmitted containing one or more previously
transmitted octets.