Mocomtech CIM-550 - Manual (Page 248)

CiM-550 IP Enabled Satellite Modem Rev. 2
SNMP interface CD/CIM550.IOM
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13.2.4 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 13-11. TCP Group OIDs
OID Description
tcpRtoAlgorithm Algorithm used to determine the timeout value used for
retransmitting unacknowledged octets. The cim550 uses Van
Jacobson's algorithm.
tcpRtoMin Minimum value permitted by a TCP implementation for the
retransmission timeout. The cim550 uses a minimum timeout of
1000 milliseconds.
tcpRtoMax Maximum value permitted by a TCP implementation for the
retransmission timeout. The cim550 uses a maximum timeout of
64000 milliseconds.
tcpMaxConn Limit on the total number of TCP connections the entity can
support. In the cim550, 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.