Mocomtech CIM-550 13.2.4 TCP GROUP

CiM-550 IP Enabled Satellite Modem	Rev. 2
SNMP interface	CD/CIM550.IOM

13.2.4 TCP GROUP

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.

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