EMC Connectrix ED-64M, User Manual

Page: 238 / 476

A
A-22
Connectrix ED-64M User Guide
Using SNMP to Manage the Switch
The TCP Group Note that 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 A-11
TCP Group Table
MIB-2 Object
Name
Type Access Description
tcpRtoAlgorithm INTEGER R The algorithm used to determine the timeout value used for retransmitting
unacknowledged octets.
Values:
other(1) — none of the following
constant(2) — a constant rto
rsre(3) — MIL-STD-1778, Appendix B
vanj(4) — Van Jacobson's algorithm [10]
tcpRtoMin INTEGER R The minimum value permitted by a TCP implementation for the retransmission
timeout, measured in milliseconds. More refined semantics for objects of this type
depend upon the algorithm used to determine the retransmission timeout. In
particular, when the timeout algorithm is rsre(3), an object of this type has the
semantics of the LBOUND quantity described in RFC 793.
tcpRtoMax INTEGER R The maximum value permitted by a TCP implementation for the retransmission
timeout, measured in milliseconds. More refined semantics for objects of this type
depend upon the algorithm used to determine the retransmission timeout. In
particular, when the timeout algorithm is rsre(3), an object of this type has the
semantics of the UBOUND quantity described in RFC 793.
tcpMaxConn INTEGER R The limit on the total number of TCP connections the entity can support. In entities
where the maximum number of connections is dynamic, this object should contain
the value -1.
tcpActiveOpens Counter R The number of times TCP connections have made a direct transition to the
SYN-SENT state from the CLOSED state.
tcpPassiveOpens Counter R The number of times TCP connections have made a direct transition to the
SYN-RCVD state from the LISTEN state.
tcpAttemptFails Counter R The 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 Counter R The 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 Gauge R The number of TCP connections for which the current state is either ESTABLISHED
or CLOSE- WAIT.