RFC 1158
Management Information Base for network management of TCP/IP-based internets: MIB-II
5.6. The TCP Group Implementation of the TCP group is mandatory for all systems that implement the TCP. 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. OBJECT: ------- tcpRtoAlgorithm { tcp 1 } Syntax: INTEGER { other(1), -- none of the following constant(2), -- a constant rto rsre(3), -- MIL-STD-1778, Appendix B vanj(4) -- Van Jacobson's algorithm [11] } Definition: The algorithm used to determine the timeout value used for retransmitting unacknowledged octets. Access: read-only. Status: mandatory.
OBJECT:
-------
tcpRtoMin { tcp 2 }
Syntax:
INTEGER
Definition:
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.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpRtoMax { tcp 3 }
Syntax:
INTEGER
Definition:
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.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpMaxConn { tcp 4 }
Syntax:
INTEGER
Definition:
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".
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpActiveOpens { tcp 5 }
Syntax:
Counter
Definition:
The number of times TCP connections have made a direct
transition to the SYN-SENT state from the CLOSED state.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpPassiveOpens { tcp 6 }
Syntax:
Counter
Definition:
The number of times TCP connections have made a direct
transition to the SYN-RCVD state from the LISTEN state.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpAttemptFails { tcp 7 }
Syntax:
Counter
Definition:
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.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpEstabResets { tcp 8 }
Syntax:
Counter
Definition:
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.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpCurrEstab { tcp 9 }
Syntax:
Gauge
Definition:
The number of TCP connections for which the current state
is either ESTABLISHED or CLOSE-WAIT.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpInSegs { tcp 10 }
Syntax:
Counter
Definition:
The total number of segments received, including those
received in error. This count includes segments received
on currently established connections.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpOutSegs { tcp 11 }
Syntax:
Counter
Definition:
The total number of segments sent, including those on
current connections but excluding those containing only
retransmitted octets.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpRetransSegs { tcp 12 }
Syntax:
Counter
Definition:
The total number of segments retransmitted - that is, the
number of TCP segments transmitted containing one or more
previously transmitted octets.
Access:
read-only.
Status:
mandatory.
5.6.1. The TCP Connection table
The TCP connection table contains information about this entity's
existing TCP connections.
OBJECT:
-------
tcpConnTable { tcp 13 }
Syntax:
SEQUENCE OF TcpConnEntry
Definition:
A table containing TCP connection-specific information.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpConnEntry { tcpConnTable 1 }
Syntax:
TcpConnEntry ::= SEQUENCE {
tcpConnState
INTEGER,
tcpConnLocalAddress
IpAddress,
tcpConnLocalPort
INTEGER (0..65535),
tcpConnRemAddress
IpAddress,
tcpConnRemPort
INTEGER (0..65535)
}
Definition:
Information about a particular current TCP connection.
An object of this type is transient, in that it ceases to
exist when (or soon after) the connection makes the
transition to the CLOSED state.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpConnState { tcpConnEntry 1 }
Syntax:
INTEGER {
closed(1),
listen(2),
synSent(3),
synReceived(4),
established(5),
finWait1(6),
finWait2(7),
closeWait(8),
lastAck(9),
closing(10),
timeWait(11)
}
Definition:
The state of this TCP connection.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpConnLocalAddress { tcpConnEntry 2 }
Syntax:
IpAddress
Definition:
The local IP address for this TCP connection. In the
case of a connection in the listen state which is willing
to accept connections for any IP interface associated
with the node, the value 0.0.0.0 is used.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpConnLocalPort { tcpConnEntry 3 }
Syntax:
INTEGER (0..65535)
Definition:
The local port number for this TCP connection.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpConnRemAddress { tcpConnEntry 4 }
Syntax:
IpAddress
Definition:
The remote IP address for this TCP connection.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpConnRemPort { tcpConnEntry 5 }
Syntax:
INTEGER (0..65535)
Definition:
The remote port number for this TCP connection.
Access:
read-only.
Status:
mandatory.
5.6.2. Additional TCP Objects
OBJECT:
-------
tcpInErrs { tcp 14 }
Syntax:
Counter
Definition:
The total number of segments received in error (e.g., bad
TCP checksums).
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpOutRsts { tcp 15 }
Syntax:
Counter
Definition:
The number of TCP segments sent containing the RST flag.
Access:
read-only.
Status:
mandatory.
5.7. The UDP Group
Implementation of the UDP group is mandatory for all systems which
implement the UDP.
OBJECT:
-------
udpInDatagrams { udp 1 }
Syntax:
Counter
Definition:
The total number of UDP datagrams delivered to UDP users.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
udpNoPorts { udp 2 }
Syntax:
Counter
Definition:
The total number of received UDP datagrams for which
there was no application at the destination port.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
udpInErrors { udp 3 }
Syntax:
Counter
Definition:
The number of received UDP datagrams that could not be
delivered for reasons other than the lack of an
application at the destination port.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
udpOutDatagrams { udp 4 }
Syntax:
Counter
Definition:
The total number of UDP datagrams sent from this entity.
Access:
read-only.
Status:
mandatory.
5.7.1. The UDP Listener table
The UDP listener table contains information about this entity's UDP
end-points on which a local application is currently accepting
datagrams.
OBJECT:
-------
udpTable { udp 5 }
Syntax:
SEQUENCE OF UdpEntry
Definition:
A table containing UDP listener information.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
udpEntry { udpTable 1 }
Syntax:
UdpEntry ::= SEQUENCE {
udpLocalAddress
IpAddress,
udpLocalPort
INTEGER (0..65535)
}
Definition:
Information about a particular current UDP listener.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
udpLocalAddress { udpEntry 1 }
Syntax:
IpAddress
Definition:
The local IP address for this UDP listener. In the case
of a UDP listener which is willing to accept datagrams
for any IP interface associated with the node, the value
0.0.0.0 is used.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
udpLocalPort { udpEntry 2 }
Syntax:
INTEGER (0..65535)
Definition:
The local port number for this UDP listener.
Access:
read-only.
Status:
mandatory.
5.8. The EGP Group
Implementation of the EGP group is mandatory for all systems which
implement the EGP.
OBJECT:
-------
egpInMsgs { egp 1 }
Syntax:
Counter
Definition:
The number of EGP messages received without error.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpInErrors { egp 2 }
Syntax:
Counter
Definition:
The number of EGP messages received that proved to be in
error.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpOutMsgs { egp 3 }
Syntax:
Counter
Definition:
The total number of locally generated EGP messages.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpOutErrors { egp 4 }
Syntax:
Counter
Definition:
The number of locally generated EGP messages not sent due
to resource limitations within an EGP entity.
Access:
read-only.
Status:
mandatory.
5.8.1. The EGP Neighbor table
The Egp Neighbor table contains information about this entity's EGP
neighbors.
OBJECT:
-------
egpNeighTable { egp 5 }
Syntax:
SEQUENCE OF EgpNeighEntry
Definition:
The EGP neighbor table.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighEntry { egpNeighTable 1 }
Syntax:
EgpNeighEntry ::= SEQUENCE {
egpNeighState
INTEGER,
egpNeighAddr
IpAddress,
egpNeighAs
INTEGER,
egpNeighInMsgs
Counter,
egpNeighInErrs
Counter,
egpNeighOutMsgs
Counter,
egpNeighOutErrs
Counter,
egpNeighInErrMsgs
Counter,
egpNeighOutErrMsgs
Counter,
egpNeighStateUps
Counter,
egpNeighStateDowns
Counter,
egpNeighIntervalHello
INTEGER,
egpNeighIntervalPoll
INTEGER,
egpNeighMode
INTEGER,
egpNeighEventTrigger
INTEGER
}
Definition:
Information about this entity's relationship with a
particular EGP neighbor.
Access:
read-only.
Status:
mandatory.
We now consider the individual components of each EGP neighbor
entry:
OBJECT:
-------
egpNeighState { egpNeighEntry 1 }
Syntax:
INTEGER {
idle(1),
acquisition(2),
down(3),
up(4),
cease(5)
}
Definition:
The EGP state of the local system with respect to this
entry's EGP neighbor. Each EGP state is represented by a
value that is one greater than the numerical value
associated with said state in RFC 904.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighAddr { egpNeighEntry 2 }
Syntax:
IpAddress
Definition:
The IP address of this entry's EGP neighbor.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighAs { egpNeighEntry 3 }
Syntax:
INTEGER
Definition:
The autonomous system of this EGP peer. Zero should be
specified if the autonomous system number of the neighbor
is not yet known.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighInMsgs { egpNeighEntry 4 }
Syntax:
Counter
Definition:
The number of EGP messages received without error from
this EGP peer.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighInErrs { egpNeighEntry 5 }
Syntax:
Counter
Definition:
The number of EGP messages received from this EGP peer
that proved to be in error (e.g., bad EGP checksum).
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighOutMsgs { egpNeighEntry 6 }
Syntax:
Counter
Definition:
The number of locally generated EGP messages to this EGP
peer.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighOutErrs { egpNeighEntry 7 }
Syntax:
Counter
Definition:
The number of locally generated EGP messages not sent to
this EGP peer due to resource limitations within an EGP
entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighInErrMsgs { egpNeighEntry 8 }
Syntax:
Counter
Definition:
The number of EGP-defined error messages received from
this EGP peer.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighOutErrMsgs { egpNeighEntry 9 }
Syntax:
Counter
Definition:
The number of EGP-defined error messages sent to this EGP
peer.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighStateUps { egpNeighEntry 10 }
Syntax:
Counter
Definition:
The number of EGP state transitions to the UP state with
this EGP peer.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighStateDowns { egpNeighEntry 11 }
Syntax:
Counter
Definition:
The number of EGP state transitions from the UP state to
any other state with this EGP peer.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighIntervalHello { egpNeighEntry 12 }
Syntax:
INTEGER
Definition:
The interval between EGP Hello command retransmissions
(in hundredths of a second). This represents the t1
timer as defined in RFC 904.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighIntervalPoll { egpNeighEntry 13 }
Syntax:
INTEGER
Definition:
The interval between EGP poll command retransmissions (in
hundredths of a second). This represents the t3 timer as
defined in RFC 904.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighMode { egpNeighEntry 14 }
Syntax:
INTEGER {
active(1),
passive(2)
}
Definition:
The polling mode of this EGP entity, either passive or
active.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighEventTrigger { egpNeighEntry 15 }
Syntax:
INTEGER {
start(1),
stop(2)
}
Definition:
A control variable used to trigger operator-initiated
Start and Stop events. When read, this variable always
returns the most recent value that egpNeightEventTrigger
was set to. If it has not been set since the last
initialization of the network management subsystem on the
node, it returns a value of "stop".
Access:
read-write
Status:
mandatory.
5.8.2. Additional EGP variables
OBJECT:
-------
egpAs { egp 6 }
Syntax:
INTEGER
Definition:
The autonomous system number of this EGP entity.
Access:
read-only.
Status:
mandatory.
5.9. The Transmission Group
Based on the transmission media underlying each interface on a
system, the corresponding portion of the Transmission group is
mandatory for that system.
When Internet-standard definitions for managing transmission media
are defined, the transmission group is used to provide a prefix for
the names of those objects.
Typically, such definitions reside in the experimental portion of the
MIB until they are "proven", then as a part of the Internet
standardization process, the definitions are accordingly elevated and
a new object identifier, under the transmission group is defined. By
convention, the name assigned is:
type OBJECT IDENTIFIER ::= { transmission number }
where "type" is the symbolic value used for the media in the ifType
column of the ifTable object, and "number" is the actual integer
value corresponding to the symbol.
5.10. The SNMP Group
Implementation of the SNMP group is mandatory for all systems which
support an SNMP protocol entity. Some of the objects defined below
will be zero-valued in those SNMP implementations that are optimized
to support only those functions specific to either a management agent
or a management client.
OBJECT:
-------
snmpInPkts { snmp 1 }
Syntax:
Counter
Definition:
The total number of PDUs delivered to the SNMP entity
from the transport service.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutPkts { snmp 2 }
Syntax:
Counter
Definition:
The total number of SNMP PDUs which were passed from the
SNMP protocol entity to the transport service.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInBadVersions { snmp 3 }
Syntax:
Counter
Definition:
The total number of syntactically correct SNMP PDUs which
were delivered to the SNMP protocol entity and were for
an unsupported SNMP version.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInBadCommunityNames { snmp 4 }
Syntax:
Counter
Definition:
The total number of SNMP PDUs delivered to the SNMP
protocol entity which used a SNMP community name not
known to said entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInBadCommunityUses { snmp 5 }
Syntax:
Counter
Definition:
The total number of SNMP PDUs delivered to the SNMP
protocol entity which represented an SNMP operation which
was not allowed by the SNMP community named in the PDU.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInASNParseErrs { snmp 6 }
Syntax:
Counter
Definition:
The total number of ASN.1 parsing errors (either in
encoding or syntax) encountered by the SNMP protocol
entity when decoding received SNMP PDUs.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInBadTypes { snmp 7 }
Syntax:
Counter
Definition:
The total number of SNMP PDUs delivered to the SNMP
protocol entity which had an unknown PDU type.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInTooBigs { snmp 8 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were delivered to
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "tooBig."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInNoSuchNames { snmp 9 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were delivered to
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "noSuchName."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInBadValues { snmp 10 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were delivered to
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "badValue."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInReadOnlys { snmp 11 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were delivered to
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "readOnly."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInGenErrs { snmp 12 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were delivered to
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "genErr."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInTotalReqVars { snmp 13 }
Syntax:
Counter
Definition:
The total number of MIB objects which have been retrieved
successfully by the SNMP protocol entity as the result of
receiving valid SNMP Get-Request and Get-Next PDUs.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInTotalSetVars { snmp 14 }
Syntax:
Counter
Definition:
The total number of MIB objects which have been altered
successfully by the SNMP protocol entity as the result of
receiving valid SNMP Set-Request PDUs.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInGetRequests { snmp 15 }
Syntax:
Counter
Definition:
The total number of SNMP Get-Request PDUs which have been
accepted and processed by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInGetNexts { snmp 16 }
Syntax:
Counter
Definition:
The total number of SNMP Get-Next PDUs which have been
accepted and processed by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInSetRequests { snmp 17 }
Syntax:
Counter
Definition:
The total number of SNMP Set-Request PDUs which have been
accepted and processed by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInGetResponses { snmp 18 }
Syntax:
Counter
Definition:
The total number of SNMP Get-Response PDUs which have
been accepted and processed by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInTraps { snmp 19 }
Syntax:
Counter
Definition:
The total number of SNMP Trap PDUs which have been
accepted and processed by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutTooBigs { snmp 20 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were generated by
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "tooBig."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutNoSuchNames { snmp 21 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were generated by
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "noSuchName."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutBadValues { snmp 22 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were generated by
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "badValue."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutReadOnlys { snmp 23 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were generated by
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "readOnly."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutGenErrs { snmp 24 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were generated by
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "genErr."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutGetRequests { snmp 25 }
Syntax:
Counter
Definition:
The total number of SNMP Get-Request PDUs which have been
generated by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutGetNexts { snmp 26 }
Syntax:
Counter
Definition:
The total number of SNMP Get-Next PDUs which have been
generated by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutSetRequests { snmp 27 }
Syntax:
Counter
Definition:
The total number of SNMP Set-Request PDUs which have been
generated by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutGetResponses { snmp 28 }
Syntax:
Counter
Definition:
The total number of SNMP Get-Response PDUs which have
been generated by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutTraps { snmp 29 }
Syntax:
Counter
Definition:
The total number of SNMP Trap PDUs which have been
generated by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpEnableAuthTraps { snmp 30 }
Syntax:
INTEGER {
enabled(1),
disabled(2)
}
Definition:
Indicates whether the SNMP agent process is configured to
generate authentication-failure traps.
Access:
read-write.
Status:
mandatory.
(page 95 continued on part 4)
