07-Layer 3 - IP Services

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19-TCP-MIB
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19-TCP-MIB 81.04 KB

TCP-MIB

About this MIB

This MIB is defined by RFC 4022. Use this MIB to obtain the TCP protocol parameters, TCP connection information, and TCP packet statistics.

MIB file name

rfc4022-tcp.mib

Root object

iso(1).org(3).dod(6).internet(1).mgmt(2).mib-2(1).tcp(6)

Scalar objects

tcpRtoAlgorithm

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpRtoAlgorithm (1.3.6.1.2.1.6.1)

read-only

INTEGER

other(1),

constant(2),

rsre(3),

vanj(4)

Algorithm used to determine the timeout value for retransmitting unacknowledged octets.

As per the MIB.

tcpRtoMin

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpRtoMin (1.3.6.1.2.1.6.2)

read-only

Integer32

Integer32 (0..2147483647)

Minimum value, in milliseconds, for the TCP retransmission timeout.

As per the MIB.

tcpRtoMax

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpRtoMax (1.3.6.1.2.1.6.3)

read-only

Integer32

Integer32 (0..2147483647)

Maximum value, in milliseconds, for the TCP retransmission timeout.

As per the MIB.

tcpMaxConn

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpMaxConn (1.3.6.1.2.1.6.4)

read-only

Integer32

Integer32 (-1 | 0..2147483647)

Maximum number of TCP connections that are supported.

In the maximum number is a dynamic value, this object take the "value–1".

As per the MIB.

tcpActiveOpens

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpActiveOpens (1.3.6.1.2.1.6.5)

read-only

Counter32

Standard MIB values.

Number of times that TCP connections have made a direct transition to the SYN-SENT state from the CLOSED state.

As per the MIB.

tcpPassiveOpens

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpPassiveOpens (1.3.6.1.2.1.6.6)

read-only

Counter32

Standard MIB values.

Number of times that TCP connections have made a direct transition to the SYN-RCVD state from the LISTEN state.

As per the MIB.

tcpAttemptFails

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpAttemptFails (1.3.6.1.2.1.6.7)

read-only

Counter32

Standard MIB values.

Sum of the following number of times that TCP connections have made a direct transition:

·     Number of transitions to the CLOSED state from either the SYN-SENT state or the SYN-RCVD state.

·     Number of transitions to the LISTEN state from the SYN-RCVD state.

As per the MIB.

tcpEstabResets

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpEstabResets (1.3.6.1.2.1.6.8)

read-only

Counter32

Standard MIB values.

Number of times that TCP connections have made a direct transition to the CLOSED state from either the ESTABLISHED state or the CLOSE-WAIT state.

As per the MIB.

tcpCurrEstab

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpCurrEstab (1.3.6.1.2.1.6.9)

read-only

Gauge32

Standard MIB values.

Number of TCP connections for which the current state is either ESTABLISHED or CLOSE-WAIT.

As per the MIB.

tcpInSegs

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpInSegs (1.3.6.1.2.1.6.10)

read-only

Counter32

Standard MIB values.

Total number of segments received, including those received in error, and the segments received on established connections.

As per the MIB.

tcpOutSegs

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpOutSegs (1.3.6.1.2.1.6.11)

read-only

Counter32

Standard MIB values.

Total number of sent segments, including those on current connections. The segments containing only retransmitted octets are not included.

As per the MIB.

tcpRetransSegs

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpRetransSegs (1.3.6.1.2.1.6.12)

read-only

Counter32

Standard MIB values.

Total number of segments retransmitted, that is, the number of transmitted TCP segments containing one or more previously transmitted octets.

As per the MIB.

tcpInErrs

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpInErrs (1.3.6.1.2.1.6.14)

read-only

Counter32

Standard MIB values.

Total number of segments received in error (for example, bad TCP checksums).

As per the MIB.

tcpOutRsts

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpOutRsts (1.3.6.1.2.1.6.15)

read-only

Counter32

Standard MIB values.

Number of sent TCP segments containing the RST flag.

As per the MIB.

tcpHCInSegs

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpHCInSegs (1.3.6.1.2.1.6.17)

read-only

Counter64

Standard MIB values.

64-bit equivalent of tcpInSegs.

Not supported

tcpHCOutSegs

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpHCOutSegs (1.3.6.1.2.1.6.18)

read-only

Counter64

Standard MIB values.

64-bit equivalent of tcpOutSegs.

Not supported

Tabular objects

tcpConnTable

About this table

Use this table to obtain detailed IPv4 TCP connection information.

Support for operations

Create

Edit/Modify

Delete

Read

Not supported

Not supported

Not supported

Supported

Columns

The table indexes are tcpConnLocalAddress, tcpConnLocalPort, tcpConnRemAddress, and tcpConnRemPort.

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpConnState (1.3.6.1.2.1.6.13.1.1)

read-write

INTEGER

closed(1),

listen(2),

synSent(3),

synReceived(4),

established(5),

finWait1(6),

finWait2(7),

closeWait(8),

lastAck(9),

closing(10),

timeWait(11),

deleteTCB(12)

TCP connection state.

The only value that a management station can set is deleteTCB(12).

If a management station tries to set the object to a value other than deleteTCB(12), the agent will return an error response.

If the object value is set to deleteTCB(12), TCB will deleted and the corresponding TCP connection will be terminated.

Read only.

tcpConnLocalAddress (1.3.6.1.2.1.6.13.1.2)

read-only

IpAddress

Standard MIB values.

Local IP address for the TCP connection. The value 0.0.0.0 indicates that the connection in the listen state can accept connections for any interface.

As per the MIB.

tcpConnLocalPort (1.3.6.1.2.1.6.13.1.3)

read-only

Integer32

Integer32 (0..65535)

Local port number of the TCP connection.

As per the MIB.

tcpConnRemAddress (1.3.6.1.2.1.6.13.1.4)

read-only

IpAddress

Standard MIB values.

Remote IP address of the TCP connection.

As per the MIB.

tcpConnRemPort (1.3.6.1.2.1.6.13.1.5)

read-only

Integer32

Integer32 (0..65535)

Remote port number of the TCP connection.

As per the MIB.

tcpConnectionTable

About this table

Use this table to obtain TCP connection information. Different from tcpConnTable, information about the connections in the LISTEN state is stored in tcpListenTable.

Support for operations

Create

Edit/Modify

Delete

Read

Not supported

Not supported

Not supported

Supported

Columns

The table indexes are tcpConnectionLocalAddressType, tcpConnectionLocalAddress, tcpConnectionLocalPort, tcpConnectionRemAddressType, tcpConnectionRemAddress, and tcpConnectionRemPort.

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpConnectionLocalAddressType (1.3.6.1.2.1.6.19.1.1)

not-accessible

InetAddressType

Standard MIB values.

Address type of tcpConnectionLocalAddress.

Only supports ipv4(1) and ipv6 (2).

tcpConnectionLocalAddress (1.3.6.1.2.1.6.19.1.2)

not-accessible

InetAddress

Standard MIB values.

Local IP address of the TCP connection.

As per the MIB.

tcpConnectionLocalPort (1.3.6.1.2.1.6.19.1.3)

not-accessible

InetPortNumber

Standard MIB values.

Local port number of the TCP connection.

As per the MIB.

tcpConnectionRemAddressType (1.3.6.1.2.1.6.19.1.4)

not-accessible

InetAddressType

Standard MIB values.

Address type of tcpConnectionRemAddress.

Supports only ipv4(1) and ipv6 (2).

tcpConnectionRemAddress (1.3.6.1.2.1.6.19.1.5)

not-accessible

InetAddress

Standard MIB values.

Remote IP address of the TCP connection.

As per the MIB.

tcpConnectionRemPort (1.3.6.1.2.1.6.19.1.6)

not-accessible

InetPortNumber

Standard MIB values.

Remote port number of the TCP connection.

As per the MIB.

tcpConnectionState (1.3.6.1.2.1.6.19.1.7)

read-write

INTEGER

closed(1),

listen(2),

synSent(3),

synReceived(4),

established(5),

finWait1(6),

finWait2(7),

closeWait(8),

lastAck(9),

closing(10),

timeWait(11),

deleteTCB(12)

TCP connection state.

The only value that a management station can set is deleteTCB(12).

If a management station tries to set the object to a value other than deleteTCB(12), the agent will return an error response.

If the object value is set to deleteTCB(12), TCB will deleted and the corresponding TCP connection will be terminated.

Read only.

tcpConnectionProcess (1.3.6.1.2.1.6.19.1.8)

read-only

Unsigned32

Standard MIB values.

System's process ID for the process associated with this connection. The value is 0 if no such process exists.

As per the MIB.

tcpListenerTable

About this table

Use this table to obtain the TCP listener information.

Support for operations

Create

Edit/Modify

Delete

Read

Not supported

Not supported

Not supported

Supported

Columns

The table indexes are tcpListenerLocalAddressType, tcpListenerLocalAddress, and tcpListenerLocalPort.

Object (OID)

Access

Syntax

Value range

Description

Implementation

tcpListenerLocalAddressType (1.3.6.1.2.1.6.20.1.1)

not-accessible

InetAddressType

Standard MIB values.

Address type of tcpListenerLocalAddress.

The value unknown(0) indicates that the listener accepts connection initiations to all local IP addresses.

Only supports ipv4(1) and ipv6 (2).

tcpListenerLocalAddress (1.3.6.1.2.1.6.20.1.2)

not-accessible

InetAddress

Standard MIB values.

Local IP address of the TCP connection.

As per the MIB.

tcpListenerLocalPort (1.3.6.1.2.1.6.20.1.3)

not-accessible

InetPortNumber

Standard MIB values.

Local port number of the TCP connection.

As per the MIB.

tcpListenerProcess (1.3.6.1.2.1.6.20.1.4)

read-only

Unsigned32

Standard MIB values.

System's process ID for the process associated with this connection. The value is 0 if no such process exists.

As per the MIB.

 

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