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S12700 V200R011C10 MIB Reference

This document provides the function overview, relationships between tables, description of single objects, description of MIB tables, and description of alarm objects.
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tcpListenerTable

tcpListenerTable

This table contains the information about all TCP listeners including IPv4 TCP listeners and IPv6 TCP listeners.

This table contains the following objects:

  • tcpListenerLocalAddressType

  • tcpListenerLocalAddress

  • tcpListenerLocalPort

  • tcpListenerProcess

The indexes of this table are tcpListenerLocalAddressType, tcpListenerLocalAddress and tcpListenerLocalPort.

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.6.20.1.1

tcpListenerLocalAddressType

InetAddressType

Not-accessible

This object indicates the address type of tcpListenerLocalAddress. The value should be unknown (0) if connection initiations to all local IP addresses are accepted.

The value of this object is an enumerated value, and can be IPv4(1), IPv4z(2), IPv6(3), and IPv6z(4).

Currently, the TCP module of the switches support only IPv4(1) and IPv6(3).

1.3.6.1.2.1.6.20.1.2

tcpListenerLocalAddress

InetAddress

Not-accessible

This object indicates the local IP address for this TCP connection.

The value of this object can be represented in three possible ways, depending on the characteristics of the application:

1. For an application willing to accept both IPv4 and IPv6 datagrams, the value of this object must be ''h (a zero-length octet-string), with the value of the corresponding tcpListenerLocalAddressType object being unknown (0).

2. For an application willing to accept only IPv4 or IPv6 datagrams, the value of this object must be '0.0.0.0' or '::' respectively, with tcpListenerLocalAddressType representing the appropriate address type.

3. For an application which is listening for data destined only to a specific IP address, the value of this object is the specific local address, with tcpListenerLocalAddressType representing the appropriate address type.

As this object is used in the index for the tcpListenerTable, implementors should be careful not to create entries that would result in OIDs with more than 128 subidentifiers; otherwise the information cannot be accessed, using SNMPv1, SNMPv2c, or SNMPv3.

This object is implemented as defined in the corresponding MIB file.

1.3.6.1.2.1.6.20.1.3

tcpListenerLocalPort

InetPortNumber

Not-accessible

The local port number for this TCP connection.

This object is implemented as defined in the corresponding MIB file.

1.3.6.1.2.1.6.20.1.4

tcpListenerProcess

Unsigned32

Read-only

This object indicates the system's process ID for the process associated with this listener, or zero if there is no such process. This value is expected to be the same as HOST-RESOURCES-MIB:: hrSWRunIndex or SYSAPPL-MIB::sysApplElmtRunIndex for some row in the appropriate tables.

This object is implemented as defined in the corresponding MIB file.

Creation Restriction

This table cannot be created.

Modification Restriction

This table cannot be modified.

Deletion Restriction

This table cannot be deleted.

Access Restriction

The entries in this table can be read only when the system has established TCP connections.

The values of tcpListenerLocalAddressType and tcpListenerLocalAddress vary in the following situations:

  • If an endpoint of an application can receive only IPv4 packets or IPv6 packets, the value of tcpListenerLocalAddressType is 1 (IPv4) or 3 (IPv6), and the value of tcpListenerLocalAddress is 0.0.0.0 (IPv4) or :: (IPv6).

  • If the endpoint of an application can receive data packets from a certain interface of the local system only, the value of tcpListenerLocalAddressType is 1 (IPv4) or 3 (IPv6), and the value of tcpListenerLocalAddress is the IP address of an interface.

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Updated: 2019-03-29

Document ID: EDOC1000178122

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