Axibase Collector

SNMP Job

The SNMP job collects metrics from IP-addressable devices over the SNMP (Simple Network Management Protocol) protocol. The job monitors system availability and performance without installing a custom agent on the target system. The statistics are exposed by a SNMP daemon available by default on network devices and as a package for Linux, Windows, and HP-UX operating systems.

Prerequisites

  • Install snmp package on the Collector server.
apt-get install snmp

yum -y install net-snmp net-snmp-utils
  • Verify that snmptranslate -h utility is installed.
USAGE: snmptranslate [OPTIONS] OID [OID]...
Version:  5.7.2
...

Quick Start

  • Import MIB files into Collector as described in the Base MIB files section.
  • Import snmp-os SNMP Job into Collector.
  • Open the Collections > Item Lists page in Collector, specify monitored hosts in the SNMP Devices list.
  • Open the snmp-os job in Collector, open the system statistics configuration and click Test to check connectivity. Run the job manually to collect initial metric values.
  • Log in to ATSD and verify that SNMP metrics are displayed on the Metrics tab with the snmp* prefix.
  • Import group-snmp SNMP entity group into ATSD.
  • Import portal-snmp SNMP Portal into ATSD. See an example portal below.

Job Settings

The SNMP job allows creating multiple configurations to query objects in different MIB files. The configurations are executed sequentially, while SNMP GETBULK operations to remote devices in each configuration are executed in parallel.

Each configuration retrieves pre-defined object values, identified by OID (Object Identifier), from hostnames or IP addresses in the Device List. Metrics collected from the same device are sent into ATSD under an entity name based on the device hostname or IP address as specified in the Device List.

Configuration Settings

The settings specify the list of devices to query as well as connection properties.

Query Settings

Field Description
Device List List of hostnames or IP addresses to query.
Metric Prefix Prefix added to metric names sent into ATSD.
MIB Name MIB file containing object definitions.
Metric OIDs Object names containing numeric metric values.
Series Tag OIDs Object names containing series tags.

To populate the list of collected metric objects, click Configure button to view the editor.

Enter a hostname or IP address for one of the target systems and click Load All Values. Choose which objects to collect. If the object has an additional dimension such as interface or disk name, classify such OID as tag.

Connection Settings

Field Description
Transport TCP or UDP protocol used for connecting to the devices.
Port TCP or UDP port.
Version SNMP protocol version.
Community SNMP community name, such as public.
Timeout, seconds Number of seconds after which Collector interrupts the query. 0 or -1 is unlimited.
Retries Number of connection retries in case of network failure.
Maximum Repetitions Maximum number of iterations over the repeating variables.
Non Repeaters Number of supplied variables that must not be iterated over.

Supported SNMP protocol versions:

  • SNMP v2c
  • SNMP v3

Security Settings

The following settings apply to SNMP protocol v3.

Field Description
Authentication Protocol Encryption protocol for authentication.
Allowed values: MD5, SHA.
Security Name Username.
Authentication Pass Phrase Password.
Privacy Pass Phrase Pass phrase for data transmission.
Privacy Protocol Data encryption protocol.
Allowed values: DES, TRIPLE_DES, AES128, AES192, AES256.
Security Level Allowed values:
NO_AUTH_NO_PRIV: no authentication, no encryption.
AUTH_NO_PRIV: authentication, no encryption.
AUTH_PRIV: authentication and encryption.

Testing Connections

Network connectivity between Collector and a remote system is required.

To check that the SNMP daemon on the target device is reachable, open the SNMP configuration page.

Select a MIB file in the drop-down list.

Fill out connection properties and click Configure. The configuration settings are saved automatically, when the configuration editor is launched.

Enter the target hostname or IP address and click Load All Values.

Configuration Example

SNMP configuration example:

SNMP Configuration

Click Test to view sample series commands for the given configuration.

series e:192.0.2.1 d:2018-06-27T11:14:56.481Z m:snmp.laLoad=1.56 t:laNames=Load-1
series e:192.0.2.1 d:2018-06-27T11:14:56.481Z m:snmp.laLoad=2.14 t:laNames=Load-15
series e:192.0.2.1 d:2018-06-27T11:14:56.481Z m:snmp.laLoad=1.97 t:laNames=Load-5
series e:192.0.2.1 d:2018-06-27T11:14:56.481Z m:snmp.memShared=494356
series e:192.0.2.1 d:2018-06-27T11:14:56.481Z m:snmp.memBuffer=403904
series e:192.0.2.1 d:2018-06-27T11:14:56.481Z m:snmp.memTotalReal=65124968
series e:192.0.2.1 d:2018-06-27T11:14:56.481Z m:snmp.memAvailReal=16156972
series e:192.0.2.1 d:2018-06-27T11:14:56.481Z m:snmp.memCached=25270224
series e:192.0.2.1 d:2018-06-27T11:14:56.481Z m:snmp.memTotalFree=49637572
series e:192.0.2.1 d:2018-06-27T11:14:56.481Z m:snmp.memAvailSwap=33480600
series e:192.0.2.1 d:2018-06-27T11:14:56.481Z m:snmp.memTotalSwap=33537916

MIB Files

The SNMP daemon running on the remote system publishes available configuration and performance objects using OIDs (object identifiers). The OIDs are defined in Management Information Base (MIB) files and contain information such as object name, type, data type etc.

laLoad .1.3.6.1.4.1.2021.10.1.3

enterprises.ucdavis.laTable.laEntry.laLoad
laLoad OBJECT-TYPE
  -- FROM UCD-SNMP-MIB
  -- TEXTUAL CONVENTION DisplayString
  SYNTAX  OCTET STRING (0..255)
  DISPLAY-HINT  "255a"
  MAX-ACCESS  read-only
  STATUS  current
  DESCRIPTION "The 1,5 and 15 minute load averages (one per row)."
::= { iso(1) org(3) dod(6) internet(1) private(4) enterprises(1) ucdavis(2021) laTable(10) laEntry(1) 3 }

Collector needs access to MIB files to translate OIDs received from the remote systems into object names used in ATSD the metric and series tag names.

1.3.6.1.4.1.2021.10.1.3 --> laLoad

series e:192.0.2.1 d:2018-06-27T10:09:19.649Z t:laNames=Load-1 m:snmp.laLoad=2.79

The SNMP job supports built-in and custom MIB files.

SNMP MIB Import

Load MIB files into the Collector instance on the Admin > SNMP MIBs page.

Perform this task initially, as part of post-installation configuration, as well as when you enable monitoring for a new class of remote systems with custom MIB files.

Open Admin > SNMP MIBs > Upload MIB page.

Attach a MIB file and click Upload.

The MIB file is validated and translated using the snmptranslate utility installed on the underlying Linux operating system. A translated list of OIDs is loaded into the Collector database.

MIB Tree

MIB format is hierarchical and allows for inheriting definitions from parent MIBs. As a result, you must import parent MIBs first.

IF-MIB DEFINITIONS ::= BEGIN

IMPORTS
    MODULE-IDENTITY, OBJECT-TYPE, Counter32, Gauge32, Counter64,
    Integer32, TimeTicks, mib-2,
    NOTIFICATION-TYPE                        FROM SNMPv2-SMI
    TEXTUAL-CONVENTION, DisplayString,
    PhysAddress, TruthValue, RowStatus,
    TimeStamp, AutonomousType, TestAndIncr   FROM SNMPv2-TC
    MODULE-COMPLIANCE, OBJECT-GROUP,
    NOTIFICATION-GROUP                       FROM SNMPv2-CONF
    snmpTraps                                FROM SNMPv2-MIB
    IANAifType                               FROM IANAifType-MIB;

When you import the MIB file Collector searches for any parent files, specified in the IMPORTS section, among the previously loaded MIB files as well as MIB files stored on the underlying operating system.

System MIB directory location:

  • On Linux, the MIB files are stored in the /usr/share/snmp directory.
  • On HP-UX, the MIB files are stored in the /var/opt/OV/share/snmp_mibs directory.

Base MIB Files

The following table contains links to MIB files for monitoring operating system performance metrics. Upload the MIB files into your Collector instance in the order specified in the Priority column.

Priority MIB Description Dependencies
1 SNMPv2-SMI - -
2 SNMPv2-TC Represents textual information taken from the NVT ASCII character set SNMPv2-SMI
3 SNMPv2-MIB The MIB module for SNMP entities SNMPv2-TC
4 UCD-SNMP-MIB System load average, CPU utilization, memory configuration and usage, disk used. SNMPv2-MIB
5 IF-MIB Network interface counters SNMPv2-MIB

SNMP Portal

Troubleshooting

Connectivity

Test that the target server is accessible using snmpwalk utility.

snmpwalk -v2c -c public udp:192.0.2.1:161

iso.3.6.1.2.1.1.1.0 = STRING: "Linux NURSWGVML007 4.4.0-127-generic #153-Ubuntu SMP Sat May 19 10:58:46 UTC 2018 x86_64"
iso.3.6.1.2.1.1.2.0 = OID: iso.3.6.1.4.1.8072.3.2.10
iso.3.6.1.2.1.1.3.0 = Timeticks: (15651) 0:02:36.51
iso.3.6.1.2.1.1.4.0 = STRING: "john.doe@example.org>"
iso.3.6.1.2.1.1.5.0 = STRING: "192.0.2.1"
...

System View Restriction

On some systems, access to OIDs other than those containing basic information is disabled in by the SNMP daemon.

In case of Bad value(endOfMibView) error, modify the SNMP daemon configuration on the target server.

The error is displayed as end of the MIB tree at the end of the the snmpwalk output.

...
iso.3.6.1.2.1.25.1.7.0 = No more variables left in this MIB View (It is past the end of the MIB tree)

Open the /etc/snmp/snmpd.conf file.

Ubuntu/Debian

Remove -V systemonly restriction from the rocommunity setting.

# rocommunity public default -V systemonly
rocommunity public default

Restart the SNMP daemon.

service snmpd restart

RHEL/Centos

#       group          context sec.model sec.level prefix read   write  notif
access  notConfigGroup ""      any       noauth    exact  systemview none none

Create a new view named all containing all OIDs.

#       name           incl/excl     subtree         mask(optional)
view    systemview    included   .1.3.6.1.2.1.1
view    systemview    included   .1.3.6.1.2.1.25.1.1
view    all           included   .1

Grant the public community read-only permissions to the all view.

#       group          context sec.model sec.level prefix read   write  notif
access  notConfigGroup ""      any       noauth    exact  all none none

Restart the SNMP daemon to apply the changes.

Unknown Objects

To check that the remote system publishes operating system OIDs in the UCD-SNMP-MIB MIB, execute the snmpwalk command with the OID filter set to 1.3.6.1.4.1.2021 (iso(1) org(3) dod(6) internet(1) private(4) enterprises(1) ucdavis(2021)).

snmpwalk -v2c -c public udp:192.0.2.1:161 1.3.6.1.4.1.2021

The expected output contains a list of nested OIDs.

iso.3.6.1.4.1.2021.2.1.1.1 = INTEGER: 1
iso.3.6.1.4.1.2021.2.1.1.2 = INTEGER: 2
iso.3.6.1.4.1.2021.2.1.1.3 = INTEGER: 3
iso.3.6.1.4.1.2021.2.1.2.1 = STRING: "mountd"
iso.3.6.1.4.1.2021.2.1.2.2 = STRING: "ntalkd"
iso.3.6.1.4.1.2021.2.1.2.3 = STRING: "sendmail"
iso.3.6.1.4.1.2021.2.1.3.1 = INTEGER: 1
iso.3.6.1.4.1.2021.2.1.3.2 = INTEGER: 0
iso.3.6.1.4.1.2021.2.1.3.3 = INTEGER: 1
iso.3.6.1.4.1.2021.2.1.4.1 = INTEGER: 0
iso.3.6.1.4.1.2021.2.1.4.2 = INTEGER: 4
iso.3.6.1.4.1.2021.2.1.4.3 = INTEGER: 10
iso.3.6.1.4.1.2021.2.1.5.1 = INTEGER: 0
iso.3.6.1.4.1.2021.2.1.5.2 = INTEGER: 0
...

SNMP Object Reference

UCD-SNMP-MIB

  • Table prTable: 1.3.6.1.4.1.2021.2

    Object Description
    prEntry
    1.3.6.1.4.1.2021.2.1    		 An entry containing a process and its statistics.
    prIndex
    1.3.6.1.4.1.2021.2.1.1    		 Reference Index for each observed process.
    prNames
    1.3.6.1.4.1.2021.2.1.2    		 The process name we're counting/checking on.
    prMin
    1.3.6.1.4.1.2021.2.1.3    		 The minimum number of processes that must be running. An error setting is generated if the number of running processes is < the minimum.
    prMax
    1.3.6.1.4.1.2021.2.1.4    		 The maximum number of processes that must be running. An error setting is generated if the number of running processes is > the maximum.
    prCount
    1.3.6.1.4.1.2021.2.1.5    		 The number of current processes running with the name in question.
    prErrorFlag
    1.3.6.1.4.1.2021.2.1.100    		 A Error setting to indicate trouble with a process. Setting goes to 1 if there is an error, 0 if no error.
    prErrMessage
    1.3.6.1.4.1.2021.2.1.101    		 An error message describing the problem (if one exists).
    prErrFix
    1.3.6.1.4.1.2021.2.1.102    		 Setting this to one tries to fix the problem if the agent has been configured with a script to call to attempt to fix problems automatically using remote snmp operations.
    prErrFixCmd
    1.3.6.1.4.1.2021.2.1.103    		 The command that gets run when the prErrFix column is set to 1.

  • Table memory: 1.3.6.1.4.1.2021.4

    Object Description
    memIndex
    1.3.6.1.4.1.2021.4.1    		 Bogus Index. This must always return the integer 0.
    memErrorName
    1.3.6.1.4.1.2021.4.2    		 Bogus Name. This must always return the string swap.
    memTotalSwap
    1.3.6.1.4.1.2021.4.3    		 The total amount of swap space configured for this host.
    memAvailSwap
    1.3.6.1.4.1.2021.4.4    		 The amount of swap space currently unused or available.
    memTotalReal
    1.3.6.1.4.1.2021.4.5    		 The total amount of real/physical memory installed on this host.
    memAvailReal
    1.3.6.1.4.1.2021.4.6    		 The amount of real/physical memory currently unused or available.
    memTotalSwapTXT
    1.3.6.1.4.1.2021.4.7    		 The total amount of swap space or virtual memory allocated for text pages on this host. This object is not implemented on hosts where the underlying operating system does not distinguish text pages from other uses of swap space or virtual memory.
    memAvailSwapTXT
    1.3.6.1.4.1.2021.4.8    		 The amount of swap space or virtual memory currently being used by text pages on this host. This object is not implemented on hosts where the underlying operating system does not distinguish text pages from other uses of swap space or virtual memory. Note that (despite the name), this value reports the amount used, rather than the amount free or available for use. For clarity, this object is being deprecated in favour of memUsedSwapTXT(16).
    memTotalRealTXT
    1.3.6.1.4.1.2021.4.9    		 The total amount of real/physical memory allocated for text pages on this host. This object is not implemented on hosts where the underlying operating system does not distinguish text pages from other uses of physical memory.
    memAvailRealTXT
    1.3.6.1.4.1.2021.4.10    		 The amount of real/physical memory currently being used by text pages on this host. This object is not implemented on hosts where the underlying operating system does not distinguish text pages from other uses of physical memory. Note that (despite the name), this value reports the amount used, rather than the amount free or available for use. For clarity, this object is being deprecated in favour of memUsedRealTXT(17).
    memTotalFree
    1.3.6.1.4.1.2021.4.11    		 The total amount of memory free or available for use on this host. This value typically covers both real memory and swap space or virtual memory.
    memMinimumSwap
    1.3.6.1.4.1.2021.4.12    		 The minimum amount of swap space expected to be kept free or available during normal operation of this host. If this value (as reported by memAvailSwap(4)) falls below the specified level, then memSwapError(100) is set to 1 and an error message made available via memSwapErrorMsg(101).
    memShared
    1.3.6.1.4.1.2021.4.13    		 The total amount of real or virtual memory currently allocated for use as shared memory. This object is not implemented on hosts where the underlying operating system does not explicitly identify memory as specifically reserved for this purpose.
    memBuffer
    1.3.6.1.4.1.2021.4.14    		 The total amount of real or virtual memory currently allocated for use as memory buffers. This object is not implemented on hosts where the underlying operating system does not explicitly identify memory as specifically reserved for this purpose.
    memCached
    1.3.6.1.4.1.2021.4.15    		 The total amount of real or virtual memory currently allocated for use as cached memory. This object is not implemented on hosts where the underlying operating system does not explicitly identify memory as specifically reserved for this purpose.
    memUsedSwapTXT
    1.3.6.1.4.1.2021.4.16    		 The amount of swap space or virtual memory currently being used by text pages on this host. This object is not implemented on hosts where the underlying operating system does not distinguish text pages from other uses of swap space or virtual memory.
    memUsedRealTXT
    1.3.6.1.4.1.2021.4.17    		 The amount of real/physical memory currently being used by text pages on this host. This object is not implemented on hosts where the underlying operating system does not distinguish text pages from other uses of physical memory.
    memSwapError
    1.3.6.1.4.1.2021.4.100    		 Indicates whether the amount of available swap space (as reported by memAvailSwap(4)), is less than the specified minimum (defined by memMinimumSwap(12)).
    memSwapErrorMsg
    1.3.6.1.4.1.2021.4.101    		 Describes whether the amount of available swap space (as reported by memAvailSwap(4)), is less than the specified minimum (defined by memMinimumSwap(12)).

  • Table extTable: 1.3.6.1.4.1.2021.8

    Object Description
    extEntry
    1.3.6.1.4.1.2021.8.1    		 An entry containing an extensible script/program and its output.
    extIndex
    1.3.6.1.4.1.2021.8.1.1    		 Reference Index for extensible scripts. Simply an integer row number.
    extNames
    1.3.6.1.4.1.2021.8.1.2    		 A Short, one name description of the extensible command.
    extCommand
    1.3.6.1.4.1.2021.8.1.3    		 The command line to be executed.
    extResult
    1.3.6.1.4.1.2021.8.1.100    		 The result code (exit status) from the executed command.
    extOutput
    1.3.6.1.4.1.2021.8.1.101    		 The first line of output of the executed command.
    extErrFix
    1.3.6.1.4.1.2021.8.1.102    		 Setting this to one tries to fix the problem if the agent has been configured with a script to call to attempt to fix problems automatically using remote snmp operations.
    extErrFixCmd
    1.3.6.1.4.1.2021.8.1.103    		 The command that gets run when the extErrFix column is set to 1.

  • Table dskTable: 1.3.6.1.4.1.2021.9

    Object Description
    dskEntry
    1.3.6.1.4.1.2021.9.1    		 An entry containing a disk and its statistics.
    dskIndex
    1.3.6.1.4.1.2021.9.1.1    		 Integer reference number (row number) for the disk mib.
    dskPath
    1.3.6.1.4.1.2021.9.1.2    		 Path where the disk is mounted.
    dskDevice
    1.3.6.1.4.1.2021.9.1.3    		 Path of the device for the partition
    dskMinimum
    1.3.6.1.4.1.2021.9.1.4    		 Minimum space required on the disk (in kBytes) before the errors are triggered. Either this or dskMinPercent is configured via the agent's snmpd.conf file.
    dskMinPercent
    1.3.6.1.4.1.2021.9.1.5    		 Percentage of minimum space required on the disk before the errors are triggered. Either this or dskMinimum is configured via the agent's snmpd.conf file.
    dskTotal
    1.3.6.1.4.1.2021.9.1.6    		 Total size of the disk/partition (kBytes)
    dskAvail
    1.3.6.1.4.1.2021.9.1.7    		 Available space on the disk
    dskUsed
    1.3.6.1.4.1.2021.9.1.8    		 Used space on the disk
    dskPercent
    1.3.6.1.4.1.2021.9.1.9    		 Percentage of space used on disk
    dskPercentNode
    1.3.6.1.4.1.2021.9.1.10    		 Percentage of inodes used on disk
    dskTotalLow
    1.3.6.1.4.1.2021.9.1.11    		 Total size of the disk/partition (kBytes). Together with dskTotalHigh composes 64-bit number.
    dskTotalHigh
    1.3.6.1.4.1.2021.9.1.12    		 Total size of the disk/partition (kBytes). Together with dskTotalLow composes 64-bit number.
    dskAvailLow
    1.3.6.1.4.1.2021.9.1.13    		 Available space on the disk (kBytes). Together with dskAvailHigh composes 64-bit number.
    dskAvailHigh
    1.3.6.1.4.1.2021.9.1.14    		 Available space on the disk (kBytes). Together with dskAvailLow composes 64-bit number.
    dskUsedLow
    1.3.6.1.4.1.2021.9.1.15    		 Used space on the disk (kBytes). Together with dskUsedHigh composes 64-bit number.
    dskUsedHigh
    1.3.6.1.4.1.2021.9.1.16    		 Used space on the disk (kBytes). Together with dskUsedLow composes 64-bit number.
    dskErrorFlag
    1.3.6.1.4.1.2021.9.1.100    		 Error setting signaling that the disk or partition is under the minimum required space configured for it.
    dskErrorMsg
    1.3.6.1.4.1.2021.9.1.101    		 A text description providing a warning and the space left on the disk.

  • Table laTable: 1.3.6.1.4.1.2021.10

    Object Description
    laEntry
    1.3.6.1.4.1.2021.10.1    		 An entry containing a load average and its values.
    laIndex
    1.3.6.1.4.1.2021.10.1.1    		 reference index/row number for each observed loadave.
    laNames
    1.3.6.1.4.1.2021.10.1.2    		 The list of loadave names we're watching.
    laLoad
    1.3.6.1.4.1.2021.10.1.3    		 The 1,5 and 15 minute load averages (one per row).
    laConfig
    1.3.6.1.4.1.2021.10.1.4    		 The watch point for load-averages to signal an error. If the load averages rises above this value, the laErrorFlag below is set.
    laLoadInt
    1.3.6.1.4.1.2021.10.1.5    		 The 1,5 and 15 minute load averages as an integer. This is computed by taking the floating point loadaverage value and multiplying by 100, then converting the value to an integer.
    laLoadFloat
    1.3.6.1.4.1.2021.10.1.6    		 The 1,5 and 15 minute load averages as an opaquely wrapped floating point number.
    laErrorFlag
    1.3.6.1.4.1.2021.10.1.100    		 A Error setting to indicate the load-average has crossed its threshold value defined in the snmpd.conf file. Set to 1 if the threshold is crossed, 0 otherwise.
    laErrMessage
    1.3.6.1.4.1.2021.10.1.101    		 An error message describing the loadaverage and its surpassed watch-point value.

  • Table systemStats: 1.3.6.1.4.1.2021.11

    Object Description
    ssIndex
    1.3.6.1.4.1.2021.11.1    		 Bogus Index. This must always return the integer 1.
    ssErrorName
    1.3.6.1.4.1.2021.11.2    		 Bogus Name. This must always return the string systemStats.
    ssSwapIn
    1.3.6.1.4.1.2021.11.3    		 The average amount of memory swapped in from disk, calculated over the last minute.
    ssSwapOut
    1.3.6.1.4.1.2021.11.4    		 The average amount of memory swapped out to disk, calculated over the last minute.
    ssIOSent
    1.3.6.1.4.1.2021.11.5    		 The average amount of data written to disk or other block device, calculated over the last minute. This object has been deprecated in favour of ssIORawSent(57), which can be used to calculate the same metric, over any specified time period.
    ssIOReceive
    1.3.6.1.4.1.2021.11.6    		 The average amount of data read from disk or other block device, calculated over the last minute. This object has been deprecated in favour of ssIORawReceived(58), which can be used to calculate the same metric, over any specified time period.
    ssSysInterrupts
    1.3.6.1.4.1.2021.11.7    		 The average rate of interrupts processed (including the clock) calculated over the last minute. This object has been deprecated in favour of ssRawInterrupts(59), which can be used to calculate the same metric, over any specified time period.
    ssSysContext
    1.3.6.1.4.1.2021.11.8    		 The average rate of context switches, calculated over the last minute. This object has been deprecated in favour of ssRawContext(60), which can be used to calculate the same metric, over any specified time period.
    ssCpuUser
    1.3.6.1.4.1.2021.11.9    		 The percentage of CPU time spent processing user-level code, calculated over the last minute. This object has been deprecated in favour of ssCpuRawUser(50), which can be used to calculate the same metric, over any specified time period.
    ssCpuSystem
    1.3.6.1.4.1.2021.11.10    		 The percentage of CPU time spent processing system-level code, calculated over the last minute. This object has been deprecated in favour of ssCpuRawSystem(52), which can be used to calculate the same metric, over any specified time period.
    ssCpuIdle
    1.3.6.1.4.1.2021.11.11    		 The percentage of processor time spent idle, calculated over the last minute. This object has been deprecated in favour of ssCpuRawIdle(53), which can be used to calculate the same metric, over any specified time period.
    ssCpuRawUser
    1.3.6.1.4.1.2021.11.50    		 The number of ticks (typically 1/100s) spent processing user-level code. On a multi-processor system, the ssCpuRaw* counters are cumulative over all CPUs, their sum is typically N*100 for N processors.
    ssCpuRawNice
    1.3.6.1.4.1.2021.11.51    		 The number of ticks (typically 1/100s) spent processing reduced-priority code. This object is not implemented on hosts where the underlying operating system does not measure this particular CPU metric. On a multi-processor system, the ssCpuRaw* counters are cumulative over all CPUs, their sum is typically N*100 for N processors.
    ssCpuRawSystem
    1.3.6.1.4.1.2021.11.52    		 The number of ticks (typically 1/100s) spent processing system-level code. On a multi-processor system, the ssCpuRaw* counters are cumulative over all CPUs, their sum is typically N*100 for N processors. This object sometimes is implemented as the combination of the ssCpuRawWait(54) and ssCpuRawKernel(55) counters, care must be taken when summing the overall raw counters.
    ssCpuRawIdle
    1.3.6.1.4.1.2021.11.53    		 The number of ticks (typically 1/100s) spent idle. On a multi-processor system, the ssCpuRaw* counters are cumulative over all CPUs, their sum is typically N*100 for N processors.
    ssCpuRawWait
    1.3.6.1.4.1.2021.11.54    		 The number of ticks (typically 1/100s) spent waiting for IO. This object is not implemented on hosts where the underlying operating system does not measure this particular CPU metric. This time also is included within the ssCpuRawSystem(52) counter. On a multi-processor system, the ssCpuRaw* counters are cumulative over all CPUs, their sum is typically N*100 for N processors.
    ssCpuRawKernel
    1.3.6.1.4.1.2021.11.55    		 The number of ticks (typically 1/100s) spent processing kernel-level code. This object is not implemented on hosts where the underlying operating system does not measure this particular CPU metric. This time also is included within the ssCpuRawSystem(52) counter. On a multi-processor system, the ssCpuRaw* counters are cumulative over all CPUs, their sum is typically N*100 for N processors.
    ssCpuRawInterrupt
    1.3.6.1.4.1.2021.11.56    		 The number of ticks (typically 1/100s) spent processing hardware interrupts. This object is not implemented on hosts where the underlying operating system does not measure this particular CPU metric. On a multi-processor system, the ssCpuRaw* counters are cumulative over all CPUs, their sum is typically N*100 for N processors.
    ssIORawSent
    1.3.6.1.4.1.2021.11.57    		 Number of blocks sent to a block device
    ssIORawReceived
    1.3.6.1.4.1.2021.11.58    		 Number of blocks received from a block device
    ssRawInterrupts
    1.3.6.1.4.1.2021.11.59    		 Number of interrupts processed
    ssRawContexts
    1.3.6.1.4.1.2021.11.60    		 Number of context switches
    ssCpuRawSoftIRQ
    1.3.6.1.4.1.2021.11.61    		 The number of ticks (typically 1/100s) spent processing software interrupts. This object is not implemented on hosts where the underlying operating system does not measure this particular CPU metric. On a multi-processor system, the ssCpuRaw* counters are cumulative over all CPUs, their sum is typically N*100 for N processors.
    ssRawSwapIn
    1.3.6.1.4.1.2021.11.62    		 Number of blocks swapped in
    ssRawSwapOut
    1.3.6.1.4.1.2021.11.63    		 Number of blocks swapped out

  • Table fileTable: 1.3.6.1.4.1.2021.15

    Object Description
    fileEntry
    1.3.6.1.4.1.2021.15.1    		 Entry of file
    fileIndex
    1.3.6.1.4.1.2021.15.1.1    		 Index of file
    fileName
    1.3.6.1.4.1.2021.15.1.2    		 Filename
    fileSize
    1.3.6.1.4.1.2021.15.1.3    		 Size of file (kB)
    fileMax
    1.3.6.1.4.1.2021.15.1.4    		 Limit of filesize (kB)
    fileErrorFlag
    1.3.6.1.4.1.2021.15.1.100    		 Limit exceeded setting
    fileErrorMsg
    1.3.6.1.4.1.2021.15.1.101    		 Filesize error message

  • Table logMatch: 1.3.6.1.4.1.2021.16

    Object Description
    logMatchMaxEntries
    1.3.6.1.4.1.2021.16.1    		 The maximum number of logmatch entries this snmpd daemon can support.
    logMatchTable
    1.3.6.1.4.1.2021.16.2    		 Table of monitored files.
    logMatchEntry
    1.3.6.1.4.1.2021.16.2.1    		 Entry of file
    logMatchIndex
    1.3.6.1.4.1.2021.16.2.1.1    		 Index of logmatch
    logMatchName
    1.3.6.1.4.1.2021.16.2.1.2    		 logmatch instance name
    logMatchFilename
    1.3.6.1.4.1.2021.16.2.1.3    		 filename to be logmatched
    logMatchRegEx
    1.3.6.1.4.1.2021.16.2.1.4    		 regular expression
    logMatchGlobalCounter
    1.3.6.1.4.1.2021.16.2.1.5    		 global count of matches
    logMatchGlobalCounter
    1.3.6.1.4.1.2021.16.2.1.5    		 Description.
    logMatchCurrentCounter
    1.3.6.1.4.1.2021.16.2.1.7    		 Regular expression match counter. This counter resets with each log file rotation.
    logMatchCurrentCounter
    1.3.6.1.4.1.2021.16.2.1.7    		 Description.
    logMatchCounter
    1.3.6.1.4.1.2021.16.2.1.9    		 Regular expression match counter. This counter resets with each read
    logMatchCounter
    1.3.6.1.4.1.2021.16.2.1.9    		 Description.
    logMatchCycle
    1.3.6.1.4.1.2021.16.2.1.11    		 time between updates (if not queried) in seconds
    logMatchErrorFlag
    1.3.6.1.4.1.2021.16.2.1.100    		 error setting: is this line configured correctly?
    logMatchRegExCompilation
    1.3.6.1.4.1.2021.16.2.1.101    		 message of regular expression precompilation

  • Table version: 1.3.6.1.4.1.2021.100

    Object Description
    versionIndex
    1.3.6.1.4.1.2021.100.1    		 Index to mib (always 0)
    versionTag
    1.3.6.1.4.1.2021.100.2    		 CVS tag keyword
    versionDate
    1.3.6.1.4.1.2021.100.3    		 Date string from RCS keyword
    versionCDate
    1.3.6.1.4.1.2021.100.4    		 Date string from ctime()
    versionIdent
    1.3.6.1.4.1.2021.100.5    		 Id string from RCS keyword
    versionConfigureOptions
    1.3.6.1.4.1.2021.100.6    		 Options passed to the configure script when this agent is built.
    versionClearCache
    1.3.6.1.4.1.2021.100.10    		 Set to 1 to clear the exec cache, if enabled
    versionUpdateConfig
    1.3.6.1.4.1.2021.100.11    		 Set to 1 to read-read the config file(s).
    versionRestartAgent
    1.3.6.1.4.1.2021.100.12    		 Set to 1 to restart the agent.
    versionSavePersistentData
    1.3.6.1.4.1.2021.100.13    		 Set to 1 to force the agent to save it's persistent data immediately.
    versionDoDebugging
    1.3.6.1.4.1.2021.100.20    		 Set to 1 to turn debugging statements on in the agent or 0 to turn off.

  • Table snmperrs: 1.3.6.1.4.1.2021.101

    Object Description
    snmperrIndex
    1.3.6.1.4.1.2021.101.1    		 Bogus Index for snmperrs (always 0).
    snmperrNames
    1.3.6.1.4.1.2021.101.2    		 snmp
    snmperrErrorFlag
    1.3.6.1.4.1.2021.101.100    		 A Error setting to indicate trouble with the agent. Goes to 1 if there is an error, 0 if no error.
    snmperrErrMessage
    1.3.6.1.4.1.2021.101.101    		 An error message describing the problem (if one exists).

  • Table mrTable: 1.3.6.1.4.1.2021.102

    Object Description
    mrEntry
    1.3.6.1.4.1.2021.102.1    		 An entry containing a registered mib oid.
    mrIndex
    1.3.6.1.4.1.2021.102.1.1    		 The registry slot of a mibmodule.
    mrModuleName
    1.3.6.1.4.1.2021.102.1.2    		 The module name that registered this OID.

IF-MIB

  • Table ifTable: 1.3.6.1.2.1.2.2

    Object Description
    ifEntry
    1.3.6.1.2.1.2.2.1    		 An entry containing management information applicable to a particular interface.
    ifIndex
    1.3.6.1.2.1.2.2.1.1    		 A unique value, greater than zero, for each interface. It is recommended that values are assigned contiguously starting from 1. The value for each interface sub-layer must remain constant at least from one re-initialization of the entity's network management system to the next re- initialization.
    ifDescr
    1.3.6.1.2.1.2.2.1.2    		 A textual string containing information about the interface. This string must include the name of the manufacturer, the product name and the version of the interface hardware/software.
    ifType
    1.3.6.1.2.1.2.2.1.3    		 The type of interface. Additional values for ifType are assigned by the Internet Assigned Numbers Authority (IANA), through updating the syntax of the IANAifType textual convention.
    ifMtu
    1.3.6.1.2.1.2.2.1.4    		 The size of the largest packet which can be sent/received on the interface, specified in octets. For interfaces that are used for transmitting network datagrams, this is the size of the largest network datagram that can be sent on the interface.
    ifSpeed
    1.3.6.1.2.1.2.2.1.5    		 An estimate of the interface's current bandwidth in bits per second. For interfaces which do not vary in bandwidth or for those where no accurate estimation can be made, this object must contain the nominal bandwidth. If the bandwidth of the interface is greater than the maximum value reportable by this object then this object must report its maximum value (4,294,967,295) and ifHighSpeed must be used to report the interface's speed. For a sub-layer which has no concept of bandwidth, this object must be zero.
    ifPhysAddress
    1.3.6.1.2.1.2.2.1.6    		 The interface's address at its protocol sub-layer. For example, for an 802.x interface, this object normally contains a MAC address. The interface's media-specific MIB must define the bit and byte ordering and the format of the value of this object. For interfaces which do not have such an address (e.g., a serial line), this object must contain an octet string of zero length.
    ifAdminStatus
    1.3.6.1.2.1.2.2.1.7    		 The target state of the interface. The testing(3) state indicates that no operational packets can be passed. When a managed system initializes, all interfaces start with ifAdminStatus in the down(2) state. As a result of either explicit management action or per configuration information retained by the managed system, ifAdminStatus is then changed to either the up(1) or testing(3) states (or remains in the down(2) state).
    ifOperStatus
    1.3.6.1.2.1.2.2.1.8    		 The current operational state of the interface. The testing(3) state indicates that no operational packets can be passed. If ifAdminStatus is down(2) then ifOperStatus must be down(2). If ifAdminStatus is changed to up(1) then ifOperStatus must change to up(1) if the interface is ready to transmit and receive network traffic; it must change to dormant(5) if the interface is waiting for external actions (such as a serial line waiting for an incoming connection); it must remain in the down(2) state if and only if there is a fault that prevents it from going to the up(1) state; it must remain in the notPresent(6) state if the interface has missing (typically, hardware) components.
    ifLastChange
    1.3.6.1.2.1.2.2.1.9    		 The value of sysUpTime at the time the interface entered its current operational state. If the current state is entered prior to the last re-initialization of the local network management subsystem, then this object contains a zero value.
    ifInOctets
    1.3.6.1.2.1.2.2.1.10    		 The total number of octets received on the interface, including framing characters. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifInUcastPkts
    1.3.6.1.2.1.2.2.1.11    		 The number of packets, delivered by this sub-layer to a higher (sub-)layer, which are not addressed to a multicast or broadcast address at this sub-layer. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifInNUcastPkts
    1.3.6.1.2.1.2.2.1.12    		 The number of packets, delivered by this sub-layer to a higher (sub-)layer, which are addressed to a multicast or broadcast address at this sub-layer. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime. This object is deprecated in favour of ifInMulticastPkts and ifInBroadcastPkts.
    ifInDiscards
    1.3.6.1.2.1.2.2.1.13    		 The number of inbound packets which are chosen to be discarded even though no errors are detected to prevent their being deliverable to a higher-layer protocol. One possible reason for discarding such a packet is to free up buffer space. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifInErrors
    1.3.6.1.2.1.2.2.1.14    		 For packet-oriented interfaces, the number of inbound packets that contained errors preventing them from being deliverable to a higher-layer protocol. For character- oriented or fixed-length interfaces, the number of inbound transmission units that contained errors preventing them from being deliverable to a higher-layer protocol. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifInUnknownProtos
    1.3.6.1.2.1.2.2.1.15    		 For packet-oriented interfaces, the number of packets received via the interface which are discarded because of an unknown or unsupported protocol. For character-oriented or fixed-length interfaces that support protocol multiplexing the number of transmission units received via the interface which are discarded because of an unknown or unsupported protocol. For any interface that does not support protocol multiplexing, this counter always is 0. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifOutOctets
    1.3.6.1.2.1.2.2.1.16    		 The total number of octets transmitted out of the interface, including framing characters. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifOutUcastPkts
    1.3.6.1.2.1.2.2.1.17    		 The total number of packets that higher-level protocols requested be transmitted, and which are not addressed to a multicast or broadcast address at this sub-layer, including those that are discarded or not sent. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifOutNUcastPkts
    1.3.6.1.2.1.2.2.1.18    		 The total number of packets that higher-level protocols requested be transmitted, and which are addressed to a multicast or broadcast address at this sub-layer, including those that are discarded or not sent. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime. This object is deprecated in favour of ifOutMulticastPkts and ifOutBroadcastPkts.
    ifOutDiscards
    1.3.6.1.2.1.2.2.1.19    		 The number of outbound packets which are chosen to be discarded even though no errors are detected to prevent their being transmitted. One possible reason for discarding such a packet is to free up buffer space. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifOutErrors
    1.3.6.1.2.1.2.2.1.20    		 For packet-oriented interfaces, the number of outbound packets that are not transmitted because of errors. For character-oriented or fixed-length interfaces, the number of outbound transmission units that are not transmitted because of errors. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifOutQLen
    1.3.6.1.2.1.2.2.1.21    		 The length of the output packet queue (in packets).
    ifSpecific
    1.3.6.1.2.1.2.2.1.22    		 A reference to MIB definitions specific to the particular media being used to realize the interface. It is recommended that this value point to an instance of a MIB object in the media-specific MIB, i.e., that this object have the semantics associated with the InstancePointer textual convention defined in RFC 2579. In fact, it is recommended that the media-specific MIB specify what value ifSpecific must/can take for values of ifType. If no MIB definitions specific to the particular media are available, the value must be set to the OBJECT IDENTIFIER { 0 0 }.

  • Table ifMIB: 1.3.6.1.2.1.31

    Object Description
    ifMIBObjects
    1.3.6.1.2.1.31.1    		 This data type is used to model an administratively assigned name of the owner of a resource. This information is taken from the NVT ASCII character set. It is suggested that this name contain one or more of the following: ASCII form of the manager station's transport address, management station name (e.g., domain name), network management personnel's name, location, or phone number. In some cases the agent itself is the owner of an entry. In these cases, this string shall be set to a string starting with agent.
    ifXTable
    1.3.6.1.2.1.31.1.1    		 A list of interface entries. The number of entries is given by the value of ifNumber. This table contains additional objects for the interface table.
    ifXEntry
    1.3.6.1.2.1.31.1.1.1    		 An entry containing additional management information applicable to a particular interface.
    ifName
    1.3.6.1.2.1.31.1.1.1.1    		 The textual name of the interface. The value of this object must be the name of the interface as assigned by the local device and must be suitable for use in commands entered at the device's console. This might be a text name, such as le0 or a simple port number, such as 1, depending on the interface naming syntax of the device. If several entries in the ifTable together represent a single interface as named by the device, then each has the same value of ifName. Note that for an agent which responds to SNMP queries concerning an interface on some other (proxied) device, then the value of ifName for such an interface is the proxied device's local name for it. If there is no local name, or this object is otherwise not applicable, then this object contains a zero-length string.
    ifInMulticastPkts
    1.3.6.1.2.1.31.1.1.1.2    		 The number of packets, delivered by this sub-layer to a higher (sub-)layer, which are addressed to a multicast address at this sub-layer. For a MAC layer protocol, this includes both Group and Functional addresses. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifInBroadcastPkts
    1.3.6.1.2.1.31.1.1.1.3    		 The number of packets, delivered by this sub-layer to a higher (sub-)layer, which are addressed to a broadcast address at this sub-layer. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifOutMulticastPkts
    1.3.6.1.2.1.31.1.1.1.4    		 The total number of packets that higher-level protocols requested be transmitted, and which are addressed to a multicast address at this sub-layer, including those that are discarded or not sent. For a MAC layer protocol, this includes both Group and Functional addresses. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifOutBroadcastPkts
    1.3.6.1.2.1.31.1.1.1.5    		 The total number of packets that higher-level protocols requested be transmitted, and which are addressed to a broadcast address at this sub-layer, including those that are discarded or not sent. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifHCInOctets
    1.3.6.1.2.1.31.1.1.1.6    		 The total number of octets received on the interface, including framing characters. This object is a 64-bit version of ifInOctets. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifHCInUcastPkts
    1.3.6.1.2.1.31.1.1.1.7    		 The number of packets, delivered by this sub-layer to a higher (sub-)layer, which are not addressed to a multicast or broadcast address at this sub-layer. This object is a 64-bit version of ifInUcastPkts. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifHCInMulticastPkts
    1.3.6.1.2.1.31.1.1.1.8    		 The number of packets, delivered by this sub-layer to a higher (sub-)layer, which are addressed to a multicast address at this sub-layer. For a MAC layer protocol, this includes both Group and Functional addresses. This object is a 64-bit version of ifInMulticastPkts. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifHCInBroadcastPkts
    1.3.6.1.2.1.31.1.1.1.9    		 The number of packets, delivered by this sub-layer to a higher (sub-)layer, which are addressed to a broadcast address at this sub-layer. This object is a 64-bit version of ifInBroadcastPkts. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifHCOutOctets
    1.3.6.1.2.1.31.1.1.1.10    		 The total number of octets transmitted out of the interface, including framing characters. This object is a 64-bit version of ifOutOctets. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifHCOutUcastPkts
    1.3.6.1.2.1.31.1.1.1.11    		 The total number of packets that higher-level protocols requested be transmitted, and which are not addressed to a multicast or broadcast address at this sub-layer, including those that are discarded or not sent. This object is a 64-bit version of ifOutUcastPkts. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifHCOutMulticastPkts
    1.3.6.1.2.1.31.1.1.1.12    		 The total number of packets that higher-level protocols requested be transmitted, and which are addressed to a multicast address at this sub-layer, including those that are discarded or not sent. For a MAC layer protocol, this includes both Group and Functional addresses. This object is a 64-bit version of ifOutMulticastPkts. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifHCOutBroadcastPkts
    1.3.6.1.2.1.31.1.1.1.13    		 The total number of packets that higher-level protocols requested be transmitted, and which are addressed to a broadcast address at this sub-layer, including those that are discarded or not sent. This object is a 64-bit version of ifOutBroadcastPkts. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.
    ifLinkUpDownTrapEnable
    1.3.6.1.2.1.31.1.1.1.14    		 Indicates whether linkUp/linkDown traps must be generated for this interface. By default, this object must have the value enabled(1) for interfaces which do not operate on top of any other interface (as defined in the ifStackTable), and disabled(2) otherwise.
    ifHighSpeed
    1.3.6.1.2.1.31.1.1.1.15    		 An estimate of the interface's current bandwidth in units of 1,000,000 bits per second. If this object reports a value of n then the speed of the interface is somewhere in the range of n-500,000 to n+499,999. For interfaces which do not vary in bandwidth or for those where no accurate estimation can be made, this object must contain the nominal bandwidth. For a sub-layer which has no concept of bandwidth, this object must be zero.
    ifPromiscuousMode
    1.3.6.1.2.1.31.1.1.1.16    		 This object has a value of false(2) if this interface only accepts packets/frames that are addressed to this station. This object has a value of true(1) when the station accepts all packets/frames transmitted on the media. The value true(1) is only legal on certain types of media. If legal, setting this object to a value of true(1) requires the interface to be reset before becoming effective. The value of ifPromiscuousMode does not affect the reception of broadcast and multicast packets/frames by the interface.
    ifConnectorPresent
    1.3.6.1.2.1.31.1.1.1.17    		 This object has the value true(1) if the interface sub-layer has a physical connector and the value false(2) otherwise.
    ifAlias
    1.3.6.1.2.1.31.1.1.1.18    		 This object is an alias name for the interface as specified by a network manager, and provides a non-volatile handle for the interface. On the first instantiation of an interface, the value of ifAlias associated with that interface is the zero-length string. As and when a value is written into an instance of ifAlias through a network management set operation, then the agent must retain the supplied value in the ifAlias instance associated with the same interface for as long as that interface remains instantiated, including across all re-initializations/reboots of the network management system, including those which result in a change of the interface's ifIndex value. An example of the value which a network manager might store in this object for a WAN interface is the (Telco's) circuit number/identifier of the interface. Some agents support write-access only for interfaces having particular values of ifType. An agent which supports write access to this object is required to keep the value in non-volatile storage, but it limits the length of new values depending on how much storage is already occupied by the current values for other interfaces.
    ifCounterDiscontinuityTime
    1.3.6.1.2.1.31.1.1.1.19    		 The value of sysUpTime on the most recent occasion at which any one or more of this interface's counters suffered a discontinuity. The relevant counters are the specific instances associated with this interface of any Counter32 or Counter64 object contained in the ifTable or ifXTable. If no such discontinuities have occurred since the last re- initialization of the local management subsystem, then this object contains a zero value.
    ifStackTable
    1.3.6.1.2.1.31.1.2    		 The table containing information on the relationships between the multiple sub-layers of network interfaces. In particular, it contains information on which sub-layers run 'on top of' which other sub-layers, where each sub-layer corresponds to a conceptual row in the ifTable. For example, when the sub-layer with ifIndex value x runs over the sub-layer with ifIndex value y, then this table contains: ifStackStatus.x.y=active For each ifIndex value, I, which identifies an active interface, there are always at least two instantiated rows in this table associated with I. For one of these rows, I is the value of ifStackHigherLayer; for the other, I is the value of ifStackLowerLayer. (If I is not involved in multiplexing, then these are the only two rows associated with I.) For example, two rows exist even for an interface which has no others stacked on top or below it: ifStackStatus.0.x=active ifStackStatus.x.0=active
    ifStackEntry
    1.3.6.1.2.1.31.1.2.1    		 Information on a particular relationship between two sub-layers, specifying that one sub-layer runs on top of the other sub-layer. Each sub-layer corresponds to a conceptual row in the ifTable.
    ifStackHigherLayer
    1.3.6.1.2.1.31.1.2.1.1    		 The value of ifIndex corresponding to the higher sub-layer of the relationship, i.e., the sub-layer which runs on top of the sub-layer identified by the corresponding instance of ifStackLowerLayer. If there is no higher sub-layer (below the internetwork layer), then this object has the value 0.
    ifStackLowerLayer
    1.3.6.1.2.1.31.1.2.1.2    		 The value of ifIndex corresponding to the lower sub-layer of the relationship, i.e., the sub-layer which runs below the sub-layer identified by the corresponding instance of ifStackHigherLayer. If there is no lower sub-layer, then this object has the value 0.
    ifStackStatus
    1.3.6.1.2.1.31.1.2.1.3    		 The status of the relationship between two sub-layers. Changing the value of this object from active to notInService or destroy has consequences up and down the interface stack. Thus, write access to this object is likely to be inappropriate for some types of interfaces, and many implementations choose not to support write-access for any type of interface.
    ifTestTable
    1.3.6.1.2.1.31.1.3    		 This table contains one entry per interface. It defines objects which allow a network manager to instruct an agent to test an interface for various faults. Tests for an interface are defined in the media-specific MIB for that interface. After invoking a test, the object ifTestResult can be read to determine the outcome. If an agent can not perform the test, ifTestResult is set to indicate. The object ifTestCode can be used to provide further test-specific or interface-specific (or even enterprise-specific) information concerning the outcome of the test. Only one test can be in progress on each interface at any one time. If one test is in progress when another test is invoked, the second test is rejected. Some agents reject a test when a prior test is active on another interface.
    ifTestEntry
    1.3.6.1.2.1.31.1.3.1    		 An entry containing objects for invoking tests on an interface.
    ifTestId
    1.3.6.1.2.1.31.1.3.1.1    		 This object identifies the current invocation of the interface's test.
    ifTestStatus
    1.3.6.1.2.1.31.1.3.1.2    		 This object indicates whether or not some manager currently has the necessary ownership required to invoke a test on this interface. A write to this object is only successful when it changes its value from notInUse(1) to inUse(2). After completion of a test, the agent resets the value back to notInUse(1).
    ifTestType
    1.3.6.1.2.1.31.1.3.1.3    		 A control variable used to start and stop operator- initiated interface tests. Most OBJECT IDENTIFIER values assigned to tests are defined elsewhere, in association with specific types of interface. However, this document assigns a value for a full-duplex loopback test, and defines the special meanings of the subject identifier: noTest OBJECT IDENTIFIER ::= { 0 0 } When the value noTest is written to this object, no action is taken unless a test is in progress, in which case the test is aborted. Writing any other value to this object is only valid when no test is currently in progress, in which case the indicated test is initiated. When read, this object always returns the most recent value that ifTestType is set to. If it has not been set since the last initialization of the network management subsystem on the agent, a value of noTest is returned.
    ifTestResult
    1.3.6.1.2.1.31.1.3.1.4    		 This object contains the result of the most recently requested test, or the value none(1) if no tests have been requested since the last reset. Note that this facility provides no provision for saving the results of one test when starting another, as required if used by multiple managers concurrently.
    ifTestCode
    1.3.6.1.2.1.31.1.3.1.5    		 This object contains a code which contains more specific information on the test result, for example an error-code after a failed test. Error codes and other values this object takes are specific to the type of interface and test. The value has the semantics of either the AutonomousType or InstancePointer textual conventions as defined in RFC 2579. The identifier: testCodeUnknown OBJECT IDENTIFIER ::= { 0 0 } is defined for use if no additional result code is available.
    ifTestOwner
    1.3.6.1.2.1.31.1.3.1.6    		 The entity which currently has the ownership required to invoke a test on this interface.
    ifRcvAddressTable
    1.3.6.1.2.1.31.1.4    		 This table contains an entry for each address (broadcast, multicast, or unicast) for which the system receives packets/frames on a particular interface, except as follows: - for an interface operating in promiscuous mode, entries are only required for those addresses for which the system receives frames are it not operating in promiscuous mode. - for 802.5 functional addresses, only one entry is required, for the address which has the functional address bit ANDed with the bit mask of all functional addresses for which the interface accepts frames. A system is normally able to use any unicast address which corresponds to an entry in this table as a source address.
    ifRcvAddressEntry
    1.3.6.1.2.1.31.1.4.1    		 A list of objects identifying an address for which the system accept packets/frames on the particular interface identified by the index value ifIndex.
    ifRcvAddressAddress
    1.3.6.1.2.1.31.1.4.1.1    		 An address for which the system accepts packets/frames on this entry's interface.
    ifRcvAddressStatus
    1.3.6.1.2.1.31.1.4.1.2    		 This object is used to create and delete rows in the ifRcvAddressTable.
    ifRcvAddressType
    1.3.6.1.2.1.31.1.4.1.3    		 This object has the value nonVolatile(3) for those entries in the table which are valid and are not deleted by the next restart of the managed system. Entries having the value volatile(2) are valid and exist, but have not been saved, that does not exist after the next restart of the managed system. Entries having the value other(1) are valid and exist but are not classified as to whether they continue to exist after the next restart.
    ifTableLastChange
    1.3.6.1.2.1.31.1.5    		 The value of sysUpTime at the time of the last creation or deletion of an entry in the ifTable. If the number of entries has been unchanged since the last re-initialization of the local network management subsystem, then this object contains a zero value.
    ifStackLastChange
    1.3.6.1.2.1.31.1.6    		 The value of sysUpTime at the time of the last change of the (whole) interface stack. A change of the interface stack is defined to be any creation, deletion, or change in value of any instance of ifStackStatus. If the interface stack has been unchanged since the last re-initialization of the local network management subsystem, then this object contains a zero value.
    ifConformance
    1.3.6.1.2.1.31.2    		 The compliance statement for SNMP entities which have network interfaces.
    ifGroups
    1.3.6.1.2.1.31.2.1    		 The compliance statement for SNMP entities which have network interfaces.
    ifGeneralGroup
    1.3.6.1.2.1.31.2.1.1    		 A collection of objects deprecated in favour of ifGeneralInformationGroup.
    ifFixedLengthGroup
    1.3.6.1.2.1.31.2.1.2    		 A collection of objects providing information specific to non-high speed (non-high speed interfaces transmit and receive at speeds less than or equal to 20,000,000 bits/second) character-oriented or fixed-length-transmission network interfaces.
    ifHCFixedLengthGroup
    1.3.6.1.2.1.31.2.1.3    		 A collection of objects providing information specific to high speed (greater than 20,000,000 bits/second) character- oriented or fixed-length-transmission network interfaces.
    ifPacketGroup
    1.3.6.1.2.1.31.2.1.4    		 A collection of objects providing information specific to non-high speed (non-high speed interfaces transmit and receive at speeds less than or equal to 20,000,000 bits/second) packet-oriented network interfaces.
    ifHCPacketGroup
    1.3.6.1.2.1.31.2.1.5    		 A collection of objects providing information specific to high speed (greater than 20,000,000 bits/second but less than or equal to 650,000,000 bits/second) packet-oriented network interfaces.
    ifVHCPacketGroup
    1.3.6.1.2.1.31.2.1.6    		 A collection of objects providing information specific to higher speed (greater than 650,000,000 bits/second) packet- oriented network interfaces.
    ifRcvAddressGroup
    1.3.6.1.2.1.31.2.1.7    		 A collection of objects providing information on the multiple addresses which an interface receives.
    ifTestGroup
    1.3.6.1.2.1.31.2.1.8    		 A collection of objects providing the ability to invoke tests on an interface.
    ifStackGroup
    1.3.6.1.2.1.31.2.1.9    		 The previous collection of objects providing information on the layering of MIB-II interfaces.
    ifGeneralInformationGroup
    1.3.6.1.2.1.31.2.1.10    		 A collection of objects providing information applicable to all network interfaces.
    ifStackGroup2
    1.3.6.1.2.1.31.2.1.11    		 A collection of objects providing information on the layering of MIB-II interfaces.
    ifOldObjectsGroup
    1.3.6.1.2.1.31.2.1.12    		 The collection of objects deprecated from the original MIB- II interfaces group.
    ifCounterDiscontinuityGroup
    1.3.6.1.2.1.31.2.1.13    		 A collection of objects providing information specific to interface counter discontinuities.
    linkUpDownNotificationsGroup
    1.3.6.1.2.1.31.2.1.14    		 The notifications which indicate specific changes in the value of ifOperStatus.
    ifCompliances
    1.3.6.1.2.1.31.2.2    		 The compliance statement for SNMP entities which have network interfaces.
    ifCompliances
    1.3.6.1.2.1.31.2.2    		 A compliance statement defined in a previous version of this MIB module, for SNMP entities which have network interfaces.
    ifCompliance2
    1.3.6.1.2.1.31.2.2.2    		 A compliance statement defined in a previous version of this MIB module, for SNMP entities which have network interfaces.
    ifCompliance3
    1.3.6.1.2.1.31.2.2.3    		 The compliance statement for SNMP entities which have network interfaces.
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