snmp-oid详解

SNMP

常用

OID

Linux SNMP OID?s for CPU,Memory and Disk Statistics

SNMP stands for Simple Network Management Protocol and consists of three key components:

managed devices, agents, and network-management systems (NMSs). A managed device is a node

that

has

an

SNMP

agent

and

resides

on

a

managed

network.

These

devices

can

be

routers

and

access

server,

switches

and

bridges,

hubs,

computer

hosts,

or

printers.

An

agent

is

a

software

module residing within a device. This agent translates information into a compatible format with

SNMP. An NMS runs monitoring applications. They provide the bulk of processing and memory

resources required for network management.

SNMP MIBs, OIDs Overview

MIB

stands

for

Management

Information

Base

and

is

a

collection

of

information

organized

hierarchically. These are accessed using a protocol such as SNMP. There are two types of MIBs:

scalar

and

tabular.

Scalar

objects

define

a

single

object

instance

whereas

tabular

objects

define

multiple related object instances grouped in MIB tables.

MIB files for specific devices or systems can be downloaded from here

OIDs

or

Object

Identifiers

uniquely

identify

manged

objects

in

a

MIB

hierarchy.

This

can

be

depicted

as

a

tree,

the

levels

of

which

are

assigned

by

different

organizations.

Top

level

MIB

object

IDs

(OIDs)

belong

to

different

standard

organizations.

Vendors

define

private

branches

including managed objects for their own products.

Here is a sample structure of an OID

Iso < /p>

(1).org(3).dod(6).internet(1).private(4) .transition(868).products(2).chassis(4).card(1).sl otCps(2)-

.-cpsSlotSummary( 1).cpsModuleTable(1).cpsModuleEntry(1).cpsModuleMo del(3).3562.3

Most

of

the

people

may

be

looking

for

OID

’

s

for

Linux

OID

’

s

for

CPU,Memory

and

Disk

Statistics for this first you need to install SNMP server and clients. If you want to install SNMP

server and client installation in linux

学习

check here

CPU Statistics

Load

1 minute Load: .1.3.6.1.4.1.2021.10.1.3.1

5 minute Load: .1.3.6.1.4.1.2021.10.1.3.2

15 minute Load: .1.3.6.1.4.1.2021.10.1.3.3

CPU

percentage of user CPU time: .1.3.6.1.4.1.2021.11.9.0

raw user cpu time: .1.3.6.1.4.1.2021.11.50.0

percentages of system CPU time: .1.3.6.1.4.1.2021.11.10.0

raw system cpu time: .1.3.6.1.4.1.2021.11.52.0

percentages of idle CPU time: .1.3.6.1.4.1.2021.11.11.0

raw idle cpu time: .1.3.6.1.4.1.2021.11.53.0

raw nice cpu time: .1.3.6.1.4.1.2021.11.51.0

Memory Statistics

Total Swap Size: .1.3.6.1.4.1.2021.4.3.0

Available Swap Space: .1.3.6.1.4.1.2021.4.4.0

Total RAM in machine: .1.3.6.1.4.1.2021.4.5.0

Total RAM used: .1.3.6.1.4.1.2021.4.6.0

Total RAM Free: .1.3.6.1.4.1.2021.4.11.0

Total RAM Shared: .1.3.6.1.4.1.2021.4.13.0

Total RAM Buffered: .1.3.6.1.4.1.2021.4.14.0

Total Cached Memory: .1.3.6.1.4.1.2021.4.15.0

Disk Statistics

The

needs

to

be

edited.

Add

the

following

(assuming

a

machine

with

a

single

?/?

partition):

disk / 100000 (or)

includeAllDisks 10% for all partitions and disks

The OIDs are as follows

Path where the disk is mounted: .1.3.6.1.4.1.2021.9.1.2.1

Path of the device for the partition: .1.3.6.1.4.1.2021.9.1.3.1

Total size of the disk/partion (kBytes): .1.3.6.1.4.1.2021.9.1.6.1

Available space on the disk: .1.3.6.1.4.1.2021.9.1.7.1

Used space on the disk: .1.3.6.1.4.1.2021.9.1.8.1

Percentage of space used on disk: .1.3.6.1.4.1.2021.9.1.9.1

Percentage of inodes used on disk: .1.3.6.1.4.1.2021.9.1.10.1

System Uptime: .1.3.6.1.2.1.1.3.0

Examples

These Commands you need to run on the SNMP server

Get available disk space for / on the target host

#snmpget -v 1 -

c “community” target_name_or_ip .1.3.6.1.4.1.2021.9.1.7.1

this will return available disk space for the first entry in the ?disk? section of replace 1

with n for the nth entry

Get the 1-minute system load on the target host

#snmpget -v 1 -

c “community” target_name_or_ip .1.3.6.1.4.1.2021.10.1.3.1

Get the 5-minute system load on the target host

#snmpget -v 1 -

c “community” target_name_or_ip .1.3.6.1.4.1.2021.10.1.3.2

Get the 15-minute system load on the target host

#snmpget -v 1 -

c “community” target_name_or_ip .1.3.6.1.4.1.2021.10.1.3.3

Get amount of available swap space on the target host

#snmpget -v 1 -

c “community” target_name_or_ip .1.3.6.1.4.1.2021.4.4.0

Variable Descriptor Object Identifier

System Group

sysDescr 1.3.6.1.2.1.1.1

sysObjectID 1.3.6.1.2.1.1.2

sysUpTime 1.3.6.1.2.1.1.3

sysContact 1.3.6.1.2.1.1.4

sysName 1.3.6.1.2.1.1.5

sysLocation 1.3.6.1.2.1.1.6

sysServices 1.3.6.1.2.1.1.7

Interfaces Group

ifNumber 1.3.6.1.2.1.2.1

ifTable 1.3.6.1.2.1.2.2

ifEntry 1.3.6.1.2.1.2.2.1

ifIndex 1.3.6.1.2.1.2.2.1.1

ifDescr 1.3.6.1.2.1.2.2.1.2