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 (1).org(3).dod(6).internet(1).private(4).transition(868).products(2).chassis(4).card(1).slotCps(2)
.cpsSlotSummary(1).cpsModuleTable(1).cpsModuleEntry(1).cpsModuleModel(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學習 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 snmpd.conf 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 snmpd.conf; 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
ifType 1.3.6.1.2.1.2.2.1.3
ifMtu 1.3.6.1.2.1.2.2.1.4
ifSpeed 1.3.6.1.2.1.2.2.1.5
ifPhysAddress 1.3.6.1.2.1.2.2.1.6
ifAdminStatus 1.3.6.1.2.1.2.2.1.7
ifOperStatus 1.3.6.1.2.1.2.2.1.8
ifLastChange 1.3.6.1.2.1.2.2.1.9
ifInOctets 1.3.6.1.2.1.2.2.1.10
ifInUcastPkts 1.3.6.1.2.1.2.2.1.11
ifInNUcastPkts 1.3.6.1.2.1.2.2.1.12
ifInDiscards 1.3.6.1.2.1.2.2.1.13
ifInErrors 1.3.6.1.2.1.2.2.1.14
ifInUnknownProtos 1.3.6.1.2.1.2.2.1.15
ifOutOctets 1.3.6.1.2.1.2.2.1.16
ifOutUcastPkts 1.3.6.1.2.1.2.2.1.17
ifOutNUcastPkts 1.3.6.1.2.1.2.2.1.18
ifOutDiscards 1.3.6.1.2.1.2.2.1.19
ifOutErrors 1.3.6.1.2.1.2.2.1.20
ifOutQLen 1.3.6.1.2.1.2.2.1.21
ifSpecific 1.3.6.1.2.1.2.2.1.22
IP Group
ipForwarding 1.3.6.1.2.1.4.1
ipDefaultTTL 1.3.6.1.2.1.4.2
ipInReceives 1.3.6.1.2.1.4.3
ipInHdrErrors 1.3.6.1.2.1.4.4
ipInAddrErrors 1.3.6.1.2.1.4.5
ipForwDatagrams 1.3.6.1.2.1.4.6
ipInUnknownProtos 1.3.6.1.2.1.4.7
ipInDiscards 1.3.6.1.2.1.4.8
ipInDelivers 1.3.6.1.2.1.4.9
ipOutRequests 1.3.6.1.2.1.4.10
ipOutDiscards 1.3.6.1.2.1.4.11
ipOutNoRoutes 1.3.6.1.2.1.4.12
ipReasmTimeout 1.3.6.1.2.1.4.13
ipReasmReqds 1.3.6.1.2.1.4.14
ipReasmOKs 1.3.6.1.2.1.4.15
ipReasmFails 1.3.6.1.2.1.4.16
ipFragsOKs 1.3.6.1.2.1.4.17
ipFragsFails 1.3.6.1.2.1.4.18
ipFragCreates 1.3.6.1.2.1.4.19
ipAddrTable 1.3.6.1.2.1.4.20
ipAddrEntry 1.3.6.1.2.1.4.20.1
ipAdEntAddr 1.3.6.1.2.1.4.20.1.1
ipAdEntIfIndex 1.3.6.1.2.1.4.20.1.2
ipAdEntNetMask 1.3.6.1.2.1.4.20.1.3
ipAdEntBcastAddr 1.3.6.1.2.1.4.20.1.4
ipAdEntReasmMaxSize 1.3.6.1.2.1.4.20.1.5
ICMP Group
icmpInMsgs 1.3.6.1.2.1.5.1
icmpInErrors 1.3.6.1.2.1.5.2
icmpInDestUnreachs 1.3.6.1.2.1.5.3
icmpInTimeExcds 1.3.6.1.2.1.5.4
icmpInParmProbs 1.3.6.1.2.1.5.5
icmpInSrcQuenchs 1.3.6.1.2.1.5.6
icmpInRedirects 1.3.6.1.2.1.5.7
icmpInEchos 1.3.6.1.2.1.5.8
icmpInEchoReps 1.3.6.1.2.1.5.9
icmpInTimestamps 1.3.6.1.2.1.5.10
icmpInTimestampReps 1.3.6.1.2.1.5.11
icmpInAddrMasks 1.3.6.1.2.1.5.12
icmpInAddrMaskReps 1.3.6.1.2.1.5.13
icmpOutMsgs 1.3.6.1.2.1.5.14
icmpOutErrors 1.3.6.1.2.1.5.15
icmpOutDestUnreachs 1.3.6.1.2.1.5.16
icmpOutTimeExcds 1.3.6.1.2.1.5.17
icmpOutParmProbs 1.3.6.1.2.1.5.18
icmpOutSrcQuenchs 1.3.6.1.2.1.5.19
icmpOutRedirects 1.3.6.1.2.1.5.20
icmpOutEchos 1.3.6.1.2.1.5.21
icmpOutEchoReps 1.3.6.1.2.1.5.22
icmpOutTimestamps 1.3.6.1.2.1.5.23
icmpOutTimestampReps 1.3.6.1.2.1.5.24
icmpOutAddrMasks 1.3.6.1.2.1.5.25
icmpOutAddrMaskReps 1.3.6.1.2.1.5.26
TCP Group
tcpRtoAlgorithm 1.3.6.1.2.1.6.1
tcpRtoMin 1.3.6.1.2.1.6.2
tcpRtoMax 1.3.6.1.2.1.6.3
tcpMaxConn 1.3.6.1.2.1.6.4
tcpActiveOpens 1.3.6.1.2.1.6.5
tcpPassiveOpens 1.3.6.1.2.1.6.6
tcpAttemptFails 1.3.6.1.2.1.6.7
tcpEstabResets 1.3.6.1.2.1.6.8
tcpCurrEstab 1.3.6.1.2.1.6.9
tcpInSegs 1.3.6.1.2.1.6.10
tcpOutSegs 1.3.6.1.2.1.6.11
tcpRetransSegs 1.3.6.1.2.1.6.12
tcpConnTable 1.3.6.1.2.1.6.13
tcpConnEntry 1.3.6.1.2.1.6.13.1
tcpConnState 1.3.6.1.2.1.6.13.1.1
tcpConnLocalAddress 1.3.6.1.2.1.6.13.1.2
tcpConnLocalPort 1.3.6.1.2.1.6.13.1.3
tcpConnRemAddress 1.3.6.1.2.1.6.13.1.4
tcpConnRemPort 1.3.6.1.2.1.6.13.1.5
tcpInErrs 1.3.6.1.2.1.6.14
tcpOutRsts 1.3.6.1.2.1.6.15
UDP Group
udpInDatagrams 1.3.6.1.2.1.7.1
udpNoPorts 1.3.6.1.2.1.7.2
udpInErrors 1.3.6.1.2.1.7.3
udpOutDatagrams 1.3.6.1.2.1.7.4
udpTable 1.3.6.1.2.1.7.5
udpEntry 1.3.6.1.2.1.7.5.1
udpLocalAddress 1.3.6.1.2.1.7.5.1.1
udpLocalPort 1.3.6.1.2.1.7.5.1.2
SNMP Group
snmpInPkts 1.3.6.1.2.1.11.1
snmpOutPkts 1.3.6.1.2.1.11.2
snmpInBadVersions 1.3.6.1.2.1.11.3
snmpInBadCommunityNames 1.3.6.1.2.1.11.4
snmpInBadCommunityUses 1.3.6.1.2.1.11.5
snmpInASNParseErrs 1.3.6.1.2.1.11.6
NOT USED 1.3.6.1.2.1.11.7
snmpInTooBigs 1.3.6.1.2.1.11.8
snmpInNoSuchNames 1.3.6.1.2.1.11.9
snmpInBadValues 1.3.6.1.2.1.11.10
snmpInReadOnlys 1.3.6.1.2.1.11.11
snmpInGenErrs 1.3.6.1.2.1.11.12
snmpInTotalReqVars 1.3.6.1.2.1.11.13
snmpInTotalSetVars 1.3.6.1.2.1.11.14
snmpInGetRequests 1.3.6.1.2.1.11.15
snmpInGetNexts 1.3.6.1.2.1.11.16
snmpInSetRequests 1.3.6.1.2.1.11.17
snmpInGetResponses 1.3.6.1.2.1.11.18
snmpInTraps 1.3.6.1.2.1.11.19
snmpOutTooBigs 1.3.6.1.2.1.11.20
snmpOutNoSuchNames 1.3.6.1.2.1.11.21
snmpOutBadValues 1.3.6.1.2.1.11.22
NOT USED 1.3.6.1.2.1.11.23
snmpOutGenErrs 1.3.6.1.2.1.11.24
snmpOutGetRequests 1.3.6.1.2.1.11.25
snmpOutGetNexts 1.3.6.1.2.1.11.26
snmpOutSetRequests 1.3.6.1.2.1.11.27
snmpOutGetResponses 1.3.6.1.2.1.11.28
snmpOutTraps 1.3.6.1.2.1.11.29
snmpEnableAuthenTraps 1.3.6.1.2.1.11.30
======================================
snmp--一般端口流量分析
ifIndex 端口索引號
ifDescr 端口描述
ifType 端口類型
ifMtu 最大傳輸包字節數
ifSpeed 端口速度
ifPhysAddress 物理地址
ifOperStatus 操作狀態
ifLastChange 上次狀態更新時間
*ifInOctets 輸入字節數
*ifInUcastPkts 輸入非廣播包數
*ifInNUcastPkts 輸入廣播包數
*ifInDiscards 輸入包丟棄數
*ifInErrors 輸入包錯誤數
*ifInUnknownProtos 輸入未知協議包數
*ifOutOctets 輸出字節數
*ifOutUcastPkts 輸出非廣播包數
*ifOutNUcastPkts 輸出廣播包數
*ifOutDiscards 輸出包丟棄數
*ifOutErrors 輸出包錯誤數
ifOutQLen 輸出隊長
其中,*號標識的是與網絡流量有關的信息。