http://teguhth.blogspot.co.id/2017/06/how-to-calculate-bandwidth-utilization.html
here as example calculation base on value snmpwalk/snmpget
Counter32 Bits
1.3.6.1.2.1.2.2.1 ifEntry NODE
1.3.6.1.2.1.2.2.1.1 ifIndex LEAF InterfaceIndex
1.3.6.1.2.1.2.2.1.2 ifDescr LEAF DisplayString
1.3.6.1.2.1.2.2.1.3 ifType LEAF IANAifType
1.3.6.1.2.1.2.2.1.4 ifMtu LEAF Integer32
1.3.6.1.2.1.2.2.1.5 ifSpeed LEAF Gauge32
1.3.6.1.2.1.2.2.1.7 ifAdminStatus LEAF INTEGER
1.3.6.1.2.1.2.2.1.8 ifOperStatus LEAF INTEGER
1.3.6.1.2.1.2.2.1.9 ifLastChange LEAF TimeTicks
1.3.6.1.2.1.2.2.1.10 ifInOctets LEAF Counter32
1.3.6.1.2.1.2.2.1.11 ifInUcastPkts LEAF Counter32
1.3.6.1.2.1.2.2.1.12 ifInNUcastPkts LEAF Counter32
1.3.6.1.2.1.2.2.1.13 ifInDiscards LEAF Counter32
1.3.6.1.2.1.2.2.1.14 ifInErrors LEAF Counter32
1.3.6.1.2.1.2.2.1.15 ifInUnknownProtos LEAF Counter32
1.3.6.1.2.1.2.2.1.16 ifOutOctets LEAF Counter32
1.3.6.1.2.1.2.2.1.17 ifOutUcastPkts LEAF Counter32
1.3.6.1.2.1.2.2.1.18 ifOutNUcastPkts LEAF Counter32
1.3.6.1.2.1.2.2.1.19 ifOutDiscards LEAF Counter32
1.3.6.1.2.1.2.2.1.20 ifOutErrors LEAF Counter32
1.3.6.1.2.1.2.2.1.21 ifOutQLen LEAF Gauge32
1.3.6.1.2.1.2.2.1.22 ifSpecific LEAF OBJECT IDENTIFIER
Counter64 Bits
1.3.6.1.2.1.31.1.1.1 ifXEntry NODE
1.3.6.1.2.1.31.1.1.1.1 ifName LEAF DisplayString
1.3.6.1.2.1.31.1.1.1.2 ifInMulticastPkts LEAF Counter32
1.3.6.1.2.1.31.1.1.1.3 ifInBroadcastPkts LEAF Counter32
1.3.6.1.2.1.31.1.1.1.4 ifOutMulticastPkts LEAF Counter32
1.3.6.1.2.1.31.1.1.1.5 ifOutBroadcastPkts LEAF Counter32
1.3.6.1.2.1.31.1.1.1.6 ifHCInOctets LEAF Counter64
1.3.6.1.2.1.31.1.1.1.7 ifHCInUcastPkts LEAF Counter64
1.3.6.1.2.1.31.1.1.1.8 ifHCInMulticastPkts LEAF Counter64
1.3.6.1.2.1.31.1.1.1.9 ifHCInBroadcastPkts LEAF Counter64
1.3.6.1.2.1.31.1.1.1.10 ifHCOutOctets LEAF Counter64
1.3.6.1.2.1.31.1.1.1.11 ifHCOutUcastPkts LEAF Counter64
1.3.6.1.2.1.31.1.1.1.12 ifHCOutMulticastPkts LEAF Counter64
1.3.6.1.2.1.31.1.1.1.13 ifHCOutBroadcastPkts LEAF Counter64
1.3.6.1.2.1.31.1.1.1.14 ifLinkUpDownTrapEnable LEAF INTEGER
1.3.6.1.2.1.31.1.1.1.15 ifHighSpeed LEAF Gauge32
1.3.6.1.2.1.31.1.1.1.16 ifPromiscuousMode LEAF TruthValue
1.3.6.1.2.1.31.1.1.1.17 ifConnectorPresent LEAF TruthValue
1.3.6.1.2.1.31.1.1.1.18 ifAlias LEAF DisplayString
1.3.6.1.2.1.31.1.1.1.19 ifCounterDiscontinuityTime LEAF TimeStamp
Example Calculation
1. First find the interface unique ID based on ifName (1.3.6.1.2.1.31.1.1.1.1), ex:
IF-MIB::ifName.11 = STRING: ether11 , Use the .11 above when searching for the ifInOctets OIDs below
[root@TEGUHLab data]# snmpwalk -v 2c -c teguht 10.10.10.10 .1.3.6.1.2.1.2.2.1.1.11
IF-MIB::ifIndex.11 = INTEGER: 11
[root@TEGUHLab data]# snmpwalk -v 2c -c teguht 10.10.10.10 .1.3.6.1.2.1.2.2.1.2.11
IF-MIB::ifDescr.11 = STRING: ether11
[root@TEGUHLab data]# snmpwalk -v 2c -c teguht 10.10.10.10 .1.3.6.1.2.1.2.2.1.5.11
IF-MIB::ifSpeed.11 = Gauge32: 1000000000
[root@TEGUHLab data]# snmpwalk -v 2c -c teguht 10.10.10.10 .1.3.6.1.2.1.2.2.1.10.11
IF-MIB::ifInOctets.11 = Counter32: 1906417075
[root@TEGUHLab data]# snmpwalk -v 2c -c teguht 10.10.10.10 .1.3.6.1.2.1.2.2.1.16.11
IF-MIB::ifOutOctets.11 = Counter32: 2943830328
[root@TEGUHLab data]# snmpwalk -v 2c -c teguht 10.10.10.10 .1.3.6.1.2.1.31.1.1.1.18.11
IF-MIB::ifAlias.11 = STRING: TO UNIVERSE
[root@TEGUHLab data]# snmpwalk -v 2c -c teguht 10.10.10.10 .1.3.6.1.2.1.31.1.1.1.1.11
IF-MIB::ifName.11 = STRING: ether11
[root@TEGUHLab data]# snmpwalk -v 2c -c teguht 10.10.10.10 .1.3.6.1.2.1.31.1.1.1.15.11
IF-MIB::ifHighSpeed.11 = Gauge32: 1000
2. snmpwalk 1 :
[root@TEGUHLab data]# echo " snmpwalk 1"
snmpwalk 1
[root@TEGUHLab data]# sh interfacetest.sh
IF-MIB::ifIndex.11 = INTEGER: 11
IF-MIB::ifDescr.11 = STRING: ether11
IF-MIB::ifSpeed.11 = Gauge32: 1000000000
IF-MIB::ifInOctets.11 = Counter32: 4050383104
IF-MIB::ifOutOctets.11 = Counter32: 2711729319
IF-MIB::ifAlias.11 = STRING: TO UNIVERSE
IF-MIB::ifName.11 = STRING: ether11
IF-MIB::ifHighSpeed.11 = Gauge32: 1000
3. snmpwalk 2 :
[root@TEGUHLab data]# echo " snmpwalk 2"
snmpwalk 2
[root@TEGUHLab data]# sh interfacetest.sh
IF-MIB::ifIndex.11 = INTEGER: 11
IF-MIB::ifDescr.11 = STRING: ether11
IF-MIB::ifSpeed.11 = Gauge32: 1000000000
IF-MIB::ifInOctets.11 = Counter32: 4103953434
IF-MIB::ifOutOctets.11 = Counter32: 2716440431
IF-MIB::ifAlias.11 = STRING: TO UNIVERSE
IF-MIB::ifName.11 = STRING: ether11
IF-MIB::ifHighSpeed.11 = Gauge32: 1000
4. snmpwalk 3 :
[root@TEGUHLab data]# echo " snmpwalk 3"
snmpwalk 3
[root@TEGUHLab data]# sh interfacetest.sh
IF-MIB::ifIndex.11 = INTEGER: 11
IF-MIB::ifDescr.11 = STRING: ether11
IF-MIB::ifSpeed.11 = Gauge32: 1000000000
IF-MIB::ifInOctets.11 = Counter32: 4154317732
IF-MIB::ifOutOctets.11 = Counter32: 2721188883
IF-MIB::ifAlias.11 = STRING: TO UNIVERSE
IF-MIB::ifName.11 = STRING: ether11
IF-MIB::ifHighSpeed.11 = Gauge32: 1000
[root@TEGUHLab data]#
5. Calculation Bandwith Input Output Utilization
Interface <= 1Giga Ethernet using 32bit
= 42,856264 %
Output Utilization(%) = ((2716440431 - 2711729319) * 8 * 100)/1000000000
= 3,7688896 %
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| Infosim Stablenet |
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| Infosim Stablenet |
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| Paessler Prtg |
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| Paessler prtg |
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| Manage Engine Opmanager |
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| Manage Engine Opmanager |
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| Manage Engine Opmanager |
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| Manage Engine Opmanager |
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| Cacti |
Input Utilization(%) = ((4103953434 - 4050383104) * 8 * 100)/(1000 * 10^6)
= 42,856264
Output Utilization(%) = ((2716440431 - 2711729319) * 8 * 100)/(1000 * 10^6)
= 3,7688896 %
 |
| Infosim Stablenet |
 |
| Infosim Stablenet |
 |
| Paessler Prtg |
 |
| Paessler Prtg |
 |
| Manage Engine Opmanager |
 |
| Manage Engine Opmanager |
 |
| Manage Engine Opmanager |
 |
| Manage Engine Opmanager |
 |
| Cacti |
6. Note if ifInOctetsTn < ifInOctetsT1, not allowed and not calculated, ifInOctetsTn must be greater than ifInOctetsT1
7. Note if ifOutOctetsTn < ifOutOctetsTnT1, not allowed and not calculated, ifOutOctetsTn must be greater than ifOutOctetsT1
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