Q. What variables are tested with the SNMP Traffic probe?
A. The SNMP Traffic probe retrieves system and traffic information from a device. The information comes from the system and interfaces groups of SNMP MIB-II.
To view traffic (bytes/second, packets/second, errors/minute) for any interface, right-click a link attached to the interface, and choose Status Window.
The Status window also shows sysLocation, sysContact, and sysUpttime fromt he system group in the device's Status window.
SNMPv1: When you set the SNMP Version to SNMPv1, the following variables are queried:
| Code: |
MIB Variable OID SNMP Version
ifInOctets 1.3.6.1.2.1.2.2.1.10 SNMPv1
ifInUcastPkts 1.3.6.1.2.1.2.2.1.11 SNMPv1
ifInNUcastPkts 1.3.6.1.2.1.2.2.1.12 SNMPv1
ifOutOctets 1.3.6.1.2.1.2.2.1.16 SNMPv1
ifOutUcastPkts 1.3.6.1.2.1.2.2.1.17 SNMPv1
ifOutNUcastPkts 1.3.6.1.2.1.2.2.1.18 SNMPv1 |
InterMapper examines these two variables to decide whether an interface is up or down:
| Code: |
MIB Variable OID SNMP Version
ifAdminStatus 1.3.6.1.2.1.2.2.1.7 SNMPv1
ifOperStatus 1.3.6.1.2.1.2.2.1.8 SNMPv1 |
InterMapper examines these variables to detect error conditions:
| Code: |
MIB Variable OID SNMP Version
ifInDiscards 1.3.6.1.2.1.2.2.1.13 SNMPv1
ifInErrors 1.3.6.1.2.1.2.2.1.14 SNMPv1
ifOutDiscards 1.3.6.1.2.1.2.2.1.19 SNMPv1
ifOutErrors 1.3.6.1.2.1.2.2.1.20 SNMPv1 |
SNMPv2c: When you set the SNMP Version to SNMPv2c, the following variables are queried:
This variable set is used on an initial scan of the device.
| Code: |
MIB Variable OID SNMP Version
ifDescr 1.3.6.1.2.1.2.2.1.2 SNMPv1
ifType 1.3.6.1.2.1.2.2.1.3 SNMPv1
ifMTU 1.3.6.1.2.1.2.2.1.4 SNMPv1
ifSpeed 1.3.6.1.2.1.2.2.1.5 SNMPv1
ifPhysAddress 1.3.6.1.2.1.2.2.1.6 SNMPv1
ifAdminStatus 1.3.6.1.2.1.2.2.1.7 SNMPv1
ifOperStatus 1.3.6.1.2.1.2.2.1.8 SNMPv1
ifName 1.3.6.1.2.1.31.1.1.1.1 SNMPv2c
ifHighSpeed 1.3.6.1.2.1.31.1.1.1.15 SNMPv2c
ifPromiscuousMode 1.3.6.1.2.1.31.1.1.1.16 SNMPv2c
ifConnectorPresent 1.3.6.1.2.1.31.1.1.1.17 SNMPv2c
ifAlias 1.3.6.1.2.1.31.1.1.1.18 SNMPv2c |
This variable set is polled to display statistics for the device's operation.
| Code: |
MIB Variable OID SNMP Version
ifAdminStatus 1.3.6.1.2.1.2.2.1.7 SNMPv1
ifOperStatus 1.3.6.1.2.1.2.2.1.8 SNMPv1
ifLastChange 1.3.6.1.2.1.2.2.1.9 SNMPv1
ifInUcastPkts 1.3.6.1.2.1.2.2.1.11 SNMPv1
ifInErrors 1.3.6.1.2.1.2.2.1.14 SNMPv1
ifInDiscards 1.3.6.1.2.1.2.2.1.13 SNMPv1
ifOutUcastPkts 1.3.6.1.2.1.2.2.1.17 SNMPv1
ifOutErrors 1.3.6.1.2.1.2.2.1.20 SNMPv1
ifOutDiscards 1.3.6.1.2.1.2.2.1.19 SNMPv1
sysUpTime 1.3.6.1.2.1.1.3 SNMPv1
ifHCInOctets 1.3.6.1.2.1.31.1.1.1.6 SNMPv2c
ifHCOutOctets 1.3.6.1.2.1.31.1.1.1.10 SNMPv2c
ifInMulticastPkts 1.3.6.1.2.1.31.1.1.1.2 SNMPv2c
ifInBroadcastPkts 1.3.6.1.2.1.31.1.1.1.3 SNMPv2c
ifOutMulticastPkts 1.3.6.1.2.1.31.1.1.1.4 SNMPv2c
ifOutBroadcastPkts 1.3.6.1.2.1.31.1.1.1.5 SNMPv2c |
Note: In the SNMPv2c , the input and output MulticastPkts and BroadcastPkts MIB variables replace NUcastPkts variables of the SNMPv1 probe, which are deprecated. HCOctets replace the regular Octets counters. Pkts and errors still use the MIB-II 32 bit counters.
Note: The SNMP Traffic probe is known as SNMP MIB-II in earlier versions. It was renamed to reflect its purpose more accurately.
