4. SNMP Monitoring

4. SNMP Monitoring
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4. SNMP Monitoring

OID represent the data points where the data for the graphs comes from. Sometimes the reason that a graph is not appearing is because the OID for the particular graph is not valid for the device. You can test this validity using the command line to see if you can return a value. To test the validity of an OID data point giving performance data:

SSH to the Zenoss instance.
Use Username: root
Password: zenoss
Run the command snmp get for one of the OIDs
In this case, use the command:
```
$ snmpget -v1 -cpublic build .1.3.6.1.4.1.2021.4.14.0
```
If the OID is valid it will return a value.
Here are some basic SNMP commands to gather certain information.
1. Walk a basic system MIB.
```
snmpwalk -v1 -cpublic <device name> system
```
2. Walk an interface description
```
snmpwalk -v1 -cpublic <device name> ifDescr
```
3. Get a single value.
```
snmpget -v1 -cpublic <device name> ifDescr.2
```
4. Detailed description of an OID value.
```
snmptranslate -Td RFC1213-MIB::ifDescr
```
5. Convert a name to a raw OID.
```
snmptranslate -On RFC1213-MIB::ifDescr
```
6. Convert a raw OID to a short name
```
snmptranslate -OS .1.3.6.1.2.1.2.2.1.2
```

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Administration Guide

4. SNMP Monitoring