Manual:The Dude v6/Probes: Difference between revisions

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Custom probe function update
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This probe will check the voltage level of monitored device using an SNMP protocol, and trigger alert if voltage level drops below 20 V. To achieve this, follow these 2 steps:  
This probe will check the voltage level of monitored device using an SNMP protocol, and trigger alert if voltage level drops below 20 V. To achieve this, follow these 2 steps:  


'''1. Create a new function''', which will check the current voltage level, and return 0 if the value drops below 20 V. Custom_Voltage_Function code example:
1. Create a new function, which will check the current voltage level, and return 0 if the value drops below 20 V. Custom_Voltage_Function code example:
 
[[File:Funct1.JPG]]


<code>if((oid("1.3.6.1.4.1.14988.1.1.3.8.0")>19),"1", "0")</code>
<code>if((oid("1.3.6.1.4.1.14988.1.1.3.8.0")>19),"1", "0")</code>


'''2. Create a new probe''' using this function, where the service will be considered up if the returned value is true (1):
2. Create a new probe using this function, where the service will be considered up if the returned value is true (1):
 
[[File:Funct2.JPG]]


Available: <code>Custom_Voltage_Function()</code>
Available: <code>Custom_Voltage_Function()</code>
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Error: <code>if(Custom_Voltage_Function(), "", "down")</code>  
Error: <code>if(Custom_Voltage_Function(), "", "down")</code>  
The probe is ready, and can be used for device monitoring:
[[File:Funct3.JPG]]




Revision as of 12:27, 30 April 2018

The Probes pane shows the available methods of checking for device services. Probes are used when discovering new devices and when polling existing devices.

Applies to RouterOS: v6.34+

There is a wide choice of predefined Probes, and you can also add new ones. Double-click an existing Probe to see how it was set up, or to adjust it's settings.

Adding new probes

There are several probe types, they are:

  • DNS - Sends DNS resolve request with specified name to resolve, and optionally checks if response matches the specified IP addresses (at least one of them)
  • Function - Performs custom functions to decide if service is up. If the device is up, can graph data of another function
  • ICMP - Sends ICMP echo requests (pings) of specified packet size and TTL. Can try a number of times, and specify retry interval.
  • Logic - Logic probe invokes other probes and performs logic operations based on results
  • Random - Randomly decides if service is up, or not. Can specify up chance. Useful for testing.
  • SNMP - Will query specified OID and service will be up, if a response is received and result of comparison is a logical true
  • TCP - Generic TCP probe, can be used for various protocols. Can send and wait for specific responses
  • UDP - Generic UDP probe, can be used for various protocols. Can send and wait for specific responses

Custom probe using a function

This probe will check the voltage level of monitored device using an SNMP protocol, and trigger alert if voltage level drops below 20 V. To achieve this, follow these 2 steps:

1. Create a new function, which will check the current voltage level, and return 0 if the value drops below 20 V. Custom_Voltage_Function code example:

if((oid("1.3.6.1.4.1.14988.1.1.3.8.0")>19),"1", "0")

2. Create a new probe using this function, where the service will be considered up if the returned value is true (1):

Available: Custom_Voltage_Function()

The error will be trigered if the value is not empty:

Error: if(Custom_Voltage_Function(), "", "down")


The probe is ready, and can be used for device monitoring:


Recommended resources

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