Ping Monitoring
Ping service allows:
- Checking IP host status by monitoring its reachability/availability
- Measuring round-trip times.
It operates by sending Internet Control Message Protocol (ICMP) echo requests to the monitored host and collecting statistics of ICMP responses.
 | Using Ping service under Linux requires |
Operation
Refer to Ping Settings subsection for a list of configuration parameters used.
Ping service performs ping request and adds its results to a cache. The size of the cache is defined by service configuration. The oldest results are removed from the cache when it's size is exceeded.
Ping service is denoted Offline if several consecutive requests fail. The number of the requests considered is defined by Number of failed Echo Requests activating offline status configuration parameter. In other words, if any of the most recent requests was successful the services is deemed Online.
The cached results are used to calculate ping statistics: average round-trip time, packet loss rate and last round-trip time. See also Ping Monitoring Results subsection.
Additional Addresses Ping
Sometimes it is necessary to ping a network device via more than only one IP address. The Ping service provides this feature by introducing an option to specify one or more addresses and pinging them along with the address specified as 'primary' one for the device. The settings are specified in the Additional Addresses To Ping, Additional Addresses List, and Additional Addresses Expression fields of the Ping Settings table. The results are provided in the Additional Results sub-table of the Ping Monitoring Results.
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