The new high performance ping probe known as "icmp"

Discussion created by anders.synstad on Apr 7, 2014
Latest reply on Apr 7, 2014 by ntimm

Basicly, it's icmp only. We, like many other, utilize the tcp checking in
net_connect to do tcp checks against i.e. ssh and rdp in addition to icmp
checking the hosts.


Since we still wan't to do the tcp checks, we'll still need net_connect probe
with the same amount of profiles, and pretty much the same configuration.


Based on some testing I did earlier (but I might have gotten it wrong),
net_connect doesn't fail properly on the tcp checks if it's unable to check
them. However, I need to do more testing regarding this.


Furthermore, the new icmp probe has next to no config settings. What you can
configure is this:



  • loglevel (default 1)
  • timeout in seconds (defailt 2)
  • number of packets (default 3)
  • buffer size (default 64)
  • interval in seconds (default 600)

Per profile:

  • hostname
  • active (checkbox)
  • interval in seconds
  • buffer size
  • TOS Format (default Decimal)
  • TOS Type (default TOS)
  • TOS Value (default 0)

So, they create a brand new probe that is gonna be the new ping flagship, and 

it's utter garbarge when it comes to configuration.


What happened to configuration settings like..

  • schedules.
  • loglevel per profile? Debugging these probes with support for only global loglevel is a pain.
  • No options to override fields like source, target and origin.
  • No sample/alertafter settings to only trigger alarms if profile fails N intervals in a row.
  • No support for retries within the interval.
  • No support for custom messages on profiles.
  • No obvious settings at least for monitoring packet loss.
  • No way of selecting what QoS you want and don't want.

I mean, the new probe doesn't even support the same set of features related to 

icmp that net_connect does.


And the memory usage. According to the doc, it needs: "Memory: 6 GB of RAM for
20000 resources, 8 GB for 30000 resources, 12 GB for 50000 resources." What on
earth are they doing? Storing the entire internet in the probe?


What is going on here?