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PING stops working, after tracert PING works again



Sometimes ping stops working for a som probes. We can litterately not ping the address from that PRTG machine. A server reboot fixes the problem or a tracert to the address.

Windows 2008 R2 Standard 64bit PRTG: V8.2.1.1931

Feels like this is OS related though.

ping prtg tracert

Created on May 9, 2011 11:01:21 AM

1 Reply




PRTG uses the icmp.dll from Windows, and it's not really clear to us where this one should stumble and then work again after the use of tracert.
If this only effects certain targets, you might want to rather take a closer look at those, respectively the 'hops' in between. Maybe it's the routing (and then tracert updates the routes on the PRTG host), but that's just guess-work I'm afraid (wireshark might help here). A few more tipps:

  • Which targets are effected?
  • What do they have in common (networking hardware, subnets, etc.)?
  • Which infrastructure lies in the way from PRTG to the targets?

best regards.

Created on May 10, 2011 12:22:11 PM by  Torsten Lindner [Paessler Support]

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.