dpd-failure

Must be an interruption on the path to get to all remote locations. I would start checking log at the devices starting from 200B toward the internet. It could be a local ISP's service interruption, which is almost no way to prove unless you've set up something directly against the circuit, keeping monitoring/pinging a destination beyond the ISP.

ceg wrote:

hello everyone!

I have a fortigate 200B with 30 vpns ipsec configured, suddenly all the tunnel fell, and then come up, all the tunnels are now ok, the error in the logs is: dpd_failure.

I have to find the root cause to give a report to my client. I have already investigated the bandwidth: is ok! there was no problem at the time when vpn fell!  the cluster Fortigate 200B has not switched over either.

in this forum I read that someone had this problem but the root cause was not found or not mentioned.

 do you have an idea please, Thank you for your answers!