Can't ping devices

I struggled with this today with two specific devices, a raspberry pi and a debian linux machine, I could ping other devices next to them on the two remote networks, but not each other.

The solution that finally got them to work was as follows:
On both machines run the following to find your ID

sudo zerotier-cli info

200 info **999xxxxx99** 1.6.2 ONLINE

you need to copy that ID

On each machine, stop the zerotier service

sudo systemctl stop zerotier-one

Once they are off, you can delete the peer info on both machines

sudo rm /var/lib/zerotier-one/peers.d/999xxxxx99.peer

After you do that on both machines, restart the zerotier service

sudo systemctl start zerotier-one

They should now be able to communicate within a minute or so.
I hope this saves someone as much time as it took me to write this up. :nerd_face:

1 Like

I can confirm I had similar problem with Zerotier on a debian 9.13 installation.
Could not ping the linux host from a windows host on same zt network.
Looking at traffic (tcpdump) i saw that arp requests for where not been replied.
Applying your solution (deleting peers and restarting service) solved the issue.