While doing routing updates on my network, we appear to have broken something. I have ZeroTier on my laptop, and 2 pi-zero which act as routers.
The older of the pi-zero was on an old zerotier for some reason, (I think 1.4.x from memory) I have run updates today, and it is now on 1.6.2 however appears to be not connection to the zerotier network correctly.
My 2 other machines are talking through zerotier fine after doing the usual apt-get updates, however they were already on 1.6.2 zerotier.
Can anyone suggest what may be broken by the upgrade?