From what I read, most of the traffic generated by ZT (when not sending data) is peer-to-peer keepalive data.
And yes, it can be huge.
Zerotier itself does allows low-bandwidth mode but it doesn't seem to be stable:
https://docs.zerotier.com/lbm/
But nothing to be found about this in ROS.
Options I can think of right away:
- Apply simple queue to ZT interface ?
- If your traffic is mostly outbound, apply a schedule so ZT interface is not enabled all the time ?
Other option:
wireguard ... it can be a very quiet protocol. But you will need at least one public accessible IP address (doesn't even have to be static).
However ... I wonder what is being send over that interface on your device ?
AC3 LTE, total ZT usage over 41d, give or take 0.5Gb, that translates to about 0.4Gb / month.
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