systemd/rules.d/82-net-auto-link-local.rules
Lennart Poettering ec541c569b hwdb,rules: mark host-to-host network devices as only requiring link local addressing
This is a generalization of this logic:

https://github.com/NetworkManager/NetworkManager/blob/main/data/90-nm-thunderbolt.rules

It applies not just to thunderbolt, but to any kind of device, even
matched by vendor/product, via hwdb.

I added two entries for Prolific PC-to-PC devices (of which I have one
lying around).
2023-10-30 18:57:41 +01:00

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# do not edit this file, it will be overwritten on update
ACTION=="remove", GOTO="net_link_local_end"
SUBSYSTEM!="net", GOTO="net_link_local_end"
# Network interfaces for which only Link-Local communication (i.e. IPv4LL, …)
# makes sense, because they almost certainy will point to another host, not an
# internet router.
# (Note: matches against VID/PID go into 82-net-auto-link-local.hwdb instead)
# Thunderbolt host-to-host connections
DRIVERS=="thunderbolt-net", ENV{ID_NET_AUTO_LINK_LOCAL_ONLY}="1"
LABEL="net_link_local_end"