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Description of problem:
Currently, NetworkManager only allows to specify devices by name or MAC address. Since the device name is not stable and the MAC address requires an inventory about which MAC addresses are used, it would be nice to be able to specify a network card by PCI address, i.e. 0000:00:1f.6.

Additional info:
This could be implemented by a match setting that already exists for interface-name but not yet for PCI ID.

do you know how to obtain the PCI address?

there is:

 - grep PCI_SLOT_NAME /sys/class/net/*/device/uevent

 - ethtool -i eth0
 
     - which uses ETHTOOL_GDRVINFO and "struct ethtool_drvinfo"

 - udevadm info -a -p /sys/class/net/eth0

 - sudo lshw -c network -businfo  

 - lspci -D 

 - udevadm info /sys/class/net/eth0 



Note in `man systemd.link` there is:

       Path=
           A whitespace-separated list of shell-style globs matching the persistent path, as exposed by the udev property "ID_PATH".


and 

  $ udevadm info /sys/class/net/eth0 | grep ID_PATH=



So, we probably want to implement this udev "path".

Upstream merge request:

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/536

test case added:
https://gitlab.freedesktop.org/NetworkManager/NetworkManager-ci/-/merge_requests/581

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (NetworkManager bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:4499