Thunderbolt

A MacBook Pro 2016 » MacOS » Monterey connected with ThinkPad L14 Gen3 » Ubuntu » Jammy using Thunderbolt 4, it's called Thunderbolt Net Thunderbolt Net create bridge0, thunderbolt0 network interfaces as respectively for MacOS and Ubuntu
Ubuntu » Self IP: ifconfig -v thunderbolt0|grep inet Ubuntu » Peer IP: arp -a -i thunderbolt0	MacOS  » Self IP: ifconfig -v bridge0|grep inet MacOS  » Peer IP: arp -a -i bridge0

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modprobe thunderbolt-net lspci | grep -i thunder lspci | grep -i usb

ifconfig -v thunderbolt0| grep inet ifconfig -v bridge0 | grep inet ifconfig -v

arp -a -i thunderbolt0 arp -a -i bridge0 arp -a

Playground

ls -lah /sys/bus/thunderbolt/devices/domain0/iommu_dma_protection
cat     /sys/bus/thunderbolt/devices/domain0/iommu_dma_protection

cat     /sys/bus/thunderbolt/devices/0-0/usb4_port1/link
ls -lah /sys/bus/thunderbolt/devices/0-0/usb4_port*

ls -lah /sys/bus/thunderbolt/devices/domain0/security
cat     /sys/bus/thunderbolt/devices/domain0/security

ls -lah /sys/bus/thunderbolt/devices/0-1/
ls -lah /sys/bus/thunderbolt/devices/

cat     /etc/udev/rules.d/99-local.rules
ls -lah /etc/udev/rules.d/

lspci | grep -i thunder
lspci | grep -i usb
lsmod | grep thund
boltctl list -a
lspci -v

References

USB4 » Thunderbolt » Cable Networking USB4 » Thunderbolt » Bridge Network USB4 » Thunderbolt » Linux » v5.15 USB4 » Thunderbolt » Linux » v6.2 USB4 » Thunderbolt » Networking USB4 » Thunderbolt » Technology USB4 » Thunderbolt » boltctl
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