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2023-12-11 1f93a7dfd1f8d5ff7a5c53246c7534fe2332d6f4

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What:        /sys/class/net/<iface>/dsa/tagging
Date:        August 2018
KernelVersion:    4.20
Contact:    netdev@vger.kernel.org
Description:
        String indicating the type of tagging protocol used by the
        DSA slave network device.