Assume two Linux Hosts, that are directly connected to each other cia ethernet and their ethernet interface is always up. I am wondering if there is a tunneling protocol implementation that would satisfy the following:
- Both device would have a virtual interface representing the tunnel link (the tunnel running on-top of the typical TCP/IP link granted by the single cable)
- Either host can set their tunnel interface Up or Down and the other host's interface will match the state (host A sets interface Up then Host B's interface goes Up)
If yes, can you please specify the protocol, if the 'ip' command can handle it and any netlink/syscall interfaces to it?
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