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Generic Routing Encapsulation (GRE) is a tunneling protocol, developed by Cisco.

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ip6gre tunnel ignores source device?

/bin/bash # Create the GRE tunnel ip tunnel add foo0 mode ip6gre remote f00::1234 local f00::456 ttl 255 dev ens18 ip link set foo0 up ip addr add fafa::1/127 dev foo0 # Add a specific route for the …
warashi nguyen's user avatar