olemus
tunneldus, mis põhineb pakettidele lisatavatel 802.1Q-märgistel
= tunneling based on adding 802.1Q tags to all the frames

ülevaateid
https://networklessons.com/switching/802-1q-tunneling-q-q-configuration-example
https://www.juniper.net/documentation/en_US/junos/topics/topic-map/q-in-q.html#jd0e39
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/lanswitch/configuration/xe-3se/3850/lnsw-ieee-8021q-tunneling.html