, : -- -- loop-free : 9 loop-free . 4, 2020 0 0 0 3 QoS | 5, 2020 0 0 0 5 | 03, 2021 0 0 0 9 | 27, 2020 0 0 0 6 : 14, 2021 2000 0 0 12 09, 2021 0 0 0 16 15, 2021 0 0 0 5 Open Shortest Path First 01, 2021 1000 0 0 15 IS-IS: 02, 2021 0 0 0 15
