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The IEEE 802.1ag specification provides for Ethernet connectivity fault management (CFM). One of the major features of CFM is fault isolation using loopback protocol.
| Product / Application | Software | Introduced Release |
|---|---|---|
| EX4400-24X | Junos OS | 23.1R1 |
| EX4650-48Y | Junos OS | 19.4R1 |
| MX204 | Junos OS | 17.4R1 |
| MX240 | Junos OS | 12.2R1 |
| MX301 | Junos OS | 25.4R1 |
| MX304 | Junos OS | 22.2R3 |
| MX480 | Junos OS | 12.2R1 |
| MX960 | Junos OS | 12.2R1 |
| MX10003 | Junos OS | 17.3R1 |
| MX10004 | Junos OS | 22.3R1 |
| MX10008 | Junos OS | 18.2R1 |
| MX10016 | Junos OS | 19.2R1 |
| Next Generation Port Extender | Junos OS | 25.4R1 |
| QFX5120-48Y | Junos OS | 19.4R1 |