| Feature | Product | Release introduced | 
|---|---|---|
| BFD (IPv4) | 5320 Series | Fabric Engine 8.6 | 
| 5420 Series | VOSS 8.4 | |
| 5520 Series | VOSS 8.2.5 | |
| 5720 Series | Fabric Engine 8.7 | |
| 7520 Series | Fabric Engine 8.10 | |
| 7720 Series | Fabric Engine 8.10 | |
| VSP 4900 Series | VOSS 8.1 | |
| VSP 7400 Series | VOSS 8.1 | |
| BFD (IPv6) | 5320 Series | Fabric Engine 8.6 demonstration feature | 
| 5420 Series | VOSS 8.4 demonstration feature | |
| 5520 Series | VOSS 8.2.5 demonstration feature | |
| 5720 Series | Fabric Engine 8.7 demonstration feature | |
| 7520 Series | Fabric Engine 8.10 demonstration feature | |
| 7720 Series | Fabric Engine 8.10 demonstration feature | |
| VSP 4900 Series | VOSS 8.1 demonstration feature | |
| VSP 7400 Series | VOSS 8.1 demonstration feature | |
| BFD over Fabric Extend Tunnels (IPv4) | 5320 Series | Fabric Engine 8.6 | 
| 5420 Series | VOSS 8.4 | |
| 5520 Series | VOSS 8.2.5 | |
| 5720 Series | Fabric Engine 8.7 | |
| 7520 Series | Fabric Engine 8.10 | |
| 7720 Series | Fabric Engine 8.10 | |
| VSP 4900 Series | VOSS 8.2 | |
| VSP 7400 Series | VOSS 8.2 | 
Use Bidirectional Forwarding Detection (BFD) to provide a failure detection mechanism between two systems.
The following sections provide information and procedures for BFD.