| Feature | Product | Release introduced | 
|---|---|---|
| RADIUS (IPv6) | 5320 Series | Fabric Engine 8.6 | 
| 5420 Series | VOSS 8.4 | |
| 5520 Series | VOSS 8.2.5 | |
| 5720 Series | Fabric Engine 8.7 | |
| RADIUS, community-based users (IPv4) | 5320 Series | Fabric Engine 8.6 | 
| 5420 Series | VOSS 8.4 | |
| 5520 Series | VOSS 8.2.5 | |
| 5720 Series | Fabric Engine 8.7 | |
| RADIUS secure communication using IPSec for IPv4 | 5320 Series | Not Supported | 
| 5420 Series | Not Supported | |
| 5520 Series | Not Supported | |
| 5720 Series | Not Supported | |
| RADIUS secure communication using IPSec for IPv6 | 5320 Series | Not Supported | 
| 5420 Series | Not Supported | |
| 5520 Series | Not Supported | |
| 5720 Series | Not Supported | |
| RADIUS Security (RADSec) | 5320 Series | Fabric Engine 8.6 | 
| 5420 Series | VOSS 8.4 | |
| 5520 Series | VOSS 8.2.5 | |
| 5720 Series | Fabric Engine 8.7 | |
| RFC 5176 – Dynamic Authorization Extensions to RADIUS | 5320 Series | Fabric Engine 8.6 | 
| 5420 Series | VOSS 8.4 | |
| 5520 Series | VOSS 8.2.5 | |
| 5720 Series | Fabric Engine 8.7 | |
| RFC 5997 – RADIUS Reachability Server Status | 5320 Series | Fabric Engine 8.6 | 
| 5420 Series | VOSS 8.4 | |
| 5520 Series | VOSS 8.2.5 | |
| 5720 Series | Fabric Engine 8.7 |