| Platform Parameters |
| System Throughput | 51.2 Tbps unidirectional / 102.4 Tbps bidirectional |
| Max Forwarding Rate | 21.2 Bpps |
| Total Packet Buffer | 165 MB |
| Latency | 700-750 ns (store and forward) |
| Port Density |
| Port density | 64 ports of QSFP-DD 800GbE |
| Max ports with breakout | 64 × 800GbE, 128 × 400GbE, 256 x 200GbE, 320 x 100GbE, 256 x 50GbE |
| Max port density with mixed speeds | 320 (use online port checker to validate mixed speed configurations) |
| Physical Specifications |
| Dimensions (W x H x D) | 17.26 x 3.46 x 25.52 in (43.8 x 8.8 x 64.8 cm) |
| Rack units | 2 U |
| Weight | 22kgs (48.50lbs) fully loaded without optics |
| Cooling | Ports-to-PSU (AFO) 4 hot-pluggable fan modules |
| Power supply redundancy | Redundant (1+1) hot-pluggable 3000W AC (200 to 240V) power supplies |
| Rack mount | Tool less rack mount kit |
| Hot swappable | Power supplies and FAN trays |
| Remote power cycling | Supported |
| Hardware Components |
| Operating system | Junos OS Evolved |
| Switch chip | Broadcom Tomahawk5 |
| CPU | Intel Ice Lake (4 core) |
| Memory | 32GB (16GBx2) of DDR4 |
| Storage | 2x480GB |
| Scalability |
| MAC scale | 136K |
| IPv4 unicast routes (RIB) | 2,000,000 routes |
| IPv4 LPM routes (FIB) | 880,000 |
| IPv4 host routes (FIB) | 880,000 |
| IPv6 unicast routes (RIB) | 2,000,000 routes |
| IPv6 LPM routes (FIB) | 875,000 |
| IPv6 host routes (FIB) | 875,000 |
| Layer 2 Features |
| STP | IEEE 802.1D (802.1D-2004) |
| Rapid Spanning Tree Protocol (RSTP) | IEEE 802.1w |
| MSTP | IEEE 802.1s |
| Bridge protocol data unit (BPDU) protect | Supported |
| Loop protect | Supported |
| Root protect | Supported |
| VLAN | IEEE 802.1Q VLAN trunking |
| Routed VLAN interface (RVI) | Supported |
| Static MAC address assignment for interface | Supported |
| Global MAC learning disable | Supported |
| Link Aggregation and Link Aggregation Control Protocol (LACP) | IEEE 802.3ad |
| IEEE 802.1AB Link Layer Discovery Protocol (LLDP) | Supported |
| Layer 3 Features |
| Static routing | Supported |
| OSPF | v2/v3 |
| Filter-based forwarding | Supported |
| VRRP/VRRPv3 | Supported |
| IPv6 | Supported |
| Virtual routers | Supported |
| Loop-free alternate (LFA) | Supported |
| BGP | Supported |
| IS-IS | Supported |
| Dynamic Host Configuration Protocol (DHCP) relay | v4/v6 (stateless) |
| VRF-aware DHCP | Supported |
| IPv4/IPv6 over GRE tunnels | Supported |
| Multicast |
| Internet Group Management Protocol (IGMP) | v1/v2/v3 |
| Multicast Listener Discovery (MLD) | v2 |
| IGMP proxy, querier | Supported |
| IGMP v1/v2/v3 snooping | Supported |
| Intersubnet multicast using IRB interface | Supported |
| MLD snooping | Supported |
| Protocol Independent Multicast | PIM-SM, PIM-SSM, PIM-DM, PIM-Bidir |
| Multicast Source Discovery Protocol (MSDP) | Supported |
| Quality of Service (QoS) |
| L2 and L3 QoS | Classification, rewrite, queuing |
| Rate limiting: Ingress policing | 1 rate 2 color, 2 rate 3 color |
| Rate limiting: Egress policing | Policer, policer mark down action |
| Rate limiting: Egress shaping | Per queue, per port |
| Hardware queues per port | 10 (8 unicast and 2 multicast) |
| Queuing methods | Strict priority queuing (LLQ), shaped-deficit weighted round robin (SDWRR) |
| Layer 2 classification criteria | Interface, MAC address, Ether type, 802.1p, VLAN |
| Congestion avoidance | WRED, ECN |
| Trust IEEE 802.1p | Supported |
| Configurable shared buffer and buffer monitoring | Supported |
| Congestion Notification Profile | Supported |
| Priority-based flow control (PFC) | IEEE 802.1Qbb |
| High Availability |
| Bidirectional Forwarding Detection (BFD) | Supported |
| Visibility and Analytics |
| Switched Port Analyzer (SPAN) | Supported |
| Remote SPAN (RSPAN) | Supported |
| Encapsulated Remote SPAN (ERSPAN) | Supported |
| sFlow | v5 |
| Junos Telemetry Interface | Supported |
| Management and Operations | Role-based CLI management and access |
| Junos OS Evolved configuration rescue and rollback | Supported |
| Image rollback | Supported |
| SNMP | v1/v2/v3 |
| Junos OS Evolved XML management protocol | Supported |
| Automation and orchestration | Supported |
| Secure zero-touch provisioning (sZTP) (DevID) | Supported |
| Secure-BIOS | Supported |
| Secure-Boot | Supported (*available on QFX5241 switches) |
| Python | Supported |
| Junos OS Evolved event, commit, and OP scripts | Supported |
| Network Services |
| ROCEv2 | Supported |
| DCQCN, PFC, ECN | Supported |
| PFC watchdog | Supported |
| Dynamic load balancing (DLB) | Supported |
| Configurable hash-bucket size | Supported |
| Environmental Ranges |
| Operating temperature | 0° to 40°C @ sea level |
| Storage temperature | -40° to 70°C |
| Operating altitude | Up to 6000 ft/3962 m |
| Relative humidity operating | 5 to 90% non-condensing |
| Relative humidity nonoperating | 5 to 90% non-condensing |
| Seismic | Zone 4 earthquake rating (GR-63 EQ zone 4) |
| Power Consumption |
| Typical Power Consumption (220-240 V) | 616 W |
| Maximum Power Consumption (220-240 V) | 2258 W |
| Power Notes | Max at 40°C with DR optics at 100% load IMIX; Typical at 25°C with DACs at 50% load IMIX, excluding transceivers |
| Warranty |
| Warranty | Juniper standard one-year warranty |
