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QFX5241-64OD and QFX5241-64QD System Overview

QFX5241-64OD and QFX5241-64QD Description

The Juniper Networks® QFX5241 Switches are devices with high port density. You can use these switches as end-of-row, leaf or spine devices in an IP fabric architecture. It is an optimal choice as shallow buffer platforms for the spine role in the data center fabric. The 64-port QFX5241 switches are available in the following models:

  • QFX5241-64OD

  • QFX5241-64QD

The QFX5241-64OD and QFX5241-64QD switches have AC and DC power supply units (PSUs) and an airflow out (AFO) cooling system.

For information about the different variants of the QFX5241-64OD and QFX5241-64QD switches, see Variants of QFX5241-64OD and QFX5241-64QD Switches.

Table 1: 64-Port QFX5241 Switch: Key Specifications
Characteristics QFX5241-64OD QFX5241-64QD Notes
Data transmission capability 800 Gbps 800 Gbps The switches offer up to 800 Gbps of data transmission speed through the 800-Gigabit Ethernet (GbE) ports.
Rack units (U) 2 U 2 U The switches have chassis that occupy two rack units (2 U).
Form factor

  • Octal small form-factor pluggable (OSFP)—64 OSFP ports with speeds of up to 800 Gbps.

  • 2 SFP28 ports with speeds of 10 Gbps.

  • Quad small form-factor pluggable double-density (QSFP-DD)—64 QSFP-DD ports with speeds of up to 800 Gbps.

  • 2 SFP28 ports with speeds of 10 Gbps.

  
Ports

  • 64 OSFP ports (800 Gbps)

  • 2 SFP28 ports (10 Gbps)

  • 1 USB 3.0 port

  • 1 RJ-45 console port

  • 1 management port

  • 64 QSFP-DD ports (800 Gbps)

  • 2 SFP28 ports (10 Gbps)

  • 1 USB 3.0 port

  • 1 RJ-45 console port

  • 1 management port

  
Throughput 51.2 terabits per second (Tbps) 51.2 terabits per second (Tbps)  
Core 64 Peregrine SerDes cores 64 Peregrine SerDes cores  
Chipset High-radix class TH5 BCM78900 chipsets High-radix class TH5 BCM78900 chipsets It is a dedicated ASIC for high-bandwidth network switching devices.
Processor Intel 4-core 2.2-GHz Ice Lake D processor Intel 4-core 2.2-GHz Ice Lake D processor The processor drives the control plane of the switch.
Operating system (OS) Junos OS Evolved software Junos OS Evolved software Two internal 480-GB Non-Volatile Memory Express (NVMe) solid-state drives (SSDs) store the Junos OS Evolved software image.
Figure 1: Front View of the QFX5241-64OD Switch Front View of the QFX5241-64OD Switch
Figure 2: Rear View of the QFX5241-64OD AC Switch Rack-mounted server chassis with multiple slots for hot-swappable components like power supplies or cooling fans.
Figure 3: Rear View of the QFX5241-64OD DC Switch Rear View of the QFX5241-64OD DC Switch
Figure 4: Front View of the QFX5241-64QD Switch Front View of the QFX5241-64QD Switch
Figure 5: Rear View of the QFX5241-64QD AC Switch Rack-mounted server chassis with multiple slots for hot-swappable components like power supplies or cooling fans.
Figure 6: Rear View of the QFX5241-64QD DC Switch Rear View of the QFX5241-64QD DC Switch

Benefits

  • Cost reduction—64 ports of 800GbE on a 2-U switch to reduce costs on both space and total power utilization.

  • Increased leaf-spine connectivity options—Choice of connectivity with both OSFP and QSFP-DD variants of 800GbE for leaf-spine connectivity.

  • Advanced telemetry capabilities—Advanced telemetry capabilities to support ECN/PFC counters.

  • Automation support—Load-balancing capability to handle complex flows.

  • Handling of complex flows—Automation of rail-optimized design through Apstra.

Variants of QFX5241-64OD and QFX5241-64QD Switches

The QFX5241-64OD and QFX5241-64QD switches have the following variants:

  • QFX5241-64OD-AO—​64-port switches with 800-Gbps data transmission capability, octal small form-factor pluggable (OSFP) form factor, AC PSU, airflow out (AFO) cooling design, and installation using the QFX5240-2U-4PRMK rack mount kit.

  • QFX5241-64OD-DO​—64-port switches with 800-Gbps data transmission capability, OSFP form factor, DC PSU, AFO cooling, and installation using QFX5240-2U-4PRMK rack mount kit.

  • QFX5241-64QD-AO​—64-port switches with 800-Gbps data transmission capability, quad small form-factor pluggable double density (QSFP-DD) form factor, AC PSU, AFO cooling, and installation using QFX5240-2U-4PRMK rack mount kit.

  • QFX5241-64QD-DO​—64-port switches with 800-Gbps data transmission capability, QSFP-DD form factor, DC PSU, AFO cooling, and installation using QFX5240-2U-4PRMK rack mount kit.

Table 2 provides an overview of the QFX5241-64OD and QFX5241-64QD variants. The table also provides details about the power supply units (PSUs), field-replaceable units (FRUs), and AFO cooling system for the switch.

Table 2: Details of QFX5241-64OD and QFX5241-64QD Switch Variants
Variant Description Airflow Power System

QFX5241-64OD-AO

 

  • 64 OSFP ports (ports 0–63) with port speed of up to 800 Gbps

  • 2 SFP28 ports (ports 64 and 65) with port speed of up to 10 Gbps

  • 1 USB 3.0 port

  • 1 RJ-45 console port

  • 1 management (MGMT) port

Install using the rack mount kit QFX5240-2U-4PRMK.

Four hot-insertable and hot-removable fan modules with front-to-back or airflow out (AFO) airflow, indicated by the label AIR OUT.

Two 12-V, 3000-W AC PSUs with AFO cooling system. The PSUs are hot-insertable and hot-removable FRUs that provide 1 + 1 redundancy and load sharing.

QFX5241-64OD-DO

 

  • 64 OSFP ports (ports 0–63) with port speed of up to 800 Gbps

  • 2 SFP28 ports (ports 64 and 65) with port speed of up to 10 Gbps

  • 1 USB 3.0 port

  • 1 RJ-45 console port

  • 1 management (MGMT) port

Install using the rack mount kit QFX5240-2U-4PRMK.

Four hot-insertable and hot-removable fan modules with front-to-back or airflow out (AFO) airflow, indicated by the label AIR OUT.

Two 12-V, 3000-W DC PSUs with front-to-back airflow. The PSUs are hot-insertable and hot-removable FRUs that provide 1 + 1 redundancy and load sharing.

QFX5241-64QD-AO​

  • 64 QSFP-DD ports (ports 0–63) with port speed of up to 800 Gbps

  • 2 SFP28 ports (ports 64 and 65) with port speed of up to 10 Gbps

  • 1 USB 3.0 port

  • 1 RJ-45 console port

  • 1 management (MGMT) port

Install using the rack mount kit QFX5240-2U-4PRMK.

Four hot-insertable and hot-removable fan modules with front-to-back or airflow out (AFO) airflow, indicated by the label AIR OUT.

Two 12-V, 3000-W AC PSUs with front-to-back airflow. The PSUs are hot-insertable and hot-removable FRUs that provide 1 + 1 redundancy and load sharing.

QFX5241-64QD-DO​

  • 64 QSFP-DD ports (ports 0–63) with port speed of up to 800 Gbps

  • 2 SFP28 ports (ports 64 and 65) with port speed of up to 10 Gbps

  • 1 USB 3.0 port

  • 1 RJ-45 console port

  • 1 management (MGMT) port

Install using the rack mount kit QFX5240-2U-4PRMK.

Four hot-insertable and hot-removable fan modules with front-to-back or airflow out (AFO) airflow, indicated by the label AIR OUT.

Two 12-V, 3000-W DC PSUs with front-to-back airflow. The PSUs are hot-insertable and hot-removable FRUs that provide 1 + 1 redundancy and load sharing.

The QFX5241-64OD and QFX5241-64QD switches have the following spare chassis:

Table 3: QFX5241-64OD and QFX5241-64QD Spare Chassis Details
Chassis Description

QFX5241-64OD-CHAS

Spare chassis without PSUs and fans for the QFX5241-64OD model

QFX5241-64QD-CHAS

Spare chassis without PSUs and fans for the QFX5241-64QD model

System Software

The QFX5241-64OD and QFX5241-64QD switches use the Junos OS Evolved operating system. Junos OS Evolved provides several capabilities that include Layer 2 and Layer 3 switching, routing, and security services. The Junos OS Evolved software is installed on the solid-state drives (SSD) in the switch.

You can manage the switch using the Junos OS Evolved CLI, accessible through the console and out-of-band management ports on the device.

QFX5241 Component Redundancy

The following hardware components provide redundancy on QFX5241 switches:

  • QFX5241-64OD and QFX5241-64QD PSUs—The QFX5241-64OD and QFX5241-64QD PSUs are hot-removable and hot-insertable FRUs. The PSUs provide 1+1 redundancy. When installing or replacing the PSUs, you don't need to shut down the device or interfere with the switching process.

    Table 4: QFX5241-64OD and QFX5241-64QD PSU Specifications
    PSU Item Specification
    QFX5240-PWR-AC-AO (for AC PSU, AFO, 2-U variant)

    Maximum output power

    3000 W ( for input voltage of 215 to 240 V AC)

    2800 W ( for input voltage of 200 to 214 V AC)

    Note: When the system power is over 2800 W, the AC input voltage must be over 215 V AC.

    AC input current rating

    16 A maximum

    AC input voltage

    200 V–240 V AC

    AC input line frequency

    50-60 Hz
    QFX5241-PWR-DC-AO (for DC PSU, AFO, 2-U variant)

    Maximum output power

    3000 W

    DC output voltage

    12 V maximum

    DC input voltage range

    –40 V to –72 V

  • QFX5241-64OD and QFX5241-64QD cooling system—The cooling system consists of four front-to-back (airflow out or AFO) fan modules with each fan module containing two rotors. The cooling system offers N+1 redundancy for the fan modules. The fan modules are hot-insertable and hot-removable field-replaceable units (FRUs).

    Table 5: Cooling System Specifications

    Fan Module

    		Description

    Airflow

    		Fan Replacement Duration

    QFX5240-2U-FANAO

    Four 12 V fan modules. The fan modules of 80 mm x 80 mm x 80 mm dimension are hot-insertable and hot-removable FRUs.

    Airflow out (AFO), also known as front-to-back or port-to-FRU airflow

    2 minutes for ambient temperature of 77 ℉ (25 ℃) .

    30 seconds for ambient temperature of 95 ℉ (35 ℃) to 104 ℉ (40 ℃).

QFX5241-64OD and QFX5241-64QD FRUs

Field-replaceable units (FRUs) are switch components that you can replace at your site. The QFX5241-64OD and QFX5241-64QD FRUs are:

  • Hot-insertable and hot-removable—You can remove and replace these components without powering off the switch or disrupting the switching function.

  • Hot-pluggable—You can remove and replace these components without powering off the switch, but the switching function is interrupted until you replace the component.

The PSUs and fan modules in the QFX5241-64OD and QFX5241-64QD switches are hot-insertable and hot-removable FRUs. That is, you can replace them without turning the switch off or interfering with its functionality. The FRUs such as fan modules and PSUs are installed on the FRU panel at the rear of the QFX5241-64OD and QFX5241-64QD chassis.

Table 6: QFX5241 Field-Replaceable Units
FRUs Description

QFX5240-2U-FANAO

Fan module, with ports-to-FRUs airflow (front-to-back or AFO airflow)

QFX5240-PWR-AC-AO

AC PSU, 3000 W, ports-to-FRUs airflow (front-to-back or AFO airflow)

QFX5241-PWR-DC-AO

DC PSU, 3000 W, ports-to-FRUs airflow (front-to-back or AFO)

QFX5240-2U-4PRMK

Four-post toolless rack mount kit (RMK)

QFX5241-64OD and QFX5241-64QD Chassis Physical Specifications

The QFX5241-64OD and QFX5241-64QD chassis are rigid sheet-metal structures that house the hardware components.

Table 7: Physical Specifications of QFX5241-64OD and QFX5241-64QD Chassis

Variant

Height

Width

Depth

Weight

QFX5241-64OD-AO

3.46 in. (8.78 cm)

19.03 in. (48.33 cm)

25.51 in. (65 cm)

48.50 lb (22 kg) fully loaded without optics

QFX5241-64QD-AO

3.46 in. (8.78 cm)

19.03 in. (48.33 cm)

25.51 in. (65 cm)

48.50 lb (22 kg) fully loaded without optics

QFX5241-64OD-DO

3.46 in. (8.78 cm)

19.03 in. (48.33 cm)

25.51 in. (65 cm)

48.50 lb (22 kg) fully loaded without optics

QFX5241-64QD-DO

3.46 in. (8.78 cm)

19.03 in. (48.33 cm)

25.51 in. (65 cm)

48.50 lb (22 kg) fully loaded without optics