juniper QFX Series QFX5210-64C
The Juniper QFX5210-64C is a 2U high-density 100GbE datacenter spine switch powered by Broadcom Tomahawk 2 silicon. Delivering 64 ports of 40G/100G QSFP28 and 12.8 Tbps of aggregate switching capacity, the QFX5210-64C provides immense scale for cloud providers, financial institutions, and enterprise core backbones. Resale demand is strong among enterprise buyers looking to expand 100G fabric bandwidth without upgrading to expensive modular chassis systems.
Specifications
| Brand | juniper |
|---|---|
| Family | QFX Series |
| Form factor | 2U fixed switch |
| Released | Oct 2017 |
| Ports | 64x 40G/100G QSFP28 ports |
| Switching capacity | 12.8 Tbps / 4.2 Bpps wire-speed forwarding performance |
| Silicon | Broadcom Tomahawk 2 packet processing engine |
| Fabric scale | High-density spine for 25G/100G Clos networks supporting up to 256x 25GbE links |
| Redundancy | Dual redundant hot-swappable AC or DC power supplies and hot-swappable fan trays |
Generations
- Previous generation: juniper QFX Series QFX5200-32C
- Next generation: juniper QFX Series QFX5220-32CD
Works together
How the juniper QFX Series QFX5210-64C connects to servers, storage and the network: 3 ways, with the parts and products on each path.
iSCSI and NVMe/TCP over Ethernet
Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.
Servers
HPE Synergy 660 Gen10 Compute Module full-height compute module
HPE ProLiant DL385 Gen10 2U rack
HPE ProLiant DL560 Gen10 2U rack
HPE ProLiant MicroServer Gen10 desktop
HPE Apollo 4200 Gen10 2U rack
HPE Apollo 4510 Gen10 4U rack
Adapters for the server
BCM957504A5041CC Broadcom NetXtreme-E BCM57504 Quad-Port 100GbE QSFP56 PCIe 4.0 Ethernet Network Adapter
540-BDBX Dell NVIDIA Mellanox ConnectX-6 Dx Dual Port 100GbE QSFP56 PCIe Adapter
540-BDCF Dell Intel E810-CQDA2 Dual Port 100GbE QSFP28 PCIe Gen4 Adapter
540-BDCP Dell Broadcom 57508 Dual Port 100GbE QSFP56 PCIe Gen4 Adapter
Storage
Lenovo ThinkSystem DM7100H 4U rack
Dell PowerStore 7000T 2U rack
Lenovo ThinkSystem DM5100F 2U rack
Dell PowerStore 1200T 2U rack
Dell PowerStore 3200T 2U rack
Dell PowerStore 5200T 2U rack
Optics
QSFP-100G-SR4 Arista 100GBASE-SR4 QSFP28 Optical Transceiver
QSFP-100G-SR4-S Cisco 100GBASE-SR4 QSFP28 Optical Transceiver
407-BBOY Dell 100GbE QSFP28 SR4 Optical Transceiver (850nm, 100m MPO-12)
File storage (NFS and SMB)
Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.
Servers
- HPE Synergy 660 Gen10 Compute Module full-height compute module
- HPE ProLiant DL385 Gen10 2U rack
- HPE ProLiant DL560 Gen10 2U rack
- HPE ProLiant MicroServer Gen10 desktop
- HPE Apollo 4200 Gen10 2U rack
- HPE Apollo 4510 Gen10 4U rack
Adapters for the server
- BCM957504A5041CC Broadcom NetXtreme-E BCM57504 Quad-Port 100GbE QSFP56 PCIe 4.0 Ethernet Network Adapter
- 540-BDBX Dell NVIDIA Mellanox ConnectX-6 Dx Dual Port 100GbE QSFP56 PCIe Adapter
- 540-BDCF Dell Intel E810-CQDA2 Dual Port 100GbE QSFP28 PCIe Gen4 Adapter
- 540-BDCP Dell Broadcom 57508 Dual Port 100GbE QSFP56 PCIe Gen4 Adapter
Storage
Dell PowerScale F600 1U rack- Lenovo ThinkSystem DM7100H 4U rack
- Dell PowerStore 7000T 2U rack
- Lenovo ThinkSystem DM5100F 2U rack
Dell PowerScale F900 2U rack
Dell PowerScale H700 4U
Optics
- QSFP-100G-SR4 Arista 100GBASE-SR4 QSFP28 Optical Transceiver
- QSFP-100G-SR4-S Cisco 100GBASE-SR4 QSFP28 Optical Transceiver
- 407-BBOY Dell 100GbE QSFP28 SR4 Optical Transceiver (850nm, 100m MPO-12)
Hyperconverged cluster
Plan at least two 25GbE ports per node to two switches; all-NVMe clusters often move to 100GbE.
HCI nodes
HPE SimpliVity 380 Gen10 2U rack
HPE SimpliVity 380 Gen9 2U rack
HPE SimpliVity 325 Gen10 1U rack
HPE SimpliVity 380 Gen10 G 2U rack
Adapters for the server
- BCM957504A5041CC Broadcom NetXtreme-E BCM57504 Quad-Port 100GbE QSFP56 PCIe 4.0 Ethernet Network Adapter
- 540-BDBX Dell NVIDIA Mellanox ConnectX-6 Dx Dual Port 100GbE QSFP56 PCIe Adapter
- 540-BDCF Dell Intel E810-CQDA2 Dual Port 100GbE QSFP28 PCIe Gen4 Adapter
- 540-BDCP Dell Broadcom 57508 Dual Port 100GbE QSFP56 PCIe Gen4 Adapter
Optics
- QSFP-100G-SR4 Arista 100GBASE-SR4 QSFP28 Optical Transceiver
- QSFP-100G-SR4-S Cisco 100GBASE-SR4 QSFP28 Optical Transceiver
- 407-BBOY Dell 100GbE QSFP28 SR4 Optical Transceiver (850nm, 100m MPO-12)
Plan and size it
- Draw this setup in the topology planner mrplanb.com
- Add up rack power and space rack-density.com
- iSCSI explained mrplanb.com
- Virtualization storage Ledger: scored storage platforms mrplanb.com
- Network monitoring tools compared mrplanb.com
Check compatibility with Juniper
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Juniper has tested with the juniper QFX Series QFX5210-64C.
- Compatibility Juniper Hardware Compatibility Tool (optics and modules)
- Specifications Juniper TechLibrary
- Support Juniper Support
Equivalent models from other brands
FAQ
What is the port density in 25GbE breakout mode?
The QFX5210-64C supports up to 256x 25GbE interfaces using 4x 25G breakout cables across its 64 QSFP28 ports.
Does the switch support EVPN-VXLAN at line rate?
Yes, EVPN-VXLAN packet encapsulation and routing execute at full line rate across all 64 ports.
Buying or selling QFX5210-64C?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Juniper QFX5210-64C Product Overview, checked 2026-10-27
- Juniper QFX5210-64C Datasheet, checked 2026-10-27