juniper QFX Series QFX5110-48S
The Juniper QFX5110-48S is a 1U datacenter leaf switch engineered for 10GbE server access and 100GbE uplink connectivity. Providing 48 fixed 10GbE SFP+ ports and 4 fixed 100GbE QSFP28 (or 40GbE QSFP+) uplinks, the QFX5110-48S delivers 1.76 Tbps of switching throughput with native EVPN-VXLAN support. Built on Broadcom Trident II+ silicon, the switch provides an efficient migration path from legacy 40G backbones to modern 100G fabrics. It maintains strong liquidity and steady resale value on the secondary networking market.
Specifications
| Brand | juniper |
|---|---|
| Family | QFX Series |
| Form factor | 1U fixed switch |
| Released | Feb 2017 |
| Ports | 48x 10GbE SFP+ and 4x 100GbE QSFP28 / 40GbE QSFP+ uplinks |
| Switching capacity | 1.76 Tbps / 1.31 Bpps forwarding capacity |
| Overlays | Hardware-accelerated EVPN-VXLAN Layer 2 and Layer 3 gateway support |
| Os architecture | Junos OS with enhanced memory capacity for large BGP and routing tables |
| Power supplies | Dual redundant hot-swappable AC or DC power modules |
Generations
- Previous generation: juniper QFX Series QFX5100-48S
- Next generation: juniper QFX Series QFX5120-48Y
Works together
How the juniper QFX Series QFX5110-48S 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 Superdome Flex Superdome Flex 5U chassis, 4 sockets each, up to 8 chassis
HPE Synergy 660 Gen10 Compute Module full-height compute module
Dell PowerEdge R440 1U rack
Dell PowerEdge R540 2U rack
Dell PowerEdge R640 1U rack
Dell PowerEdge R740 2U rack
Adapters for the server
BCM957416A4160C Broadcom NetXtreme-E BCM57416 Dual-Port 10GBASE-T PCIe 3.0 Ethernet Network Adapter
BCM957504A5041CC Broadcom NetXtreme-E BCM57504 Quad-Port 100GbE QSFP56 PCIe 4.0 Ethernet Network Adapter
540-BBGN Dell Broadcom 57412 Dual Port 10GbE SFP+ PCIe Adapter
540-BBGO Dell Broadcom 57416 Dual Port 10GBASE-T RJ45 PCIe Adapter
Storage
HPE MSA 2050 2U rack enterprise SAN
Lenovo ThinkSystem DS4200 2U rack
Lenovo ThinkSystem DE2000H 2U rack
Dell PowerVault ME4012 2U rack
Dell PowerVault ME4024 2U rack
Dell Unity XT Unity 300 2U rack
Optics
QSFP-100G-SR4 Arista 100GBASE-SR4 QSFP28 Optical Transceiver
SFP-10G-SR-AR Arista 10GBASE-SR SFP+ Optical Transceiver
QSFP-100G-SR4-S Cisco 100GBASE-SR4 QSFP28 Optical Transceiver
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 Superdome Flex Superdome Flex 5U chassis, 4 sockets each, up to 8 chassis
- HPE Synergy 660 Gen10 Compute Module full-height compute module
- Dell PowerEdge R440 1U rack
- Dell PowerEdge R540 2U rack
- Dell PowerEdge R640 1U rack
- Dell PowerEdge R740 2U rack
Adapters for the server
- BCM957416A4160C Broadcom NetXtreme-E BCM57416 Dual-Port 10GBASE-T PCIe 3.0 Ethernet Network Adapter
- BCM957504A5041CC Broadcom NetXtreme-E BCM57504 Quad-Port 100GbE QSFP56 PCIe 4.0 Ethernet Network Adapter
- 540-BBGN Dell Broadcom 57412 Dual Port 10GbE SFP+ PCIe Adapter
- 540-BBGO Dell Broadcom 57416 Dual Port 10GBASE-T RJ45 PCIe Adapter
Storage
- Dell Unity XT Unity 300 2U rack
Dell Unity XT Unity 400 2U rack
Lenovo ThinkSystem DM3000H 2U rack
Lenovo ThinkSystem DM5000H 2U rack
Lenovo ThinkSystem DM7000H 3U rack
Dell Unity XT 380F 2U rack
Optics
- QSFP-100G-SR4 Arista 100GBASE-SR4 QSFP28 Optical Transceiver
- SFP-10G-SR-AR Arista 10GBASE-SR SFP+ Optical Transceiver
- QSFP-100G-SR4-S Cisco 100GBASE-SR4 QSFP28 Optical Transceiver
Hyperconverged cluster
Plan at least two 25GbE ports per node to two switches; all-NVMe clusters often move to 100GbE.
HCI nodes
Dell VxRail P Series P570F 2U rack (1 node)
HPE SimpliVity 380 Gen10 2U rack
HPE SimpliVity 380 Gen9 2U rack
Lenovo ThinkAgile HX3320 1U rack
Adapters for the server
- BCM957416A4160C Broadcom NetXtreme-E BCM57416 Dual-Port 10GBASE-T PCIe 3.0 Ethernet Network Adapter
- BCM957504A5041CC Broadcom NetXtreme-E BCM57504 Quad-Port 100GbE QSFP56 PCIe 4.0 Ethernet Network Adapter
- 540-BBGN Dell Broadcom 57412 Dual Port 10GbE SFP+ PCIe Adapter
- 540-BBGO Dell Broadcom 57416 Dual Port 10GBASE-T RJ45 PCIe Adapter
Optics
- QSFP-100G-SR4 Arista 100GBASE-SR4 QSFP28 Optical Transceiver
- SFP-10G-SR-AR Arista 10GBASE-SR SFP+ Optical Transceiver
- QSFP-100G-SR4-S Cisco 100GBASE-SR4 QSFP28 Optical Transceiver
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 QFX5110-48S.
- Compatibility Juniper Hardware Compatibility Tool (optics and modules)
- Specifications Juniper TechLibrary
- Support Juniper Support
Equivalent models from other brands
FAQ
Can the 100GbE QSFP28 ports operate at 40GbE speeds?
Yes, the QSFP28 uplink ports auto-negotiate to 40GbE when populated with standard QSFP+ optics.
Does the QFX5110-48S support EVPN-VXLAN routing?
Yes, it supports EVPN-VXLAN distributed routing (centralized and symmetric/asymmetric IRB modes).
Buying or selling QFX5110-48S?
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 QFX5110-48S Product Overview, checked 2026-10-27
- Juniper QFX5110-48S Datasheet, checked 2026-10-27