QFX5120-48Y
48 x 1/10/25GbE SFP/SFP+ and 8 x 40/100GbE QSFP+/QSFP28
Juniper QFX5120
Positioning
Inherited from the Juniper QFX5120 family — positioning is family-scoped in the graph
25 GbE data-center leaf and campus distribution fixed 1U switch line. Trident 3 silicon, MACsec on the -48YM variant, Virtual Chassis stacking via uplink ports. Workhorse 25G ToR for non-AI data centers.
Price band: Mid-range
Specifications sourced from Juniper Networks' published datasheets and product documentation.
Identity
What it is and where it sits in the range
- Vendor
- Juniper Networks
- Product family
- Juniper QFX5120
- Form factor
- fixed
- Rack units
- 1
- Launch date
- 2019
- Supported OS
- JunOS
Orderable part numbers
How this platform is bought: the part numbers the vendor's order desk accepts
- QFX5120-48Y-AFI2QFX5120-48Y, 48×25GbE + 8×100GbE, 1U, AC airflow in (back-to-front)
- QFX5120-48Y-AFO2QFX5120-48Y, 48×25GbE + 8×100GbE, 1U, AC airflow out (front-to-back)
- QFX5120-48Y-DC-AFI2QFX5120-48Y, 48×25GbE + 8×100GbE, 1U, DC airflow in
- QFX5120-48Y-DC-AFO2QFX5120-48Y, 48×25GbE + 8×100GbE, 1U, DC airflow out
Ports and throughput
Port counts, speeds and forwarding capacity
- Access ports
- 48
- Port speed (G)
- 25
- Min access speed (G)
- 1
- Max access speed (G)
- 25
- Min uplink speed (G)
- 40
- Max uplink speed (G)
- 100
- Switching capacity (Gbps)
- 2000
- Network module slots
- 0
Alternatives
Products that do the same job: one class up, the same class, or one class down. Same vendor first.
| Platform | Ports | Capacity | Price band |
|---|---|---|---|
| QFX5130-48C Juniper Networks · Juniper QFX 5130 | 48 × 10/25/50/100G SFP56-DD | 16,000 Gbps↑ | High-end |
| DCS-7060CX5-56D8 Arista · Arista 7060CX5 | 56 × 25/100G QSFP+ | 17,600 Gbps↑ | Premium |
| N9336C-SE1 Cisco · Nexus 9300 | 36 × 25/50/100G QSFP28 | 7,200 Gbps↑ | Mid-range to Premium |
| N9K-C9336C-FX2 Cisco · Nexus 9300 | 36 × 10/25/50/100G QSFP28 | 7,200 Gbps↑ | Mid-range to Premium |
| 7050CX3-32C Arista · Arista 7050X3 | 32 × 40/100G | 6,400 Gbps↑ | Mainstream |
| MSN4600 NVIDIA · NVIDIA Spectrum SN4000 | 64 × 10/40/50/100/200G QSFP56 | 25,600 Gbps↑ | Mid-to-high |
| MSN4600C NVIDIA · NVIDIA Spectrum SN4000 | 64 × 10/100G QSFP28 | 12,800 Gbps↑ | Mid-to-high |
| 7220-IXR-D3L Nokia · Nokia 7220 IXR D-Series | 32 × 40/100G QSFP28 | 3,200 Gbps↑ | Mid-range |
| 7220-IXR-D4 Nokia · Nokia 7220 IXR D-Series | 28 × 40/100G QSFP28 | 6,000 Gbps↑ | Mid-range |
| Platform | Ports | Capacity | Price band |
|---|---|---|---|
| 7050SX3-48YC12 Arista · Arista 7050X3 | 48 × 1/10/25G SFP28 | 4,800 Gbps↑ | Mainstream |
| 7050SX3-48YC8 Arista · Arista 7050X3 | 48 × 1/10/25G SFP28 | 4,000 Gbps↑ | Mainstream |
| C9500-48Y4C Cisco · Catalyst 9500 | 48 × 1/10/25G | 3,200 Gbps↑ | Premium |
| N9348Y12C-SE1 Cisco · Nexus 9300 | 32 × 1/10/25G SFP28 + 16 × 10/25/50G SFP56 | 5,600 Gbps↑ | Mid-range to Premium |
| 7220-IXR-D2L Nokia · Nokia 7220 IXR D-Series | 48 × 1/10/25G SFP28 | 2,000 Gbps | Mid-range |
| Platform | Ports | Capacity | Price band |
|---|---|---|---|
| 7050SX3-48C8 Arista · Arista 7050X3 | 48 × 1/10G SFP+ | 2,560 Gbps↑ | Mainstream |
| 7050SX3-48C8C Arista · Arista 7050X3 | 48 × 1/10G | 2,560 Gbps↑ | Mainstream |
| N9K-C93108TC-FX3 Cisco · Nexus 9300 | 48 × 10G | 2,160 Gbps↑ | Mid-range to Premium |
| N9K-C93108TC-FX3P Cisco · Nexus 9300 | 48 × 0.01/0.1/1/2.5/5/10G RJ45 | 2,160 Gbps↑ | Mid-range to Premium |
Power
PoE, supplies and redundancy
- PoE supported
- No
- PSU slots
- 2
- PSUs included
- 2
- Default PSU
- JPSU-650W-AC-AI
- Fan slots
- 5
Scale and performance
Table sizes, latency and stacking limits
- Buffer class
- normal
- Stacking supported
- No
Compatible optics (155)
Transceivers reconciled as compatible, with reach and media
Licence tiers
Tiers defined for this family
Advanced · Advanced 1 · Advanced 2 · Advantage · Premium · Premium 1
Defined for the Juniper QFX5120 family. SKUit selects the tier and term matching the features you choose when it builds the BOM.
Parts and modules
Published parts that fit this platform, each with its own page
- Fan modules (2)
- Rack-mount kits (3)
Other Juniper QFX5120 platforms
Same family, different port counts
About this data
Where the specifications on this page come from
Where does the QFX5120-48Y data come from?
The QFX5120-48Y specifications on this page are sourced from Juniper Networks' published datasheets and product documentation. SKUit extracts and normalises those values into its product catalog, the same data its BOM builder uses. This page summarises them; it is not Juniper Networks' datasheet, and the original documents are published by Juniper Networks.
Create a validated BOM with the QFX5120-48Y
SKUit turns a use case into a complete, orderable bill of materials — the right platform, optics, licences and power, reconciled against the same validated data shown on this page.
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