The Juniper QFX5120-48Y-AFI is an advanced, high-density Layer 3 managed switch engineered for today’s flexible data center and high-performance campus environments. Featuring 48 x 1/10/25GbE SFP28 ports with 8 x 40/100GbE QSFP28 uplinks and ultra-low latency, this 1U rack-mountable switch delivers wire-speed throughput and comprehensive protocol support, making it ideal for enterprise-scale server access and network aggregation. With its robust reliability, extensive automation, and full EVPN-VXLAN capabilities, the QFX5120-48Y-AFI offers future-proof scalability for evolving networking needs.
| Specification |
Details |
| Product Name |
Juniper Networks QFX5120-48Y-AFI |
| Device Type |
Layer 3 Managed Stackable Switch, 1U |
| Ports |
48 x 1/10/25GbE SFP28 + 8 x 40/100GbE QSFP28 uplinks |
| Switching Capacity |
2 Tbps (terabits per second) |
| Forwarding Rate |
1.31 Bpps (billion packets per second) |
| Airflow |
Back-to-front (AFI) |
| Performance Features |
Cut-through architecture, ultra-low latency, wire-speed |
| MAC Address Table |
288,000 entries |
| Jumbo Frame Support |
9216 bytes |
| CPU |
Intel, 2.2 GHz |
| RAM / Flash |
16 GB / 64 GB |
| Power Consumption |
260W (max operational) / 650W PSUs (1+1 redundancy) |
| Stackability |
Supported |
| VLANs |
4093 virtual interfaces, 509 spanning tree instances |
| Routing Protocols |
OSPF, BGP, IS-IS, RIP, MPLS, VRRP, IPv4/v6, PIM, IGMP, etc. |
| Management |
CLI, SNMP (v1/v2/v3), Web GUI, Telnet, SSH, Junos, OVSDB |
| Security |
RADIUS, TACACS+, SSH2, MD5, advanced access controls |
| Power Redundancy |
1+1 hot-plug internal PSUs |
| Environmental |
0–40°C operating; RoHS, FCC, CE, IEC compliant |
| Dimensions (H × W × D) |
1.72 x 17.5 x 21.8 in (4.36 x 44.45 x 55.37 cm) |
| Weight |
~10.1 kg (22.3 lbs) (base config)
|
Frequently Asked Questions
Q1: What is the primary use of the QFX5120-48Y-AFI?
A1: Designed for high-density 25GbE server access or network aggregation with 100GbE uplinks, ideal in enterprise data centers and EVPN-VXLAN-based network deployments.
Q2: What airflow direction does the AFI model support?
A2: The QFX5120-48Y-AFI supports back-to-front airflow, suitable for modern hot/cold aisle data center designs.
Q3: Can this switch be stacked?
A3: Yes, it provides physical and virtual stacking for high-availability and centralized management.
Q4: What management protocols are included?
A4: Junos OS management, CLI, SNMP, SSH, Telnet, Web, and RESTful APIs for automation.
Q5: What are the redundancy features?
A5: The switch features 1+1 hot-swappable power supplies and field-replaceable fans for maximum uptime.
