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The Juniper Networks EX4550-EM-2QSFP Expansion Module is a high-performance uplink and stacking module designed to enhance the capabilities of Juniper EX4550 Ethernet switches, including the EX4550-32T and EX4550-32F models. Featuring 2 × 40GbE QSFP+ ports, this module provides the high-bandwidth connectivity required for modern data center, enterprise campus, and aggregation layer deployments.
With a total throughput of up to 80 Gbps (full duplex), the EX4550-EM-2QSFP enables seamless high-speed uplinks to core networks or can be used to build a robust Virtual Chassis architecture. When configured as Virtual Chassis Ports (VCPs), the module delivers up to 160 Gbps stacking bandwidth, allowing multiple switches to operate as a single logical device with simplified management and enhanced scalability.
The module supports a wide range of QSFP+ optics, including 40GBASE-SR4 and LR4, as well as direct attach copper (DAC) cables, providing flexibility for both short- and long-distance connectivity. Additionally, with supported Junos OS versions, the ports can be channelized into 4 × 10GbE interfaces, increasing port density and enabling cost-effective network expansion.
Designed for operational efficiency, the EX4550-EM-2QSFP is hot-swappable, allowing installation or replacement without interrupting network operations. Its plug-and-play functionality ensures automatic recognition by Junos OS, minimizing configuration effort and reducing deployment time.
Ideal for organizations seeking to upgrade their switching infrastructure with high-speed 40GbE connectivity and scalable stacking capabilities, the Juniper EX4550-EM-2QSFP delivers the performance, flexibility, and reliability required for next-generation network environments.
Product Specifications – Juniper Networks EX4550-EM-2QSFP 2-Port 40GbE Expansion Module for EX4550 Switch
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| Specification |
Details |
| Product Name |
Juniper Networks EX4550-EM-2QSFP Expansion Module |
| Manufacturer |
Juniper Networks |
| Part Number |
EX4550-EM-2QSFP |
| Product Type |
Expansion Module (Uplink/Stacking Module) |
| Compatible Switches |
Juniper EX4550-32T, EX4550-32F |
| Port Density |
2 × 40 Gigabit Ethernet (40GbE) |
| Interface Type |
QSFP+ (Quad Small Form-factor Pluggable Plus) |
| Maximum Throughput |
Up to 80 Gbps (Full Duplex) |
| Slot Compatibility |
Fits in front or rear expansion slots |
| Optical Compatibility |
40GBASE-SR4, LR4, QSFP+ DAC cables |
| Breakout Support |
4 × 10GbE breakout (with supported Junos versions) |
| Virtual Chassis Support |
Yes |
| Stacking Bandwidth |
Up to 160 Gbps per module (when both ports used as VCPs) |
| Deployment Type |
Data center uplinks, aggregation, campus core |
| Hot-Swappable |
Yes |
| Plug-and-Play Support |
Auto-detected by Junos OS |
| Operating System |
Junos OS |
| Latency |
Low-latency switching (dependent on host switch) |
| Form Factor |
Pluggable expansion module |
| Weight |
Approx. 1.1 lbs (0.5 kg) |
| Cooling |
Passive cooling (via host switch airflow) |
| Power Consumption |
Low power draw (powered by host switch) |
| Use Cases |
High-speed uplinks, switch stacking, data center interconnect |
FAQs:
Q1. How many of these modules can I install in an EX4550 switch?
The EX4550 has two expansion slots (one on the front and one on the rear), meaning you can install up to two EX4550-EM-2QSFP modules for a total of four 40GbE ports.
Q2. Can I use this module for Virtual Chassis (stacking)?
Yes. These ports are frequently used as Virtual Chassis Ports (VCP) to provide a high-speed backplane between switches in a stack.
Q3. Does this module support 100GbE?
No. This module is strictly for 40GbE QSFP+ optics and cables. For 100GbE support, you would need to move to a newer platform like the EX4650 or QFX series.
Q4. Are the QSFP+ transceivers included?
No. The expansion module is a hardware carrier. Transceivers (SR4, LR4) or Direct Attach Copper (DAC) cables must be purchased separately.
Q5. Can I mix this module with the 8x10GbE SFP+ module?
Yes. You can have the 2-port 40GbE module in one slot and the 8-port 10GbE (EX4550-EM-8XSFP) module in the other slot of the same EX4550 switch.
