Rack space is a key consideration when planning a network deployment, especially in data centers or wiring closets with limited room. Cisco's Catalyst 9300 series, including the C9300-NW-A-48, is designed with a compact 1U form factor to optimize space and scalability.
What Is a Rack Unit?
A rack unit (RU or U) is a standardized unit of measurement for IT equipment:
1U = 1.75 inches (44.45 mm) in height
Most full-size equipment racks are 42U or 48U high
Switches like the C9300-NW-A-48 are designed to mount horizontally in 19-inch standard racks, occupying 1U of vertical space.
C9300-NW-A-48 Physical Dimensions
Attribute
Specification
Rack Units
1U
Height
1.73 in (4.4 cm)
Width
17.5 in (44.5 cm)
Depth
17.5 in (44.5 cm)
Weight
~16.7 lbs (7.6 kg, with power)
This design ensures compatibility with common rack systems and facilitates airflow and cable management.
Do All Cisco 9300 Switches Use 1U?
Yes. The entire Catalyst 9300 series follows a 1U form factor regardless of whether the unit has PoE, different uplink modules, or is used in a stack configuration. However, the depth and weight may vary slightly depending on the power supplies and fans installed.
If you're comparing models, Cisco's product datasheets or reseller product pages can help verify exact dimensions.
Rack Installation Considerations
Ensure the rack is grounded properly
Maintain sufficient clearance for front-to-back airflow
If stacking, leave enough space to access the stack cables and modules
Confirm the rack depth accommodates the device plus cable slack
For high-density racks, proper planning of port orientation and airflow direction is essential for long-term reliability and ease of maintenance.
Conclusion
The Cisco C9300-NW-A-48 switch occupies 1U of rack space, making it a compact and scalable choice for enterprise access layer deployments. Its standardized size allows for easy integration into existing rack infrastructures while supporting high-density, high-performance network requirements.
If you're planning a rack layout or procuring new switches, this information helps ensure compatibility and efficient space usage.
