Cisco Nexus 9300 vs Nexus 9500
The Nexus 9300 is a fixed top-of-rack/leaf switch, while the Nexus 9500 is a modular chassis built for spine and aggregation scale. Choose the 9300 for leaf and ToR roles with predictable port counts; choose the 9500 when you need slot-based scalability, very high system capacity, and a long upgrade runway via swappable line cards.
Cisco Nexus 9300
Fixed-configuration data center switch for top-of-rack and leaf roles, in NX-OS or ACI mode.
- Fixed 1RU/2RU configurations, ToR and leaf optimized
- 1/10/25/40/100G port options depending on model
- Up to ~2.56 Tbps internal bandwidth on representative models
- Runs NX-OS standalone or in ACI fabric mode
Cisco Nexus 9500
Modular chassis switch for spine and aggregation, with swappable line cards and fabric modules.
- 4-, 8-, and 16-slot chassis (9504/9508/9516)
- Line cards for 1/10/25/40/50/100/200/400G
- Up to ~60 Tbps system capacity
- NX-OS or ACI mode; investment-protected via line-card upgrades
Cisco Nexus 9300 vs Cisco Nexus 9500: spec comparison
| Spec | Cisco Nexus 9300 | Cisco Nexus 9500 |
|---|---|---|
| Architecture | Fixed configuration | Modular chassis |
| Typical role | Leaf / top-of-rack / middle-of-row | Spine / aggregation / core |
| Chassis options | 1RU / 2RU fixed | 9504 (4-slot), 9508 (8-slot), 9516 (16-slot) |
| Port speeds | 1/10/25/40/100G (model dependent) | 1/10/25/40/50/100/200/400G (line-card dependent) |
| System / switching capacity | Up to ~2.56 Tbps (representative) | Up to ~60 Tbps |
| Line cards / fabric modules | N/A (fixed) | Swappable line cards + fabric modules |
| Operating modes | NX-OS standalone or ACI | NX-OS standalone or ACI |
| Scalability model | Replace unit to scale | Add/upgrade line cards to scale |
| Redundancy | Dual power/fans (model dependent) | Redundant supervisors, fabric, power, fans |
Choose Cisco Nexus 9300 if
Choose the Nexus 9300 for leaf and top-of-rack positions where fixed, predictable port density and a compact 1RU/2RU footprint are ideal. It is the cost-efficient building block of a leaf-spine fabric and supports both NX-OS and ACI.
Choose Cisco Nexus 9500 if
Choose the Nexus 9500 for spine, aggregation, or core where you need slot-based scalability, very high system capacity up to roughly 60 Tbps, redundant supervisors and fabric, and the ability to grow port speeds by swapping line cards over time.
Verdict
These are complementary, not competing: in a typical leaf-spine design the Nexus 9300 sits at the leaf/ToR and the Nexus 9500 at the spine/aggregation. Pick the 9300 for fixed leaf density and the 9500 when modular scale, redundancy, and 400G-capable line-card upgrades justify a chassis. Both support NX-OS and ACI, so they interoperate within one fabric.
Frequently asked questions
What is the difference between the Nexus 9300 and 9500?
The 9300 is a fixed-configuration switch for leaf/top-of-rack roles, while the 9500 is a modular chassis (4/8/16 slot) for spine and aggregation with swappable line cards and far higher system capacity.
Should I use the Nexus 9300 or 9500 as a spine?
Use the Nexus 9500 for spine and aggregation when you need high system capacity, redundant supervisors and fabric, and line-card upgradability. The 9300 is generally positioned at the leaf/ToR layer.
Do the Nexus 9300 and 9500 both support ACI?
Yes. Both run NX-OS standalone or operate in Cisco ACI mode, so they interoperate within the same data center fabric depending on your operating model.
How much capacity does the Nexus 9500 add over the 9300?
Substantial. Representative Nexus 9300 models offer up to about 2.56 Tbps internal bandwidth, while the modular Nexus 9500 scales to roughly 60 Tbps of system capacity with the right line cards and fabric modules.
More Data Center comparisons
Specs are for planning and may change; Uniqcli confirms the current Cisco bill of materials and pricing on your quote. Cisco, Catalyst, Nexus, Meraki, and Firepower are trademarks of Cisco Systems, Inc.; Uniqcli LLC is an independent authorized Cisco partner.