juniper QFX Series QFX5220-128C vs NVIDIA Spectrum-3 SN4600
Side-by-side specifications from the vendors' own documents. The Juniper QFX5220-128C is an ultra-dense 4U datacenter spine switch delivering 128 ports of 40G/100G QSFP28 in a compact rack enclosure. The NVIDIA Spectrum-3 SN4600 is a 2U cloud-scale spine and leaf switch delivering 64 ports of 100G/200G QSFP56 (or 32 ports of 400G QSFP-DD).
| juniper QFX Series QFX5220-128C | NVIDIA Spectrum-3 SN4600 | |
|---|---|---|
| Brand | juniper | NVIDIA |
| Status | current | current |
| Released | Sep 2019 | Apr 2020 |
| Form factor | 4U fixed switch | 2U fixed switch |
| Ports | 128x 40G/100G QSFP28 ports | 64x 100G/200G QSFP56 or 32x 400G QSFP-DD ports |
| Switching capacity | 25.6 Tbps / 8.4 Bpps forwarding capacity | 12.8 Tbps / 8.4 Bpps forwarding capacity |
| Form factor | 4U rack-mounted fixed-configuration chassis | — |
| Density | 128 wire-speed 100GbE ports in just 4U of rack space | — |
| Reliability | N+1 redundant power supplies and hot-swappable cooling modules | — |
| Silicon | — | NVIDIA Spectrum-3 ASIC with 64 MB fully shared dynamic buffer |
| Latency | — | Under 400 nanoseconds low cut-through latency |
| Cooling and power | — | Dual hot-swappable AC/DC power supplies and reversible fans |
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