Aruba CX 6400 vs Cisco Catalyst 9400: Modular Chassis Switching Compared

Both are modular campus chassis switches, but the CX 6400 runs the modern, database-driven AOS-CX with VSX redundancy and built-in NAE telemetry, while the Catalyst 9400 runs Cisco IOS XE with StackWise Virtual and the Catalyst Center automation suite. The CX 6400 emphasizes programmability and lower licensing TCO; the 9400 emphasizes ecosystem breadth and supervisor choice.

On raw fabric, the Aruba CX 6400 advertises up to 28.8 Tbps of switching with 2.8 Tbps non-blocking per slot, while the Catalyst 9400 delivers up to 9.6 Tbps of system bandwidth depending on supervisor. In practice both are line-rate for campus core and distribution, so real workloads rarely saturate either platform.

Both support 802.3bt Type 4 PoE. The Catalyst 9400 with Cisco UPOE+ can deliver up to 90W per port, while the CX 6400 supports up to 60W per port via HPE Smart Rate multigigabit line cards. If you have many 75-90W endpoints, the 9400 has an edge; for typical APs, phones, and cameras, both are more than sufficient.

AOS-CX is built on a modern database architecture with a built-in Network Analytics Engine and native REST/Python APIs, which many teams find easier to automate. IOS XE pairs with Catalyst Center for assurance and SD-Access. The right choice depends on whether your team prefers Aruba Central or Catalyst Center as the management plane.

Aruba VSX uses two independent control planes that stay synchronized, allowing hitless software upgrades and continued forwarding if one node fails. Cisco StackWise Virtual presents two chassis as one logical switch with SSO/NSF and ISSU. Both provide robust redundancy; VSX's independent control planes are often praised for simpler, lower-risk upgrades.

The Aruba CX 6400 generally has lower acquisition and licensing TCO because its subscription model is lighter and more predictable than Cisco's tiered DNA/Catalyst Center licensing. Final pricing depends on configuration, line cards, support term, and volume, so request a side-by-side quote for your exact build.

Both can be configured to meet TAA requirements for federal, SLED, and healthcare buyers. As an authorized HPE Aruba Networking reseller, we can source the CX 6400 (and compatible builds of comparable platforms) through GSA MAS (application in progress) and SAP/FAR channels vehicles, with documentation to support your procurement and compliance review.

Yes. Both support standards-based EVPN-VXLAN for spine-leaf and campus fabric designs. The CX 6400 takes an open, standards-first approach via AOS-CX, while the Catalyst 9400 can participate in EVPN-VXLAN and Cisco SD-Access. If you want vendor-neutral fabric portability, the open Aruba approach is often preferred.