Cisco Nexus 9000 N9K-C9504 Cisco Nexus datacenter switch / module

Brand: Cisco | Category: Network Switches

SKU: CSC-N9K-C9504 | Part #: N9K-C9504 | MPN: N9K-C9504

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The N9K-C9504 is a purpose-built spine or core switch for data centre fabrics where latency is measured in nanoseconds, not milliseconds. Cisco's distributed switching architecture delivers cut-through forwarding with sub-microsecond latency across a full-mesh, non-blocking fabric—a critical requirement for high-frequency trading platforms, AI model training clusters, and real-time analytics workloads. Unlike traditional store-and-forward designs that buffer packets at ingress before deciding their egress port, the N9K-C9504 employs a cell-based forwarding model where traffic moves through dedicated fabric modules in parallel. This architecture eliminates the serialisation bottleneck that plagues conventional monolithic switches. For network engineers architecting spine-leaf topologies or building leaf-spine underlay networks for overlay protocols like VXLAN, the predictable, deterministic latency profile of this Cisco platform removes a major variable from SLA calculations.

At 7U and configured with 4 line card slots and 2 fabric module slots, the N9K-C9504 scales to support hundreds of gigabits or terabits of throughput depending on the installed line card density and speed. The chassis itself is modular by design: supervisors run in pairs with stateful switchover capability, meaning hitless failover during control plane updates or hardware events. Fabric modules hot-swap without interrupting data plane traffic—a distinction that matters when you cannot afford a 30-second fabric rebuild during a maintenance window. Cisco's N9K-C9504 supports both NX-OS and Application Centric Infrastructure (ACI) operating modes, allowing deployment either as a traditional L2/L3 fabric switch or as an ACI spine delivering policy-driven network segmentation and microsecond-scale application steering. The redundant hot-swappable AC and DC power supply options, combined with configurable port-side exhaust and intake airflow, make integration into existing data centre power and cooling infrastructure straightforward.

Protocol support across BGP, OSPF, IS-IS, EIGRP, PIM, EVPN, and Segment Routing variants (SR-MPLS and SRv6 on supported line cards) ensures compatibility with both legacy routing domains and modern intent-based networking architectures. VXLAN and 802.1Q encapsulation are native, with Q-in-Q support for multi-tenant isolation in service provider and large enterprise environments. Security capabilities include MACsec encryption (AES-128 and AES-256 on qualified line cards), role-based access control at the API and CLI level, and control plane policing to prevent DDoS amplification against the switch's management interfaces. Network architects and infrastructure teams at hyperscalers, financial services firms, and AI service providers rely on these features to meet compliance requirements for data isolation and encryption in transit. The N9K-C9504 also supports a comprehensive management and automation stack: NETCONF/YANG, gRPC streaming telemetry, OpenConfig, REST APIs, Python scripting, and integration with Ansible, Puppet, and Chef. This depth of programmability means infrastructure-as-code practices scale naturally across distributed Cisco Nexus deployments, reducing manual configuration drift and accelerating provisioning cycles for new tenant workloads.

Redundancy is built into every layer: dual supervisors with non-stop forwarding and graceful restart ensure that control plane restarts do not interrupt traffic forwarding, while redundant fabric modules guarantee that no single hardware failure cascades into fabric segmentation. The out-of-band management Ethernet and console port provide secure, out-of-band access for troubleshooting and emergency recovery scenarios where the data plane is compromised. Engineers and operations teams favour the N9K-C9504 in environments where uptime is not negotiable—financial trading floors, cloud infrastructure backbones, and AI training clusters where a single dropped packet or missed deadline can mean significant cost. Cisco's extensive ecosystem of certified line cards and fabric modules means the N9K-C9504 can be right-sized for current throughput demands and upgraded incrementally as workload intensity grows, avoiding the capital inefficiency of oversized single-generation designs.

Omnixon Global has distributed Cisco Nexus platforms across data centre operators, enterprise networks, and AI labs throughout the GCC, Asia, and Europe for over a decade. We hold regional stock of the N9K-C9504 and its compatible line card families, backed by technical sales support from engineers who have deployed these fabrics in production. Whether you are building a new spine tier for an existing leaf-spine fabric, consolidating core switches to reduce operational overhead, or architecting the control plane for a containerised or HPC workload cluster, we can provide rapid quoting, hardware validation, and pre-delivery configuration support. Contact us with your topology diagram, expected line card mix, and performance targets—we will deliver a complete bill of materials and timeline tailored to your build schedule.

Fabric Architecture and Performance Specifications

• Full-mesh, non-blocking distributed fabric with sub-microsecond cut-through latency for spine-leaf and core-edge topologies
• 4 line card slots and 2 fabric module slots provide modular scaling from tens to hundreds of gigabits per second throughput
• 7U form factor fits standard 19-inch racks; redundant supervisors with stateful switchover and non-stop forwarding ensure zero-downtime failover
• Supports Cisco NX-OS and ACI (Application Centric Infrastructure) operating modes for traditional L2/L3 or intent-based policy-driven networking
• VXLAN, 802.1Q, Q-in-Q, EVPN, and Segment Routing (SR-MPLS, SRv6) enable modern multi-tenant, multi-cloud, and service provider topologies
• MACsec encryption (AES-128/AES-256), role-based access control, and control plane policing meet compliance and zero-trust security requirements
• NETCONF/YANG, gRPC, OpenConfig, REST APIs, and Ansible/Puppet/Chef integration enable infrastructure-as-code and event-driven automation at scale
• Hot-swappable redundant power supplies (AC and DC), fan trays with configurable airflow, and out-of-band management port support seamless integration into diverse data centre power and cooling environments