Cisco Nexus 2248TP Fabric Extender

The Cisco Nexus 2248TP Fabric Extender is part of the Cisco Nexus 2000 Series and is engineered to simplify data center access while delivering scalable, centralized control of server connectivity. By extending the Nexus fabric to rack servers, the 2248TP creates a unified server-access platform that reduces cabling complexity and streamlines management. With a design that emphasizes reliability, low latency, and seamless integration with Cisco’s NX-OS ecosystem, this fabric extender helps data centers scale out quickly without sacrificing performance or policy consistency across the network.

• Unified server access with simplified management: The 2248TP extends the Nexus fabric to server racks, enabling consistent policy enforcement and centralized control from the Nexus parent switches. This design reduces the operational overhead of managing disparate access layers and accelerates deployment timelines.
• Dense copper connectivity with scalable uplinks: Equipped with a large bank of 48 copper ports for server access and flexible 10-Gigabit uplinks to the core Nexus fabric, this FEX supports scalable server-to-network topology while preserving performance for virtualization, databases, and enterprise applications.
• NX-OS integration and centralized control: As a Fabric Extender, the 2248TP relies on the parent Nexus switch for the control plane, management, and policy provisioning, enabling consistent security, QoS, and segmentation across all connected servers through a single pane of glass.
• Low latency and high throughput: The FEX-link architecture is designed to minimize latency and maximize throughput between servers and storage, preserving application response times in virtualized environments and dense server pools.
• Reliability, servicing, and flexibility: Built to endure the rigors of data center operation, the 2248TP emphasizes reliability with robust cooling and serviceability options. Depending on SKU, features like hot-swappable components and redundant power can further enhance uptime in demanding deployments.

Technical Details of Cisco Nexus 2248TP Fabric Extender

• Product family: Cisco Nexus 2000 Series Fabric Extenders
• Model: Nexus 2248TP Fabric Extender
• Ports: 48 external copper Ethernet ports for server access (RJ-45)
• Uplinks: 4 x 10-Gigabit SFP+ uplink ports to the parent Nexus switch
• Form factor: 1U rack-mountable enclosure
• Power: Configuration varies by SKU; some configurations support hot-swappable components and redundant power options
• Management: NX-OS-based management via the parent Nexus switch; no independent control plane on the FEX itself
• Compatibility: Designed to work within Cisco’s unified fabric architecture, connecting to Nexus 5000/6000/7000 series switches as an extension of the core fabric
• Security and QoS: Policies, VLANs, and QoS mappings are centrally defined and enforced by the parent switch, ensuring consistent security posture across all connected servers

How to install Cisco Nexus 2248TP Fabric Extender

Plan the topology: Before installing, map server workloads to the appropriate server profiles and determine the required VLANs, QoS settings, and policies to be applied from the parent Nexus switch. Decide which Nexus chassis or spine/leaf pair will act as the fabric’s parent and identify the uplink interfaces that will carry FEX traffic.

Mount and connect: Install the 2248TP in a standard 19-inch rack in a conditioned data center environment. Connect the 4 x 10G SFP+ uplink ports to designated ports on the parent Nexus switch using appropriate fiber or copper media as dictated by your environment. Ensure cable management minimizes bend radii and clutter to preserve performance and air flow.

Attach servers to the FEX: Connect server NICs to the 48 copper ports on the 2248TP. Plan for uniform cabling layouts to simplify troubleshooting and future migrations. Remember that server-side policies and VLAN assignments are applied centrally via the parent Nexus switch.

Configure on the parent switch: Access the NX-OS interface on the parent Nexus switch and define the FEX as a fabric extender by issuing the appropriate commands to register the 2248TP. Map server ports on the FEX to the desired VLANs, QoS policies, and any required security templates. Validate that the FEX ports are bound to the correct uplinks and that server-facing interfaces are correctly placed in the intended port channels if used.

Verify operation and policy propagation: After the FEX is registered, verify connectivity from servers through the 2248TP to upstream networks. Test key performance metrics, ensure VLAN tagging and QoS are consistent with policy definitions on the parent switch, and monitor for any dropped frames or anomalies. Run end-to-end tests for typical workloads to confirm latency, throughput, and reliability meet expectations.

Power and environmental checks: Confirm power connections meet the data center’s redundancy requirements and that cooling and airflow are adequate for sustained operation. If your SKU supports redundant power or hot-swappable components, verify these features are functioning as intended during initial deployment and routine maintenance.

Documentation and baseline configuration: Archive the final configuration, including the FEX registration details, port mappings, VLAN assignments, and QoS policies. Establish a baseline to simplify future upgrades or expansions as server workloads evolve.

Frequently asked questions

• What is a Fabric Extender (FEX) and why would I use one? A Fabric Extender is a remote device that extends the Nexus fabric to servers in the rack while the control plane and policy enforcement remain centralized on the parent Nexus switch. This design reduces cabling, centralizes management, and enables consistent security, QoS, and policy across the data center.
• How does the 2248TP connect to the Nexus fabric? The 2248TP acts as a remote server-access point connected to the Nexus fabric via dedicated FEX uplink interfaces (typically 4 x 10G SFP+), with all control and policy coming from the parent Nexus switch running NX-OS.
• Can I mix 2248TP with other Nexus 2000 Series FEX devices? Yes. The Nexus 2000 Series is designed for interoperability as part of Cisco’s unified fabric, allowing multiple FEX devices to connect to one or more Nexus parent switches to scale server access across the data center.
• Do I need to configure servers differently when using a FEX? Server configurations remain generally consistent, but you should align port assignments, VLANs, and QoS policies on the parent Nexus switch to ensure correct traffic handling and policy enforcement for all connected servers.
• Is the 2248TP suitable for modern workloads? The 2248TP is designed for scalable server access in data centers, supporting virtualization, VDI, databases, and a range of enterprise applications when deployed as part of Cisco’s fabric architecture and NX-OS-based management.
• What are the maintenance considerations? Regular monitoring of uplink health, port status, and environmental conditions is recommended. If your SKU provides hot-swappable components or redundant power, verify these features during maintenance windows to minimize downtime.