• Cisco N3K-C3636C-R 36x100G QSFP28 switch with black and silver accents
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Cisco

Cisco N3K-C3636C-R | Nexus 3600 36-Port 100G QSFP28 Switch, 7.2 Tbps, Layer 3

N3K-C3636C-R

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Description

The Cisco Nexus 3636C-R is a high-density 1RU data center spine switch designed for demanding enterprise and service provider environments. Featuring 36 QSFP28 ports supporting 100/40/25/10 Gigabit Ethernet with MACsec encryption, it delivers 7.2 Tbps switching capacity and 3.34 billion packets per second forwarding. Ideal for leaf-spine topologies, IP storage, big data applications, and edge routing with comprehensive Layer 3 routing protocols and advanced programmability via NX-OS.

Features

Wire-rate Layer 2 and Layer 3 switching across all 36 QSFP28 ports
- MACsec (IEEE 802.1ae) encryption for line-rate secure connectivity
- VXLAN support for network virtualization and overlay architectures
- Virtual PortChannel (vPC) for enhanced redundancy and loop-free topologies
- Comprehensive routing protocol suite: BGP, OSPF, EIGRP, RIPv2, PIM-SM, SSM, MSDP
- Advanced QoS with flexible buffer allocation and traffic prioritization
- Programmability via Cisco NX-API, Python, Puppet, Chef, and OpenStack integration
- Embedded Event Manager (EEM) for automation and policy-based responses
- EtherAnalyzer built-in packet analyzer based on Wireshark for troubleshooting
- Linux containers and Bash shell support for custom applications
- Hot-swappable dual redundant power supplies and fan modules
- Front-to-back and back-to-front airflow options for flexible data center cooling
- Flexible port breakout supporting 4x25G or 4x10G per QSFP28 port
- Large packet buffers and routing table sizes for demanding applications
- Low latency design optimized for real-time and high-frequency trading environments
- Cisco NX-OS Software with modular feature licensing

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

36 x QSFP28 ports supporting 100GbE, 40GbE, and breakout modes (4x25G, 4x10G per port)
- Switching capacity: 7.2 Tbps
- Forwarding rate: 3.34 billion packets per second (Bpps)
- Layer 2 and Layer 3 wire-rate performance on all ports
- MACsec (IEEE 802.1ae) encryption support for secure data transmission
- Memory: 32 GB DRAM, 8-core CPU
- Form factor: 1RU rack-mountable chassis
- Dimensions: 17.3 in W x 31.2 in D x 1.7 in H (43.9 cm x 79.2 cm x 4.3 cm)
- Weight: 35.63 lb (16.2 kg) approximate
- Power consumption: 921W typical with dual redundant 2KW AC power supplies
- Airflow: Supports both port-side intake and port-side exhaust (back-to-front and front-to-back)
- Cooling: 3 x hot-swappable fan modules with N+1 redundancy
- Management: CLI, NX-API, SNMP v1/v2/v3, Python scripting, OpenStack plugin, Linux Bash
- Operating system: Cisco NX-OS Software
- Low latency: Sub-microsecond port-to-port latency optimized for real-time applications

FAQs

Q: What licensing model does the Cisco Nexus 3636C-R use?
A: The N3K-C3636C-R uses the Cisco Nexus 9000 NX-OS licensing scheme. The switch includes a base license enabling Layer 2 features. Advanced Layer 3 unicast and multicast routing protocols require the purchase of a separate Layer 3 license.

Q: Can the QSFP28 ports operate at lower speeds than 100GbE?
A: Yes, each QSFP28 port can operate in native 100GbE or 40GbE mode, or be configured with breakout cables to support 4x25GbE or 4x10GbE. This flexibility provides investment protection and backward compatibility with existing 10G/25G/40G infrastructure.

Q: What deployment scenarios is the N3K-C3636C-R best suited for?
A: This switch is designed as a high-performance data center spine switch for leaf-spine fabrics. It is also well-suited for IP storage networks, DMZ deployments, big data applications requiring high throughput, edge routing, and latency-sensitive environments such as financial trading or industrial automation.

Q: Does the N3K-C3636C-R support redundancy for mission-critical deployments?
A: Yes, the switch includes dual redundant hot-swappable 2KW AC power supplies and N+1 redundant fan modules. All components are field-replaceable for maximum uptime. The platform supports features like virtual PortChannels (vPC) and VXLAN for network-level redundancy.

Q: What routing protocols are supported on this switch?
A: The N3K-C3636C-R supports comprehensive Layer 3 unicast and multicast routing protocols including BGP, OSPF, EIGRP, RIPv2, PIM-SM, SSM, and MSDP. Full routing capabilities require the Layer 3 license.

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