Cisco Nexus 56128P

The Cisco Nexus 56128P is designed to deliver high-density top-of-rack (ToR) Layer 2 and Layer 3, 10 Gigabit Ethernet with unified ports in compact one and two-rack-unit form factors.

  • Up to 96 10GE ports (of which 48 are UP) and 8 true 40GE QSFP ports.
  • Hardware based VXLAN (L2, L3, Gateway) and NVGRE capable
  • Up to 1152 ports in a single management domain via Cisco FEX architecture

The Cisco Nexus 5000 Series includes Cisco Nexus 5500 and 5600 platforms as part of the Cisco Unified Fabric portfolio.

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Cisco Nexus 56128P Features


  • Cisco Nexus 5672UP: Layer 2 and 3 hardware forwarding at 1.44 Tbps, 1071 Mpps (64 byte packets)
  • Cisco Nexus 56128P: Layer 2 and 3 hardware forwarding at 2.56 Tbps, 1904 Mpps (64 byte packets)
  • Support for up to 256,000 combined entries of MAC addresses and ARP entries
  • Low-latency of approximately 1 microsecond using cut-through forwarding for predictable, consistent traffic latency regardless of packet size, traffic pattern, or features enabled on 40 and 10 Gigabit Ethernet interfaces
  • 25-MB buffer per 12x 10 Gigabit Ethernet SFP+ interfaces
  • Line-rate traffic throughput on all ports in layer 2 and layer 3 mode

High Scalability and Performance

  • The Cisco 56128P switch is designed to meet the scaling demands of traditional and cloud deployments
  • Up to 96 10GE ports (of which 48 are UP) and 8 true 40GE QSFP ports.
  • Hardware based VXLAN (L2, L3, Gateway) and NVGRE capable
  • Up to 1152 ports in a single management domain via Cisco FEX architecture
  • Large table sizes and buffers with 1 us latency

Operational Efficiency

  • The Cisco 56128P switch delivers ease of operations via single point of management and programmability:
  • Advanced analytics tool kit with latency and buffer monitoring
  • Single point of management with Cisco FEX Architecture
  • Programmability - Python scripting, TCL scripting, the Cisco One Platform Kit, OnePK and Openflow.

Architectural Flexibility

  • The Cisco 56128P switch provides deployment flexibility for varying customer needs:
  • LAN/SAN Convergence
  • Supports Dynamic Fabric Automation (DFA) for simplified virtualized and cloud deployments
  • FabricPath support for scalable layer 2 networks


ARP support, Access Control List (ACL) support, Bidirectional Forwarding Detection (BFD), Broadcast Storm Control, Call Home function support, Class of Service (CoS), DHCP support, Data Center Bridging Exchange (DCBX) support, Dynamic ARP Inspection (DAI), Equal-Cost Multipath (ECMP), FCoE forwarding, Hot Standby Router Protocol (HSRP) support, IPv4 support, IPv6 support, Jumbo Frames support, Link Aggregation Control Protocol (LACP), Management Information Base (MIB), Multicast Source Discovery Protocol (MSDP), Multicast Storm Control, Multicast VLAN Registration (MVR), Multiple Spanning Tree Protocol (MSTP) support, Per-VLAN Rapid Spanning Tree (PVRST), Quality of Service (QoS), Registered State Change Notification (RSCN) support, STP PortFast, RADIUS support, STP Root Guard, SNMP support, Syslog support, SSH support, Transparent (N_Port ID Virtualization - NPIV) mode support, Unicast Reverse Path Forwarding (URPF), Unicast Storm Control, VLAN support, VPN support, Virtual PortChannel (vPC) technology, Virtual Routing and Forwarding (VRF), Weighted Round Robin (WRR) queuing, redundant hot swappable fans, Virtual Route Redundancy Protocol (VRRP) support, layer 3 switching, port air intake, port exhaust, routing, static routing

Cisco Nexus 56128P Technical Specifications

Feature Specification
Subtype 10 Gigabit Ethernet
Ports 48 x 1 Gigabit / 10 Gigabit SFP+ + 4 x 40Gb Ethernet / FCoE QSFP+ (breakout compatible)
  • ARP entries: 256000
  • Virtual interfaces (VLANs): 4096
  • ACL entries: 4000
  • Multiple Spanning Tree Protocol instances: 64
  • Host table entries (IPv4): 32000
  • Host table entries (IPv6): 8000
  • Multicast entries (IPv4): 8000
  • IGMP snooping entries: 8000
  • Virtual Routing and Forwarding (VRF) entries: 4000
  • Equal-Cost Multipathing (ECMP) ways: 64
Jumbo Frame Support 9216 bytes
Performance Forwarding performance: 2.56 Tbps
Authentication Method MS-CHAP, RADIUS, Secure Shell (SSH), TACACS+
MAC Address Table Size 256K entries
Authentication Method Secure Shell (SSH), RADIUS, TACACS+, MS-CHAP
Status Indicators Port status
Encryption Algorithm AES
Routing Protocol IS-IS, RIP-2, BGP, EIGRP, HSRP, IGMP, VRRP, OSPFv2, PIM-SM, EIGRP for IPv6, OSPF for IPv6, static IPv4 routing, static IPv6 routing, ECMP, policy-based routing (PBR), Bidirectional Forwarding Detection (BFD), BGP for IPv6
Manufacturer Cisco

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