Cisco Nexus 3000 Series Switches

Cisco Nexus 3048 Switch Data Sheet

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Product Overview

The Cisco Nexus® 3048 Switch (Figure 1) is a line-rate Gigabit Ethernet top-of-rack (ToR) switch and is part of the Cisco Nexus 3000 Series Switches portfolio. The Cisco Nexus 3048, with its compact one-rack-unit (1RU) form factor and integrated Layer 2 and 3 switching, complements the existing Cisco Nexus family of switches. This switch runs the industry-leading Cisco® NX‑OS Software operating system, providing customers with robust features and functions that are deployed in thousands of data centers worldwide. The Cisco Nexus 3048 is ideal for big data customers that require a Gigabit Ethernet ToR switch with local switching that connects transparently to upstream Cisco Nexus switches, providing an end-to-end Cisco Nexus fabric in their data centers. This switch supports both forward and reversed airflow schemes with AC and DC power inputs.

Figure 1. Cisco Nexus 3048 Switch

Main Benefits

The Cisco Nexus 3048 provides the following main benefits:

Wire-rate Layer 2 and 3 switching

- Layer 2 and 3 switching of up to 176 Gigabit per second (Gbps) and more than 132 million packets per second (mpps) in a compact 1RU form-factor switch

Robust and purpose-built Cisco NX-OS operating system for end-to-end Cisco Nexus fabric

- Transparent integration with the Cisco Nexus family of switches to provide a consistent end-to-end Cisco Nexus fabric

- Modular operating system built for resiliency

- Integration with Cisco Data Center Network Manager (DCNM) and XML management tools

Comprehensive feature set and innovations for next-generation data centers

- Virtual PortChannel (vPC) provides Layer 2 multipathing through the elimination of Spanning Tree Protocol and enables fully utilized bisectional bandwidth and simplified Layer 2 logical topologies without the need to change the existing management and deployment models.

- Power On Auto Provisioning (POAP) enables touchless bootup and configuration of the switch, drastically reducing provisioning time.

- Cisco Embedded Event Manager (EEM) and Python scripting enable automation and remote operations in the data center.

- Advanced buffer monitoring reports real-time buffer utilization per port and per queue, which allows organizations to monitor traffic bursts and application traffic patterns.

- The 64-way equal-cost multipath (ECMP) routing enables Layer 3 fat tree designs and allows organizations to prevent network bottlenecks, increase resiliency, and add capacity with little network disruption.

- EtherAnalyzer is a built-in packet analyzer for monitoring and troubleshooting control-plane traffic and is based on the popular Wireshark open source network protocol analyzer.

- Precision Time Protocol (PTP; IEEE 1588) provides accurate clock synchronization and improved data correlation with network captures and system events.

- Full Layer 3 unicast and multicast routing protocol suites are supported, including Border Gateway Protocol (BGP), Open Shortest Path First (OSPF), Enhanced Interior Gateway Routing Protocol (EIGRP), Routing Information Protocol Version 2 (RIPv2), Protocol Independent Multicast sparse mode (PIM-SM), Source-Specific Multicast (SSM), and Multicast Source Discovery Protocol (MSDP).


48 fixed 10/100/1000-Mbps Ethernet ports

4 fixed Enhanced Small Form-Factor Pluggable (SFP+) ports

Locator LED

Dual redundant power supplies

Fan tray with redundant fans

Two 10/100/1000-Mbps management ports

One RS-232 serial console port

One USB port

Locator LED and button

Support for both forward (port-side exhaust) and reversed (port-side intake) airflow schemes is available.

Transceiver and Cabling Options

For uplink connectivity, the Cisco Nexus 3048 supports SFP+ direct-attach 10 Gigabit Ethernet copper, an innovative solution that integrates transceivers with Twinax cables into an energy-efficient and low-cost solution. For longer cable runs, multimode and single-mode optical SFP+ transceivers are supported. Table 1 lists the supported 10 Gigabit Ethernet transceiver options.

Table 1. Cisco Nexus 3048 10 Gigabit Transceiver Support Matrix

Part Number



10GBASE-SR SFP+ module (multimode fiber [MMF])


10GBASE-LR SFP+ module (single-mode fiber [SMF])


10GBASE-CU SFP+ cable 1m (Twinax cable)


10GBASE-CU SFP+ cable 3m (Twinax cable)


10GBASE-CU SFP+ cable 5m (Twinax cable)

For more information about the transceiver types, see

Cisco NX-OS Software Overview

Cisco NX-OS is a data center-class operating system built with modularity, resiliency, and serviceability at its foundation. Cisco NX-OS helps ensure continuous availability and sets the standard for mission-critical data center environments. The self-healing and highly modular design of Cisco NX-OS makes zero-impact operations a reality and enables exceptional operation flexibility.

Focused on the requirements of the data center, Cisco NX-OS provides a robust and comprehensive feature set that meets the networking requirements of present and future data centers. With an XML interface and a command-line interface (CLI) like that of Cisco IOS® Software, Cisco NX-OS provides state-of-the-art implementations of relevant networking standards as well as a variety of true data center-class Cisco innovations.

Cisco NX-OS Software Benefits

Table 2 summarizes the benefits that Cisco NX-OS offers.

Table 2. Benefits of Cisco NX-OS Software



Common software throughout the data center: Cisco NX-OS runs on all Cisco data center switch platforms: Cisco Nexus 7000, 5000, 4000, 3000, 2000, and 1000V Series.

Simplification of data center operating environment
End-to-end Cisco Nexus and Cisco NX-OS fabric
No retraining necessary for data center engineering and operations teams

Software compatibility: Cisco NX-OS interoperates with Cisco products running any variant of Cisco IOS Software and also with any networking OS that conforms to the networking standards listed as supported in this data sheet.

Transparent operation with existing network infrastructure
Open standards
No compatibility concerns

Modular software design: Cisco NX-OS is designed to support distributed multithreaded processing. Cisco NX-OS modular processes are instantiated on demand, each in a separate protected memory space. Thus, processes are started and system resources allocated only when a feature is enabled. The modular processes are governed by a real-time preemptive scheduler that helps ensure timely processing of critical functions.

Robust software
Fault tolerance
Increased scalability
Increased network availability

Troubleshooting and diagnostics: Cisco NX-OS is built with unique serviceability functions to enable network operators to take early action based on network trends and events, enhancing network planning and improving network operations center (NOC) and vendor response times. Cisco Smart Call Home and Cisco Online Health Management System (OHMS) are some of the features that enhance the serviceability of Cisco NX-OS.

Quick problem isolation and resolution
Continuous system monitoring and proactive notifications
Improved productivity of operations teams

Ease of management: Cisco NX-OS provides a programmatic XML interface based on the NETCONF industry standard. The Cisco NX-OS XML interface provides a consistent API for devices. Cisco NX-OS also supports Simple Network Management Protocol (SNMP) Versions 1, 2, and 3 MIBs.

Rapid development and creation of tools for enhanced management
Comprehensive SNMP MIB support for efficient remote monitoring

Role-based access control (RBAC): With RBAC, Cisco NX-OS enables administrators to limit access to switch operations by assigning roles to users. Administrators can customize access and restrict it to the users who require it.

Tight access control mechanism based on user roles
Improved network device security
Reduction in network problems arising from human errors

Cisco NX-OS Software Packages for Cisco Nexus 3048

The Cisco NX-OS Software package for the Cisco Nexus 3048 offers flexibility and a comprehensive feature set along with consistency with Cisco Nexus access switches. The default system software has a comprehensive Layer 2 feature set with extensive security and management features. To enable Layer 3 IP unicast and multicast routing functions, additional licenses need to be installed. Table 3 lists the software licensing details.

Table 3. Cisco NX-OS Software Package in the Cisco Nexus 3048

System default (no license required)

Comprehensive Layer 2 feature set: VLAN, IEEE 802.1Q Trunking, vPC, Link Aggregation Control Protocol (LACP), Unidirectional Link Detection (UDLD; standard and aggressive), Multiple Spanning Tree Protocol (MSTP), Rapid Spanning Tree Protocol (RSTP), Spanning Tree Protocol guards, and Transparent VLAN Trunk Protocol (VTP)
Security: Authentication, authorization, and accounting (AAA); Dynamic Host Configuration Protocol (DHCP) snooping; storm control; configurable Control-Plane Policing (CoPP); and private VLAN (PVLAN)
Management features: Cisco DCNM support, console, Secure Shell Version 2 (SSHv2) access, Cisco Discovery Protocol, SNMP, and syslog

Base license (N3K‑C3048‑BAS1K9)

Layer 3 IP routing: Inter-VLAN routing (IVR), static routes, RIPv2, access control list (ACLs), OSPFv2 (limited to 256 routes), EIGRP stub, Hot Standby Router Protocol (HSRP), Virtual Router Redundancy Protocol (VRRP), and Unicast Reverse-Path Forwarding (uRPF)
Multicast: PIM-SM, SSM, and MSDP

LAN Enterprise license (N3K-C3048-LAN1K9)*

Advanced Layer 3 IP routing: OSPFv2, EIGRP, BGP, and Virtual Route Forwarding lite (VRF-lite)
* The Base license (N3K-C3048-BAS1K9) is required to take advantage of LAN Enterprise license (N3K-C3048-LAN1K9) features. Table 5 later in this document provides a complete feature list.

Cisco Data Center Network Manager

The Cisco Nexus 3048 is supported in Cisco DCNM. Cisco DCNM is designed for hardware platforms enabled for Cisco NX-OS, which consist of the Cisco Nexus Family of products. Cisco DCNM is a Cisco management solution that increases overall data center infrastructure uptime and reliability, hence improving business continuity. Focused on the management requirements of the data center network, Cisco DCNM provides a robust framework and comprehensive feature set that meets the routing, switching, and storage administration needs of present and future data centers. In particular, Cisco DCNM automates the provisioning process, proactively monitors the LAN by detecting performance degradation, secures the network, and streamlines the diagnosis of dysfunctional network elements.

Product Specifications

Table 4 lists the specifications for the Cisco Nexus 3048, Table 5 lists software features, and Table 6 lists management standards and support.

Table 4. Specifications




1RU fixed form-factor switch
48 10/100/1000-Mbps RJ-45 ports
4 10-Gbps SFP+ uplink ports
2 redundant power supplies
1 fan tray with redundant fans
1 I/O module with management, console, and USB flash memory ports


176-Gbps switching capacity
Forwarding rate of 132 mpps
Line-rate traffic throughput (both Layer 2 and 3) on all ports
Configurable maximum transmission units (MTUs) of up to 9216 bytes (jumbo frames)

Hardware tables and scalability

MAC addresses


Number of VLANS


Spanning-tree instances

RSTP: 512
MSTP: 64

ACL entries

2000 ingress

1000 egress

Routing table

16,000 prefixes and 16,000 host entries*

8000 multicast routes*

Number of EtherChannels

52 (with vPC)

Number of ports per EtherChannel



9 MB shared

Boot flash memory

2 GB


Number of power supplies

2 (redundant)

Typical operating power

120 watts (W) (48p of 1G and 4p of 10G/SR at 100% load, with 2 power supply units [PSUs])

Maximum power



Input voltage

100 to 240 VAC

50 to 60 Hz

89 to 91% at 220V


Input voltage
Maximum current

–40 to –72 VDC


85 to 88%

Typical heat dissipation

409 BTU/hr (48p of 1G and 4p of 10G/SR at 100% load, with 2 PSUs)

Maximum heat dissipation

423 BTU/hr


Forward and reversed airflow schemes

Forward airflow: Port-side exhaust (air enters through fan-tray and power supplies and exits through ports)

Reversed airflow: Port-side intake (air enters through ports and exits through fan tray and power supplies)

Single fan tray with redundant fans

Hot swappable (must swap within 1 minute)


Measured sound power (maximum)

Fan speed: 40% duty cycle
Fan speed: 60% duty cycle
Fan speed: 100% duty cycle

63.9 dBA

64.7 dBA

66.4 dBA


Dimensions (height x width x depth)

1.72 x 17.3 x 19.7 in. (4.4 x 43.9 x 50.5 cm)


20.5 lb (9.3 kg)

Operating temperature

32 to 104°F (0 to 40°C)

Storage temperature

–40 to 158°F (–40 to 70°C)

Operating relative humidity

10 to 85% noncondensing

Up to 5 days at maximum (85%) humidity

Recommend ASHRAE data center environment

Storage relative humidity

5 to 95% noncondensing


0 to 10,000 ft (0 to 3000m)

* Please refer to Cisco Nexus 3000 Series Verified Scalability Guide for scalability numbers validated for specific software releases:

Table 5. Software Features



Layer 2

Layer 2 switch ports and VLAN trunks
IEEE 802.1Q VLAN encapsulation
Support for up to 4096 VLANs
Rapid per-VLAN Spanning Tree Plus (PVRST+) (IEEE 802.1w compatible)
MSTP (IEEE 802.1s): 64 instances
Spanning Tree PortFast
Spanning Tree Root Guard
Spanning Tree Bridge Assurance
Cisco EtherChannel technology (up to 16 ports per EtherChannel)
LACP: IEEE 802.3ad
Advanced PortChannel hashing based on Layer 2, 3, and 4 information
Jumbo frames on all ports (up to 9216 bytes)
Storm control (unicast, multicast, and broadcast)

Layer 3

Layer 3 interfaces: Routed ports on interfaces, switch virtual interfaces (SVIs), PortChannels, and subinterfaces (total = 1024)
32-way ECMP
2000 ingress and 1000 egress ACL entries
Routing protocols: Static, RIP v2, EIGRP, OSPFv2, and BGP
Bidirectional Flow Detection (BFD) for BGP
ACL: Routed ACL with Layer 3 and 4 options to match ingress and egress ACLs
VRF: VRF-lite (IP VPN), VRF-aware unicast (BGP, OSPF, and RIP), and VRF-aware multicast
uRPF with ACL; strict and loose modes
Jumbo frame support (up to 9216 bytes)


Multicast: PIM-SM Version 2 and SSM

Bootstrap router (BSR), Automatic Rendezvous Point (Auto-RP), and Static RP

MSDP and Anycast-RP

Internet Group Management Protocol (IGMP) Versions 2, and 3

Quality of service (QoS)

Layer 2 IEEE 802.1p (class of service [CoS])

8 hardware queues per port

Per-port QoS configuration

CoS trust

Port-based CoS assignment

Modular QoS CLI (MQC) compliance

ACL-based QoS classification (Layers 2, 3, and 4)

MQC CoS marking

Differentiated services code point (DSCP) marking

Weighted Random Early Detection (WRED)

CoS-based egress queuing

Egress strict-priority queuing

Egress port-based scheduling: Weighted Round-Robin (WRR)

Explicit Congestion Notification (ECN)


Ingress ACLs (standard and extended) on Ethernet
Standard and extended Layer 3 to 4 ACLs: IPv4, Internet Control Message Protocol (ICMP), TCP, User Datagram Protocol (UDP), etc.
VLAN-based ACLs (VACLs)
Port-based ACLs (PACLs)
Named ACLs
ACLs on virtual terminals (vtys)
DHCP snooping with Option 82
Port number in DHCP Option 82
DHCP relay
Dynamic Address Resolution Protocol (ARP) inspection


Switch management using 10/100/1000-Mbps management or console ports
CLI-based console to provide detailed out-of-band management
In-band switch management
Locator and beacon LEDs
Port-based locator and beacon LEDs
Configuration rollback
Syslog generation on system resources (for example, FIB tables)
Embedded packet analyzer
SNMP v1, v2, and v3
Enhanced SNMP MIB support
XML (NETCONF) support
Remote monitoring (RMON)
Advanced Encryption Standard (AES) for management traffic
Unified username and passwords across CLI and SNMP
Microsoft Challenge Handshake Authentication Protocol (MS-CHAP)
Digital certificates for management between switch and RADIUS server
Cisco Discovery Protocol Versions 1 and 2
Cisco Switched Port Analyzer (SPAN) on physical, PortChannel and VLAN interfaces
Encapsulated Remote Switched Port Analyzer (ERSPAN)
Ingress and egress packet counters per interface
PTP (IEEE1588) boundary clock
Network Time Protocol (NTP)
Cisco OHMS
Comprehensive bootup diagnostic tests
Cisco Call Home
Cisco DCNM
Advanced buffer monitoring

Table 6. Management and Standards Support



MIB support

Generic MIBs


Ethernet MIBs


Configuration MIBs


Monitoring MIBs


Security MIBs


Miscellaneous MIBs


Layer 3 and Routing MIBs



IEEE 802.1D: Spanning Tree Protocol
IEEE 802.1p: CoS Prioritization
IEEE 802.1Q: VLAN Tagging
IEEE 802.1s: Multiple VLAN Instances of Spanning Tree Protocol
IEEE 802.1w: Rapid Reconfiguration of Spanning Tree Protocol
IEEE 802.3z: Gigabit Ethernet
IEEE 802.3ad: Link Aggregation Control Protocol (LACP)
IEEE 802.3ae: 10 Gigabit Ethernet
IEEE 802.1ab: LLDP
IEEE 1588-2008: Precision Time Protocol (Boundary Clock)



RFC 1997: BGP Communities Attribute
RFC 2385: Protection of BGP Sessions with the TCP MD5 Signature Option
RFC 2439: BGP Route Flap Damping
RFC 2519: A Framework for Inter-Domain Route Aggregation
RFC 2545: Use of BGPv4 Multiprotocol Extensions
RFC 2858: Multiprotocol Extensions for BGPv4
RFC 3065: Autonomous System Confederations for BGP
RFC 3392: Capabilities Advertisement with BGPv4
RFC 4271: BGPv4
RFC 4273: BGPv4 MIB: Definitions of Managed Objects for BGPv4
RFC 4456: BGP Route Reflection
RFC 4486: Subcodes for BGP Cease Notification Message
RFC 4724: Graceful Restart Mechanism for BGP
RFC 4893: BGP Support for Four-Octet AS Number Space


RFC 2328: OSPF Version 2
8431RFC 3101: OSPF Not-So-Stubby-Area (NSSA) Option
RFC 3137: OSPF Stub Router Advertisement
RFC 3509: Alternative Implementations of OSPF Area Border Routers
RFC 3623: Graceful OSPF Restart
RFC 4750: OSPF Version 2 MIB


RFC 1724: RIPv2 MIB Extension
RFC 2082: RIPv2 MD5 Authentication
RFC 2453: RIP Version 2
IP Services
RFC 768: User Datagram Protocol (UDP)
RFC 783: Trivial File Transfer Protocol (TFTP)
RFC 791: IP
RFC 792: Internet Control Message Protocol (ICMP)
RFC 793: TCP
RFC 826: ARP
RFC 854: Telnet
RFC 959: FTP
RFC 1027: Proxy ARP
RFC 1305: Network Time Protocol (NTP) Version 3
RFC 1519: Classless Interdomain Routing (CIDR)
RFC 1542: BootP Relay
RFC 1591: Domain Name System (DNS) Client
RFC 1812: IPv4 Routers
RFC 2131: DHCP Helper
RFC 2338: VRRP

IP Multicast

RFC 2236: Internet Group Management Protocol, version 2
RFC 3376: Internet Group Management Protocol, Version 3
RFC 3446: Anycast Rendezvous Point Mechanism Using PIM and MSDP
RFC 3569: An Overview of SSM
RFC 3618: Multicast Source Discovery Protocol (MSDP)
RFC 4601: Protocol Independent Multicast - Sparse Mode (PIM-SM): Protocol Specification (Revised)
RFC 4607: Source-Specific Multicast for IP
RFC 4610: Anycast-RP using PIM
RFC 5132: IP Multicast MIB

Software Requirements

Cisco Nexus 3000 Series Switches are supported by Cisco NX-OS Software Release 5.0 and later. Cisco NX-OS interoperates with any networking OS, including Cisco IOS Software, that conforms to the networking standards mentioned in this data sheet.

Regulatory Standards Compliance

Table 7 summarizes regulatory standards compliance for the Cisco Nexus 3000 Series.

Table 7. Regulatory Standards Compliance: Safety and EMC



Regulatory compliance

Products should comply with CE Markings per directives 2004/108/EC and 2006/95/EC


UL 60950-1 Second Edition
CAN/CSA-C22.2 No. 60950-1 Second Edition
EN 60950-1 Second Edition
IEC 60950-1 Second Edition
AS/NZS 60950-1

EMC: Emissions

47CFR Part 15 (CFR 47) Class A
CISPR22 Class A
EN55022 Class A
ICES003 Class A
VCCI Class A
KN22 Class A
CNS13438 Class A

EMC: Immunity



The product is RoHS 5 compliant with exception for lead press-fit connectors

Ordering Information

Table 8 provides ordering information for the Cisco Nexus 3048.

Table 8. Ordering Information

Part Number




Nexus 3048TP-1GE 1RU 48 10/100/1000 Mbps and 4 10Gbps ports


Nexus 3048 Fan Module, Forward airflow (port side exhaust)


Nexus 3048 Fan Module, Reversed airflow (port side intake)


N2K/3K 400W AC Power Supply, Forward airflow (port side exhaust)


N2K/3K 400W AC Power Supply, Reversed airflow (port side intake)


N2K/3K 400W DC Power Supply, Forward airflow (port side exhaust)


N3K Series 350W DC Power Supply, Reversed airflow (port side intake)

Software Licenses


Nexus 3048 Layer 3 Base License


Nexus 3048 Layer 3 LAN Enterprise License (Requires N3K-C3048-BAS1K9 License)



Nexus 3048 Fan Module, Forward airflow (port side exhaust), Spare


Nexus 3048 Fan Module, Reversed airflow (port side intake), Spare


N2K/3K 400W AC Power Supply, Std airflow (port side exhaust), Spare


N2K/3K 400W AC Power Supply, Reversed airflow (port side intake), Spare


N2K/3K 400W DC Power Supply, Forward airflow (port side exhaust), Spare


N3K Series 350W DC Power Supply, Reversed airflow (port side intake), Spare


Nexus 3000 Accessory Kit



Nexus 3048, Forward Airflow (port side exhaust), AC P/S, Base & LAN Ent Lic Bundle


Nexus 3048, Reversed Airflow (port side intake), AC P/S, Base & LAN Ent Lic Bundle


Nexus 3048, Forward Airflow (port side exhaust), DC P/S, Base & LAN Ent Lic Bundle


Nexus 3048, Reversed Airflow (port side intake), DC P/S, Base & LAN Ent Lic Bundle

Cables and Optics


10GBASE-SR SFP+ Module


10GBASE-LR SFP+ Module


10GBASE-CU SFP+ Cable 1 Meter


10GBASE-CU SFP+ Cable 3 Meter


10GBASE-CU SFP+ Cable 5 Meter

Service and Support

Cisco offers a wide range of services to help accelerate your success in deploying and optimizing the Cisco Nexus 3000 Series in your data center. The innovative Cisco Services offerings are delivered through a unique combination of people, processes, tools, and partners and are focused on helping you increase operation efficiency and improve your data center network. Cisco Advanced Services uses an architecture-led approach to help you align your data center infrastructure with your business goals and achieve long-term value. Cisco SMARTnet® Service helps you resolve mission-critical problems with direct access at any time to Cisco network experts and award-winning resources. With this service, you can take advantage of the Cisco Smart Call Home service capability, which offers proactive diagnostics and real-time alerts on your Cisco Nexus 3000 Series Switches. Spanning the entire network lifecycle, Cisco Services helps increase investment protection, optimize network operations, support migration operations, and strengthen your IT expertise.

For More Information

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