Data Sheet
Cisco Nexus 3048 Switch
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.
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.
32-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 (IEEE 1588) provides accurate clock synchronization and Improved data
correlation with network captures and system events.
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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 100/1000 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 management ports
One RS-232 serial console port
One USB port
Locator LED and button
Support for both standard (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)
Active Twinax cable assembly, 7m
Active Twinax cable assembly, 10m
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 operational flexibility.
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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 that 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
● 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
● 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
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
● 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
● Improved network device security
● Increased scalability
● Increased network availability
● Reduction in network problems arising from
human error
Cisco NX-OX Software Package for Cisco Nexus 3048
The Cisco NX-OS Software package in 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
● Comprehensive Layer 2 feature set: VLAN, IEEE 802.1Q Trunking, Link Aggregation Control Protocol (LACP),
UDLD (Std. 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, and private VLAN (PVLAN)
● Management features: Cisco DCNM support, console, Secure Shell Version 2 (SSHv2) access, Cisco Discovery
Protocol, SNMP, and syslog
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Base license
● 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
● 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 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.
● 1RU fixed form-factor switch
● 48 100/1000 Mbps RJ-45 ports
● 4 1/10 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
MAC addresses
Number of VLANS
Spanning-tree instances
ACL entries
● RSTP: 512
● MSTP: 64
2000 ingress
1000 egress
Routing table
16,000 prefixes and 16,000 host entries
8000 multicast routes
Number of EtherChannels
64 (with vPC)
Number of ports per EtherChannel
9 MB shared
Boot flash memory
2 GB
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Number of power supplies
2 (redundant)
Typical operating power
143 watts (W) (48p of 1G and 4p of 10G at 100% load,
with 2 power supply units [PSUs])
Maximum power
Input voltage
100 to 240 VAC
50 to 60 Hz
Power supply efficiency
89 to 91% at 220V
Typical heat dissipation
488 BTU/hr (48p of 1G and 4p of 10G at 100% load, with
2 PSUs)
Maximum heat dissipation
911 BTU/hr (267W)
Standard and reversed airflow schemes
Standard 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)
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 configuration limits documentation for exact scalability numbers validated for specific
software releases.
Table 5.
Layer 2
Software Features
● 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
● vPC
● 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)
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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
● 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
● ACL logging and statistics
● ACLs on vtys
● DHCP snooping with Option 82
● DHCP relay
● Dynamic Address Resolution Protocol (ARP) inspection
● Control Plane Policing (CoPP)
● 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
● SSHv2
● Telnet
● AAA with RBAC
● Syslog
● Embedded packet analyzer
● SNMP v1, v2, and v3
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● 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, VLAN, and Fibre Channel interfaces
● Ingress and egress packet counters per interface
● Precision Time Protocol (PTP) Boundary clock
● Network Time Protocol (NTP)
● Cisco OHMS
● Comprehensive bootup diagnostic tests
● Call Home
● Cisco Smart Call Home
● Cisco DCNM
Table 6.
Management and Standards Support
MIB support
Generic MIBs
Monitoring MIBs
● IANAifType-MIB
● IANAiprouteprotocol-MIB
Ethernet MIBs
Configuration MIBs
Security MIBs
Miscellaneous MIBs
Layer 3 and Routing MIBs
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● 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
● 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
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● 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
● GB4943
● 47CFR Part 15 (CFR 47) Class A
● AS/NZS CISPR22 Class A
EMC: Emissions
● CISPR22 Class A
● EN55022 Class A
● ICES003 Class A
● VCCI Class A
● EN61000-3-2
● EN61000-3-3
● KN22 Class A
● CNS13438 Class A
● EN55024
EMC: Immunity
● EN300386
● KN24
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 1GE and 4 10GE ports
Nexus 3048 Fan Module, Standard airflow (port side exhaust)
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Part Number
Nexus 3048 Fan Module, Reversed airflow (port side intake)
N2K/3K 400W AC Power Supply, Std airflow (port side exhaust)
N2K/3K 400W AC Power Supply, Reversed airflow (port side intake)
Software Licenses
Nexus 3048 Layer 3 Base License
Nexus 3048 Layer 3 LAN Enterprise License
Nexus 3048 Fan Module, Standard 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)
N2K/3K 400W AC Power Supply, Reversed airflow (port side intake)
Nexus 3000 Accessory Kit
Nexus 3048, Std Airflow (port side exhaust), AC P/S, LAN Ent Lic Bundle
Nexus 3048, Reversed Airflow (port side intake), AC P/S, 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
Active Twinax cable assembly, 7m
Active Twinax cable assembly, 10m
GE SFP, LC connector SX transceiver
GE SFP, LC connector LX/LH transceiver
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 operational
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
For more information, please visit
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