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Updated:August 26, 2016
High-Performance Space-Constrained Branch-Office Switching with Enterprise-Grade Features
® 4928 10 Gigabit Ethernet Switch (4928-10GE) is a wire-speed, Layer 2 to 4, 1-rack-unit (1RU) switch designed for space-constrained LAN distribution and core applications. Based on the proven Cisco Catalyst 4500 Series hardware and software architecture, this switch offers exceptional performance, bandwidth, and reliability for medium-density, multilayer aggregation of high-performance LAN access switches. High performance and scalability of intelligent network services are made possible with dedicated specialized resources known as ternary content addressable memory (TCAM). Ample TCAM resources (64,000 entries) enable high feature capacity, providing wire-speed routing and switching performance with concurrent provisioning of services such as quality of service (QoS) and security, helping ensure scalability for today's network requirements with ample room for future growth.
The Cisco Catalyst 4928 10 Gigabit Ethernet Switch offers 28 wire-speed 1000BASE-X Small Form-Factor pluggable (SFP) ports and 2 wire-speed 10 Gigabit Ethernet (X2 optics) ports. Exceptional reliability and serviceability are delivered with optional internal AC or DC 1 + 1 hot-swappable power supplies and a hot-swappable fan tray with redundant fans (Figure 1).
Figure 1. Cisco Catalyst 4928 10 Gigabit Ethernet Switch with Hot-Swappable Fan Tray and Power Supplies
The Cisco Catalyst 4928 10 Gigabit Ethernet Switch offers flexible and highly available aggregation solutions for nonstop unified network services. Enterprise-grade features such as dynamic routing, dual hot-swappable power supplies, and redundant field-replaceable fans enhance switch availability.
The switch is well-suited for space- and power-constrained deployments because of its compact 1RU form factor, economical power needs, and efficient cooling. Ideally suited to support secure converged applications such as Cisco TelePresence and Cisco Unified Communications, the switch delivers high-performance intelligent switching with its robust feature set.
Figure 2. Branch Office Network Design
The 28-port downlink density is ideally suited for branch-office locations where a collapsed distribution core is the most common network architecture (Figure 2). The downlink ports provide both an aggregation point for all access switches and connectivity and policy services for traffic flows. The uplink ports connect the LAN to the external networks, including remote data centers and branch offices. The SFP downlink ports are compatible with many different optics types, allowing network architects to mix and match to meet specific network requirements.
Key Features and Benefits
Wire-Speed Performance in All Directions
The Cisco Catalyst 4928 10 Gigabit Ethernet Switch delivers wire-speed throughput with low latency for data-intensive applications using a 96-Gbps switching fabric with a forwarding rate of 72 million packets per second (mpps) in hardware for Layer 2 to 4 traffic. High-performance switching is maintained regardless of the number of route entries or Layer 3 and 4 services enabled. Hardware-based Cisco Express Forwarding routing architecture enables increased scalability and performance. X2 10 Gigabit Ethernet optics provide 20 Gigabit Ethernet wire-speed uplinks for maximum traffic throughput.
Power-Supply Redundancy for Nonstop Operations
The Cisco Catalyst 4928 10 Gigabit Ethernet Switch provides reliability for critical applications with 1 + 1 redundant, hot-swappable internal AC or DC power supplies. The 1 + 1 power supply design provides A-to-B failover when power supplies are connected to different circuits. You can mix AC and DC power supplies in the same unit for maximum deployment flexibility. The switch also has a hot-swappable fan tray with four redundant fans for additional serviceability and availability.
The Cisco Catalyst 4928 10 Gigabit Ethernet Switch includes a single, dedicated 10/100 console port and a single, dedicated 10/100 management port for offline disaster recovery and remote out-of-band management. Remote in-band management is available with the Simple Network Management Protocol (SNMP), Telnet Client, Bootstrap Protocol (BOOTP), and Trivial File Transfer Protocol (TFTP).
The management port has two operating modes designed to increase operational efficiency and availability. When the system is in Remote Monitoring (RMON) mode, the management port operates in a disaster-recovery mode. In this state the operator can reload new Cisco IOS
® Software images from a TFTP server. During normal system operation the management port operates as a standard out-of-band management port. Network administrators can use standard command-line interface (CLI) commands to monitor and configure the switch without interrupting the data flow.
The Cisco Catalyst 4928 10 Gigabit Ethernet Switch delivers a comprehensive set of management tools to provide the visibility and control required for LAN switching. With CiscoWorks solutions and embedded CiscoWorks CiscoView, you can configure the switch to manage devices, VLANs, traffic, and policies. These web-based management tools offer numerous services, including software deployment and quick isolation of error conditions.
Table 1 lists software configuration options, Table 2 compares models for fiber aggregation, and Table 3 lists the features and benefits of the Cisco Catalyst 4929 10 Gigabit Ethernet Switch.
Table 1. Software Configuration Options for the Cisco Catalyst 4928 10 Gigabit Ethernet Switch
IP Base Image
Standard Layer 3 image, including Routing Information Protocol Version 1 (RIPv1), RIPv2, static routes, and Enhanced IGRP (EIGRP) stub
Enterprise Services Image
Enhanced Layer 3 image, including Open Shortest Path First (OSPF), Intermediate System-to-Intermediate System (IS-IS), EIGRP, Border Gateway Protocol (BGP), and all IP Base image features
Table 2. Cisco Catalyst 4900 Series Switch Model Comparison for Fiber Aggregation
Feature and Description
Cisco Catalyst 4928 10 Gigabit Ethernet Switch
Cisco Catalyst 4900M Switch
250 mpps for IPv4
125 mpps for IPv6
Modular Half-Card Slots
Maximum Number of 10 Gigabit Ethernet Ports
Maximum Number of Gigabit Ethernet (Fiber) Ports
32 (Cisco TwinGig Converter Module)
Uplink Optics Type
2 X2 (10 Gigabit Ethernet) optics
8 X2 (10 Gigabit Ethernet) optics
IP Base and Enterprise Service options
IP Base and Enterprise Service options
Synchronous Dynamic RAM (SDRAM)
28,000 (Layer 3)
16,000 (Layer 2)
56,000 for IPv4
28,000 for IPv6
Per-VLAN Spanning Tree (PVST) and VLAN IDs
Spanning Tree Protocol
Switched Virtual Interfaces (SVIs)
Security and QoS Hardware Entries
Switched Port Analyzer (SPAN)
2 ingress and 4 egress
8 ingress and 8 egress
Compact Flash Memory Support
System Reset Button
Minimum Software Requirement
Cisco IOS Software Release 12.2(46)SG or later
Cisco IOS Software Release 12.2(40)XO or later
Table 3. Features and Benefits
16-MB shared buffer
Large buffers for high-bandwidth video distribution and large file transfers
96-Gbps and 71-mpps wire-speed performance with low latency
Delay-sensitive traffic forwarding without interruption
Elimination of oversubscription bottlenecks between downlinks and uplinks across the switch
SFP optics support
Wide range of cost-effective optics types for diverse deployment options
Table 4. X2 Optics Support of Cisco Catalyst 4928 10 Gigabit Ethernet Switch
Maximum Distance over Specified Medium
Long reach (LR)
10 km on sigle-mode fiber (SMF) (G.652)
Up to 15m on IBX4 cable
300m on multimode fiber (MMF)
Short reach (SR)
26 to 300m on MMF (depends on MMF type)
Extended reach (ER)
40 km on SMF
Long reach LRM
220m on MMF
The Cisco Catalyst 4928 10 Gigabit Ethernet Switch offers a choice of 300-watt (W) AC or DC power supplies. The switch can operate with one power supply present. When two power supplies are installed, the switch shares the power load between the two supplies. Table 5 lists the specifications of the power supplies.
Table 5. AC and DC Power Supply Specifications
4A at 100V or 2A at 240V
8A at -40 to -72 VDC
8A at -40 to -60 VDC
8A at -40 to -72 VDC
25A at 12 VDC
25A at 12 VDC
• Width: 17.290 in. (43.9166 cm)
• Depth: 16.14 in. (40.9956 cm)
• Height: 1.712 in. (4.445 cm)
• Weight: 16.5 lb (7.48 kg) with one power supply
• Operating temperature: 32 to 104°F (0 to 40°C)
• Storage temperature: -40 to 167°F (-40 to 75°C)
• Relative humidity: 10 to 90 percent, noncondensing
• No performance penalty for granular QoS functions
• Per-port, per-VLAN QoS
• Match CoS for non-IPv4 traffic
• 96-Gbps switching fabric
• Layer 2 hardware forwarding at 72 mpps
• Layer 3 hardware-based IP Cisco Express Forwarding routing at 72 mpps
• Layer 4 TCP and User Datagram Protocol (UDP) hardware-based filtering at 72 mpps
• No performance penalty with advanced Layer 3 and 4 services enabled
• Software-based learning at a sustained rate of 3000 hosts per second
• Support for 55,000 unicast and 16,000 multicast MAC addresses
• Support for 32,000 entries in routing table (shared between unicast and multicast)
• Scalability to 2000 virtual ports (VLAN port instances)
• Bandwidth aggregation up to 40 Gbps using Cisco Gigabit Ethernet EtherChannel technology
• Hardware-based multicast management
• Hardware-based access control lists (ACLs), router ACLs (RACLs), and VLAN ACLs (VACLs)
• Comprehensive management
• Manageable through Cisco Network Assistant
• Single console port and single IP address to manage all system features
• Software configuration management, including local and remote storage
• Manageable through CiscoWorks Windows network-management software on a per-port and per-switch basis, providing a common management interface for Cisco routers, switches, and hubs
• SNMPv1, v2, and v3 instrumentation, delivering comprehensive in-band management
• CLI-based management console to provide detailed out-of-band management
• RMON software agent to support four RMON groups (history, statistics, alarms, and events) for enhanced traffic management, monitoring, and analysis
• Support for all nine RMON groups through the use of a Cisco SwitchProbe analyzer (SPAN) port, which permits traffic monitoring of a single port, a group of ports, or the entire switch from a single network analyzer or RMON probe
• Analysis support, including ingress port, egress port, and VLAN SPAN
• SR-3580 Network Equipment Building Standards (NEBS) level 3 (GR-63-CORE, issue 3, and GR-1089-CORE, issue 4)
• Telecommunications Carrier Group (TCG) Checklist
• ATT TP76200 level 3 and TCG Checklist
• ETS 300 019-1-1, Class 1.2 Storage
• ETS 300 019-1-2, Class 2.3 Transportation
• ETS 300 019-1-3, Class 3.2 Stationary Use
Cisco IOS Software Packaging for the Cisco Catalyst 4928 10 Gigabit Ethernet Switch
Cisco provides a Cisco IOS Software package for the Cisco Catalyst 4928 10 Gigabit Ethernet Switch, creating a foundation for features and functions and offering consistency across all Cisco Catalyst switches. The Cisco IOS Software release is designated Release 12.2SG:
• The IP Base image does not support the following routing-related features: BGP, EIGRP, OSPF, and VRF-lite).
• The IP Base image supports EIGRP stub, RIPv1 and v2, and Static Routes for Layer 3 routing on all Cisco Catalyst 4900 Series Switches.
• The Enterprise Services image supports all Cisco Catalyst 4900 Series software features based on Cisco IOS Software, including enhanced routing.
Table 1 earlier in this document provides a more detailed description of the feature differences between the IP Base and Enterprise Services images.
Cisco Catalyst 4900 series 300W AC power supply, redundant
Cisco Catalyst 4900 series 300W DC power supply
Cisco Catalyst 4900 series 300W DC power supply, redundant
Spare rack mount and cable guide
C4900 front and rear-mount brackets
GE SFP, LC connector SX transceiver
GE SFP, LC connector LX/LH transceiver
1000BASE-BX SFP, 1490NM
1000BASE-BX SFP, 1310NM
CWDM 1470 NM SFP Gigabit Ethernet and 1G/2G FC
CWDM 1490 NM SFP Gigabit Ethernet and 1G/2G FC
CWDM 1510 NM SFP Gigabit Ethernet and 1G/2G FC
CWDM 1530 NM SFP Gigabit Ethernet and 1G/2G FC
CWDM 1550 NM SFP Gigabit Ethernet and 1G/2G FC
CWDM 1570 NM SFP Gigabit Ethernet and 1G/2G FC
CWDM 1590 NM SFP Gigabit Ethernet and 1G/2G FC
CWDM 1610 NM SFP Gigabit Ethernet and 1G/2G FC
10GBASE-CX4 X2 Module
10GBASE-ER X2 Module
10GBASE-SR X2 Module
10GBASE-LX4 X2 Module
10GBASE-LR X2 Module
AS-3112 to IEC-C15 8ft Aus
BS-1363 to IEC-C15 8ft UK
BS 546 to IEC-C15 6ft South Africa, India
C13 to C14 power cord
CEI 23-16 to IEC-C15 8ft Italy
CEE 7/7 to IEC-C15 8ft Europe
IRSM 2073 to IEC-C15 8ft Argen
NEMA 6-20 to IEC-C15 US
NEMA 5-15 to IEC-C15 8ft US
Cisco Cat4900 IOS Enterprise Services W/O Crypto
Cisco Cat4900 IOS Enterprise Services SSH
Cisco Cat4900 IOS IP Base W/O Crypto
Cisco Cat4900 IOS IP Base SSH
The Cisco Catalyst 4928 has a one-year limited hardware warranty. It includes hardware replacement with a 10-day turnaround from receipt of a return materials authorization (RMA).
Cisco Technical Support Services
Cisco Technical Support Services helps ensure that your Cisco products operate efficiently, remain highly available, and benefit from current system software to help you effectively manage your network service while controlling operating costs.
Cisco Technical Support Services (Tables 8 and 9) provides significant benefits that go beyond what is offered under the Cisco warranty policy. Services available under a Cisco SMARTnet
® service contract that are not covered under a warranty include the following:
• Latest software updates
• Rapid replacement of hardware with next-day, four-hour, or two-hour dispatch options
• Ongoing technical support through Cisco Technical Assistance Center (TAC)
Software support offers maintenance and minor and major updates for licensed feature sets. Downloading new maintenance releases, patches, or updates of Cisco IOS Software helps enhance and extend the useful life of Cisco devices. Through major software updates, organizations can extend the life of equipment and maximize application technology investments by:
• Adding new functions that, in many cases, require no additional hardware investment
• Increasing the performance of current functions
• Enhancing network or application availability, reliability, and stability
Cisco TAC Support
With more than 1000 highly trained customer support engineers, 390 CCIE® experts, and access to 13,000 research and development engineers, Cisco TAC complements your in-house staff with a high level of knowledge in data, voice, and video communications networking technology. Its sophisticated call-routing system quickly routes calls to the correct technology personnel. The Cisco TAC is available 24 hours a day, 365 days a year.
This award-winning website provides 24-hour access to an extensive collection of online product and technology information, interactive network management and troubleshooting tools, and knowledge-transfer resources that can help customers reduce costs by increasing staff self-sufficiency and productivity.
Advance Hardware Replacement
Advance replacement and onsite field engineer options supply fast access to replacement hardware and field resources for installing hardware, minimizing the risk of potential network downtime.
Smart Call Home
Cisco Smart Call Home is a proactive, connected service capability of Cisco SMARTnet Service that is available at no additional cost on Cisco Catalyst 4500 Series Switches. Smart Call Home devices can continuously monitor their own health using GOLD diagnostics technology and automatically notify you of potential issues using secure transmissions. If a serious problem arises, Smart Call Home automatically detects it and generates a Cisco Technical Assistance Center (TAC) service request that is routed to the right team for a particular problem.
Table 10. Technical Support Services: Competitive Differentiators
Worldwide Virtual Lab
This extensive lab of Cisco equipment and Cisco IOS Software releases provides an invaluable engineering resource and knowledge base for training, product information, and recreation and testing of selected network problems to help decrease time to resolution.
Cisco TAC Training
• Boot camps
• Tech calls
• Tech forums
Cisco is committed to providing customers the latest in technology support. Cisco TAC training programs help customers avoid opening cases. These programs also provide knowledge transfer of Cisco networking expertise.
A powerful suite of Internet-enabled tools with firewall-friendly features, these secure, encrypted Java applets can turn a simple phone call into an interactive collaboration session, allowing customers and Cisco TAC support engineers to work together more effectively.
With 10,000 onsite field engineers and a US$2.3 billion investment in inventory, Cisco delivers award-winning, worldwide hardware replacement support from 650 depots, covering 120 countries.
Cisco IOS Software
Cisco IOS Software employs 100 discrete technologies with more than 2000 features. Each year, 400 new features are added. Cisco IOS Software is installed in more than 10 million devices and is running on more than 10,000 networks worldwide. It operates on the world's largest IPv6 and voice-over-IP (VoIP) networks and in all major service provider networks worldwide.