The Cisco® Catalyst® 3750 Series Switches (Figures 1 through 4) are innovative switches that improve
LAN operating efficiency by combining industry-leading ease of use and high resiliency for stackable switches.
This product series features Cisco StackWise™ technology, a 32-Gbps stack interconnect that allows customers
to build a unified, highly resilient switching system, one switch at a time.
Figure 1. Cisco Catalyst 3750 Series Switches for 10/100 and 10/100/1000 Access and Aggregation
Figure 2. Cisco Catalyst 3750-24PS and Cisco Catalyst 3750-48PS Switches with IEEE 802.3af Power
Figure 3. Cisco Catalyst 3750G-16TD Switch
Figure 4. Cisco Catalyst 3750G-48TS Switch, Cisco Catalyst 3750G-48PS Switch with IEEE 802.3af Power,
Cisco Catalyst 3750G-24TS-1U Switch, and Cisco Catalyst 3750G-24PS Switch with IEEE 802.3af Power
For midsized organizations and enterprise branch offices, the Cisco Catalyst 3750 Series eases deployment of converged applications
and adapts to changing business needs by providing configuration flexibility, support for converged network patterns, and automation
of intelligent network services configurations. In addition, the Cisco Catalyst 3750 Series is optimized for high-density Gigabit Ethernet
deployments and includes a diverse range of switches that meet access,
aggregation, or small-network backbone-connectivity requirements.
The Cisco Catalyst 3750 Series includes the following configurations:
• Cisco Catalyst 3750G-24TS-24 Ethernet 10/100/1000 ports and four Small Form-Factor Pluggable (SFP) uplinks
• Cisco Catalyst 3750G-24T-24 Ethernet 10/100/1000 ports
• Cisco Catalyst 3750G-12S-12 Gigabit Ethernet SFP ports
• Cisco Catalyst 3750-48TS-48 Ethernet 10/100 ports and four SFP uplinks
• Cisco Catalyst 3750-24TS-24 Ethernet 10/100 ports and two SFP uplinks
• Cisco Catalyst 3750-48PS-48 Ethernet 10/100 ports with IEEE 802.3af and Cisco prestandard Power over
Ethernet (PoE) and four SFP uplinks
• Cisco Catalyst 3750-24PS-24 Ethernet 10/100 ports with IEEE 802.3af and Cisco prestandard PoE and two SFP uplinks
• Cisco Catalyst 3750-24FS-24 100BASE-FX Ethernet ports and two SFP uplinks
• Cisco Catalyst 3750G-24TS-1U-24 Ethernet 10/100/1000 ports and four SFP uplinks, 1-rack unit (RU) height
• Cisco Catalyst 3750G-24PS-24 Ethernet 10/100/1000 ports with IEEE 802.3af and Cisco prestandard
PoE and four SFP uplinks
• Cisco Catalyst 3750G-48TS-48 Ethernet 10/100/1000 ports and four SFP uplinks
• Cisco Catalyst 3750G-48PS-48 Ethernet 10/100/1000 ports with IEEE 802.3af and Cisco prestandard
PoE and four SFP uplinks
• Cisco Catalyst 3750G-24WS-24 Ethernet 10/100/1000 ports with IEEE 802.3af, Cisco prestandard PoE
and two SFP uplinks and an integrated wireless LAN controller
The Cisco Catalyst 3750 Series is available with either the IP Base image or the IP Services image. The IP Base image feature set includes
advanced quality of service (QoS), rate-limiting, access control lists (ACLs), static routing, Routing Information Protocol (RIP) and EIGRP
stub routing, capabilities. The IP Services image provides a richer set of enterprise-class features, including advanced hardware-based
IPv6 and multicast routing.
Cisco StackWise Technology offers Stackable Resiliency
Cisco StackWise technology is a stacking architecture optimized for Gigabit Ethernet. This technology is designed to respond to additions,
deletions, and redeployment while maintaining constant performance. Cisco StackWise technology unites up to nine individual switches
into a single logical unit, using special stack-interconnect cables and stacking software. The individual switches can be any combination
of Cisco Catalyst 3750 and Cisco Catalyst 3750-E Series Switches. The stack behaves as a single switching unit that is managed by a master
switch, elected from one of the member switches. The master switch automatically creates and updates all the switching and optional routing
tables. A working stack can accept new members or delete old ones without service interruption.
Cisco EnergyWise Technology
Cisco EnergyWise is an innovative architecture, added to the Cisco Catalyst 3750 switches, promoting companywide sustainability by reducing
energy consumption across an entire corporate infrastructure and affecting more than 50 percent of global greenhouse gas emissions created
by worldwide building infrastructure, a much greater effect than the 2 percent generated by the IT industry. Cisco EnergyWise enables companies
to measure the power consumption of network infrastructure and network-attached devices and manage power consumption with specific
policies, reducing power consumption to realize increased cost savings, potentially affecting any powered device.
EnergyWise encompasses a highly intelligent network-based approach to communicate messages that measure and control energy between
network devices and endpoints. The network discovers Cisco EnergyWise manageable devices, monitors their power consumption,
and takes action based on business rules to reduce power consumption. EnergyWise uses a unique domain-naming system to query
and summarize information from large sets of devices, making it simpler than traditional network management capabilities. Cisco EnergyWise's
management interfaces allow facilities and network management applications to communicate with endpoints and each other using the network
as a unifying fabric. The management interface uses standard SNMP or SSL to integrate Cisco and third-party management systems.
Cisco EnergyWise extends the network as a platform for the power control plane for gathering, managing, and reducing power consumption of
resulting in companywide optimized power delivery and reduced energy costs.
Primary Features and Benefits
Ease of Use: "Plug-and-Play" Configuration
A working stack is self-managing and self-configuring. When switches are added or removed, the master switch automatically loads
the Cisco IOS® Software revision running on the stack to the new switch, loads the global configuration parameters, and updates all the routing
tables to reflect changes. Upgrades are applied universally and simultaneously to all members of the stack.
The Cisco Catalyst 3750 Series stacks up to nine switches as a single logical unit for a total of 468 Ethernet or PoE 10/100 ports, or
468 Ethernet 10/100/1000 ports or PoE 10/100/1000 ports, or nine 10 Gigabit Ethernet ports. Additional port combinations can be created by
connecting the Cisco Catalyst 3750-E Series Switches to the stack. Individual 10/100, 10/100/1000, and 10 Gigabit Ethernet units can be joined
in any combination to evolve with network needs.
Return on Investment Through Lower Operations Costs
The automatic Cisco IOS Software version checking and loading of the global configuration parameters provide the first level of operational
time saving. The second level is added during the event of an outage. When you remove a troubled switch from an existing stack of switches
and replace it with another switch, the master switch will recognize this as a maintenance outage and automatically reload the port-level
configuration that was on the previous switch without user intervention. This allows IT managers to have local personnel in remote locations
perform maintenance tasks instead of sending costly technicians out for a few minutes of work, thus saving thousands of dollars
in operational costs.
Mix-and-Match Switch Types: Pay as You Expand Your Network
Stacks can be created with any combination of Cisco Catalyst 3750 and Cisco Catalyst 3750-E switches. Customers who need a mixture
of 10/100 and 10/100/1000 ports, PoE, and wiring-closet aggregation capability can incrementally develop the access environment, paying
only for what they need. When uplink capacity needs to be increased, you can easily upgrade your bandwidth by adding a 10 Gigabit Ethernet
version to the stack and upgrade your Gigabit Ethernet links with 10 Gigabit Ethernet on the existing fiber.
Integrated Wireless LAN Controller
The Cisco Catalyst 3750G Integrated Wireless LAN Controller integrates wireless LAN controller functions into the Cisco Catalyst 3750G
Series Switches and delivers improved operating efficiency and WLAN security, mobility, and ease of use for business-critical wireless LANs.
The Cisco Catalyst 3750G Integrated Wireless LAN Controller delivers centralized security policies, wireless intrusion prevention system
(IPS) capabilities, award-winning RF management, QoS, and Layer 3 fast secure roaming for WLANs. As a core component of the
Cisco Unified Wireless Network, the Cisco Catalyst 3750G Integrated Wireless LAN Controller provides the control, security, redundancy,
and reliability that network managers need to scale and manage their wireless networks as easily as they scale and manage
their traditional wired networks.
Availability: Uninterrupted Performance at Layer 2 and Layer 3
The Cisco Catalyst 3750 Series increases availability for stackable switches. Each switch can operate as both a master controller
and a forwarding processor. Each switch in the stack can serve as a master, creating a 1:N availability scheme for network control.
In the unlikely event of a single unit failure, all other units continue to forward traffic and maintain operation.
Smart Multicast: A New Level of Efficiency for Converged Networks
With Cisco StackWise technology, the Cisco Catalyst 3750 Series offers greater efficiency for multicast applications such as video
. Each data packet is put onto the backplane only once, which provides more effective support for more data streams.
Superior Quality of Service Across the Stack and at Wire Speed
The Cisco Catalyst 3750-E and 3750 Series offer Gigabit and 10 Gigabit Ethernet speed with intelligent services that keep everything
flowing smoothly, even at 10 times the normal network speed. Mechanisms for marking, classification, and scheduling deliver
best-in-class performance for data, voice, and video traffic, all at wire speed.
Network Security: Granular Control for the Access Environment
The Cisco Catalyst 3750 Series supports a comprehensive set of security features for connectivity and access control, including
ACLs, authentication, port-level security, and identity-based network services with 802.1x and extensions. This set of comprehensive
features not only helps prevent external attacks, but also defends the network against "man-in-the-middle" attacks, a primary concern
in today's business environment.
Single IP Management: Many Switches, One Address
Each Cisco Catalyst 3750 Series stack is managed as a single object and has a single IP address. Single IP management is supported
for activities such as fault detection, VLAN creation and modification, network security, and QoS controls.
Jumbo Frames: Support for High-Demand Applications
The Cisco Catalyst 3750 Series supports jumbo frames on the 10/100/1000 configurations for advanced data and video applications
requiring very large frames. All Cisco Catalyst 3750-E Series switch models also support jumbo frames.
The Cisco Catalyst 3750 Series supports IPv6 routing in hardware for maximum performance. As network devices grow and the
need for larger addressing and higher security becomes critical, the Cisco Catalyst 3750 Series will be ready to meet the requirement.
Standard PoE Support: Graceful Addition of IP Communications
The Cisco Catalyst 3750 and 3750G PoE models support Cisco IP phones and Cisco Aironet® wireless LAN (WLAN) access points,
as well as any IEEE 802.3af-compliant end device. The Cisco Catalyst 3750 and 3750G 24-port versions can support 24 simultaneous
full-powered PoE ports at 15.4W for maximum powered device support. The 48-port versions can deliver the necessary power to support
24 ports at 15.4W, 48 ports at 7.7W, or any combination in between.
10 Gigabit Ethernet Support: Increased Uplink Bandwidth for Gigabit Ethernet Deployments
The Cisco Catalyst 3750 Series allows network managers to incrementally add IEEE 802.3ae-compliant 10 Gigabit Ethernet connectivity
in their wiring closets or grid clusters, further facilitating and enhancing Gigabit Ethernet networks. This provides investment protection to
customers who want to use their existing fiber plant, add uplink bandwidth capacity to their switching stacks, and provide higher
performance to applications and users. The Cisco Catalyst 3750-E Series offers an even greater variety of 10 Gigabit Ethernet port
The Cisco Catalyst 3750 Series (Figure 5) offers both a superior command-line interface (CLI) for detailed configuration
and Cisco Network Assistant Software, a Web-based tool for quick configuration based on preset templates. In addition,
CiscoWorks supports the Cisco Catalyst 3750 Series for networkwide management. Table 1 lists the features and benefits of the Cisco
Catalyst 3750 Series.
Figure 5. Cisco Catalyst 3750 Series Switches
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