| Feature | Benefit |
Ease of
Use and Deployment | Autoconfiguration of new stack units eliminates reconfiguration.
Dynamic Host Configuration Protocol (DHCP) autoconfiguration of multiple switches through a boot server eases switch deployment.
Automatic Cisco IOS Software version checking and updating help ensure that all stack members have the same software version.
Automatic QoS (AutoQoS) simplifies QoS configuration in voice over IP (VoIP) networks by issuing interface and global switch commands to detect Cisco IP phones, classify traffic, and help enable egress queue configuration.
Master configuration management helps ensure that all switches are automatically upgraded when the master switch receives a new software version.
Autosensing on each non-SFP port detects the speed of the attached device and automatically configures the port for 10-, 100-, or 1000-Mbps operation, easing switch deployment in mixed 10, 100, and 1000BASE-T environments.
Autonegotiating on all ports automatically selects half- or full-duplex transmission mode to optimize bandwidth.
Dynamic Trunking Protocol (DTP) facilitates dynamic trunk configuration across all switch ports.
Port Aggregation Protocol (PAgP) automates the creation of Cisco Fast EtherChannel ® groups or Gigabit EtherChannel groups to link to another switch, router, or server.
Link Aggregation Control Protocol (LACP) allows the creation of Ethernet channeling with devices that conform to IEEE 802.3ad. This feature is similar to Cisco EtherChannel technology and PAgP.
DHCP Relay allows a DHCP relay agent to broadcast DHCP requests to the network DHCP server.
IEEE 802.3z-compliant 1000BASE-SX, 1000BASE-LX/LH, 1000BASE-ZX, 1000BASE-T, and CWDM physical-interface support through a field-replaceable SFP module provides unprecedented flexibility in switch deployment.
There is a default configuration to help ensure that the switch can be quickly connected to the network and can pass traffic with minimal user intervention. This default configuration exists even if there is no configuration stored in Flash memory.
Automatic media-dependent interface crossover (MDIX) automatically adjusts transmit and receive pairs if an incorrect cable type (crossover or straight-through) is installed. |
| Cisco EnergyWise | Cisco EnergyWise for greenhouse gas emissions and operational cost optimization by measuring, reporting, and reducing energy consumption across the entire corporate infrastructure, well beyond the scope of IT. |
| Availability and Scalability |
| Superior Redundancy for Fault Backup | 1:N master redundancy allows each stack member to serve as a master, providing the highest reliability for forwarding.
Cisco CrossStack UplinkFast (CSUF) technology provides increased redundancy and network resiliency through fast spanning-tree convergence (less than 2 seconds) across a switch stack with Cisco StackWise technology.
Cross-Stack EtherChannel provides the ability to configure Cisco EtherChannel technology across different members of the stack for high resiliency.
IEEE 802.1w Rapid Spanning Tree Protocol (RSTP) provides rapid spanning-tree convergence independent of spanning-tree timers and also offers the benefit of distributed processing.
Stacked units behave as a single spanning-tree node.
Per-VLAN Rapid Spanning Tree (PVRST+) allows rapid spanning-tree reconvergence on a per-VLAN spanning-tree basis, without requiring the implementation of spanning-tree instances.
Cisco Hot Standby Router Protocol (HSRP) is supported to create redundant, failsafe routing topologies.
Unidirectional Link Detection Protocol (UDLD) and Aggressive UDLD allow unidirectional links caused by incorrect fiber-optic wiring or port faults to be detected and disabled on fiber-optic interfaces.
Switch-port autorecovery (errdisable) automatically attempts to reactivate a link that is disabled because of a network error.
Cisco RPS 2300 and RPS 675 Redundant Power Systems support provides superior power-source redundancy for up to 6 Cisco networking devices, resulting in improved fault tolerance and network uptime.
Equal-cost routing for load balancing and redundancy.
Bandwidth aggregation up to 16 Gbps through 10 Gigabit EtherChannel technology, 8 Gbps through Gigabit EtherChannel technology, and up to 800 Mbps through Fast EtherChannel technology enhances fault tolerance and offers higher-speed aggregated bandwidth between switches and to routers and individual servers.
Uplink bandwidth can be easily upgraded by adding a 10 Gigabit Ethernet version to a wiring-closet stack and replacing the Gigabit Ethernet uplinks with 10 Gigabit Ethernet without having to change fiber pairs. |
| High-Performance IP Routing | Cisco Express Forwarding hardware routing architecture delivers extremely high-performance IP routing.
Basic IP unicast routing protocols (static, Routing Information Protocol Version 1 [RIPv1], RIPv2 and RIPng) are supported for small-network routing applications.
IPv6 routing (OSPFv6 and EIGRPv6) support in hardware for maximum performance. The IP Services License is required.
Advanced IP unicast routing protocols (Open Shortest Path First [OSPF], Interior Gateway Routing Protocol [IGRP], Enhanced IGRP [EIGRP], Border Gateway Protocol Version 4 [BGPv4, IS-ISv4]) are supported for load balancing and constructing scalable LANs. The IP Services image is required.
Policy-based routing (PBR) allows superior control by facilitating flow redirection regardless of the routing protocol configured. The IP Services image is required.
HSRP provides dynamic load balancing and failover for routed links; up to 32 HSRP links supported per unit or stack.
Inter-VLAN IP routing for full Layer 3 routing between 2 or more VLANs.
Protocol Independent Multicast (PIM) for IP multicast routing is supported, including PIM sparse mode (PIM-SM), PIM dense mode (PIM-DM), and PIM sparse-dense mode. The IP Services image is required.
Routing is possible across the stack.
128 switch virtual interfaces (SVIs) are recommended. Maximum of 1000 are supported (depending on the number of routes and multicast entries). 468 routed ports are supported per stack. |
Integrated Cisco IOS Software Features
for Bandwidth Optimization | Per-port broadcast, multicast, and unicast storm control prevents faulty end stations from degrading overall systems performance.
IEEE 802.1d Spanning Tree Protocol support for redundant backbone connections and loop-free networks simplifies network configuration and improves fault tolerance.
PVST+ allows for Layer 2 load sharing on redundant links to efficiently use the extra capacity inherent in a redundant design.
IEEE 802.1s Multiple Spanning Tree Protocol allows a spanning-tree instance per VLAN, for Layer 2 load sharing on redundant links.
Equal-cost routing facilitates Layer 3 load balancing and redundancy across the stack.
Local Proxy Address Resolution Protocol (ARP) works in conjunction with Private VLAN Edge to minimize broadcasts and maximize available bandwidth.
VLAN1 minimization allows VLAN1 to be disabled on any individual VLAN trunk link.
VLAN Trunking Protocol (VTP) pruning limits bandwidth consumption on VTP trunks by flooding broadcast traffic only on trunk links required to reach the destination devices.
Internet Group Management Protocol (IGMP) snooping provides fast client joins and leaves of multicast streams and limits bandwidth-intensive video traffic to only the requestors.
Multicast VLAN Registration (MVR) continuously sends multicast streams in a multicast VLAN while isolating the streams from subscriber VLANs for bandwidth and security reasons.
Up to 48 EtherChannel groups are supported per stack. |
| QoS and Control |
| Advanced QoS | Cross-stack QoS allows QoS to be configured across the entire stack.
802.1p class of service (CoS) and differentiated services code point (DSCP) field classification is provided, using marking and reclassification on a per-packet basis by source and destination IP address, source and destination MAC address, or Layer 4 Transmission Control Protocol/User Datagram Protocol (TCP/UDP) port number.
Cisco control-plane and data-plane QoS ACLs on all ports help ensure proper marking on a per-packet basis.
4 egress queues per port help enable differentiated management of up to 4 traffic types across the stack.
Shaped Round Robin (SRR) scheduling helps ensure differential prioritization of packet flows by intelligently servicing the ingress queues and egress queues.
Weighted Tail Drop (WTD) provides congestion avoidance at the ingress and egress queues before a disruption occurs.
Strict priority queuing helps ensure that the highest-priority packets are serviced ahead of all other traffic.
There is no performance penalty for highly granular QoS capability. |
| Network Security |
| Networkwide Security Features | IEEE 802.1x allows dynamic, port-based security, providing user authentication.
IEEE 802.1x with VLAN assignment allows a dynamic VLAN assignment for a specific user regardless of where the user is connected.
IEEE 802.1x with voice VLAN permits an IP phone to access the voice VLAN irrespective of the authorized or unauthorized state of the port.
IEEE 802.1x and port security are provided to authenticate the port and manage network access for all MAC addresses, including that of the client.
IEEE 802.1x with an ACL assignment allows for specific identity-based security policies regardless of where the user is connected.
IEEE 802.1x with guest VLAN allows guests without 802.1x clients to have limited network access on the guest VLAN.
Cisco security VLAN ACLs on all VLANs prevent unauthorized data flows from being bridged within VLANs.
Cisco standard and extended IP security router ACLs define security policies on routed interfaces for control-plane and data-plane traffic.
Port-based ACLs for Layer 2 interfaces allow security policies to be applied on individual switch ports.
Secure Shell (SSH) Protocol, Kerberos, and Simple Network Management Protocol Version 3 (SNMPv3) provide network security by encrypting administrator traffic during Telnet and SNMP sessions. SSH Protocol, Kerberos, and the cryptographic version of SNMPv3 require a special cryptographic software image because of U.S. export restrictions.
Private VLAN Edge provides security and isolation between switch ports, which helps ensure that users cannot snoop on other users' traffic.
Dynamic ARP Inspection helps ensure user integrity by preventing malicious users from exploiting the insecure nature of the ARP protocol.
DHCP Snooping prevents malicious users from spoofing a DHCP server and sending out bogus addresses. This feature is used by other primary security features to prevent a number of other attacks such as ARP poisoning.
IP source guard prevents a malicious user from spoofing or taking over another user's IP address by creating a binding table between client's IP and MAC address, port, and VLAN.
Bidirectional data support on the Switched Port Analyzer (SPAN) port allows a Cisco Intrusion Detection System (IDS) to take action when an intruder is detected.
TACACS+ and RADIUS authentication facilitate centralized control of the switch and restrict unauthorized users from altering the configuration.
MAC address notification allows administrators to be notified of users added to or removed from the network.
DHCP Snooping helps administrators with consistent mapping of IP to MAC addresses. This can be used to prevent attacks that attempt to poison the DHCP binding database and to rate-limit the amount of DHCP traffic that enters a switch port.
Port security secures the access to an access or trunk port based on MAC address.
After a specific timeframe, the aging feature removes the MAC address from the switch to allow another device to connect to the same port.
Trusted boundary provides the ability to trust the QoS priority settings if an IP phone is present and to disable the trust setting in the event that the IP phone is removed, thereby preventing a malicious user from overriding prioritization policies in the network.
Multilevel security on console access prevents unauthorized users from altering the switch configuration.
The user-selectable address-learning mode simplifies configuration and enhances security.
Bridge protocol data unit (BPDU) guard shuts down Spanning Tree PortFast-enabled interfaces when BPDUs are received to avoid accidental topology loops.
Spanning Tree Root Guard (STRG) prevents edge devices not in the network administrator's control from becoming Spanning Tree Protocol root nodes.
IGMP filtering provides multicast authentication by filtering out nonsubscribers and limits the number of concurrent multicast streams available per port.
Dynamic VLAN assignment is supported through implementation of VLAN Membership Policy Server client capability to provide flexibility in assigning ports to VLANs. Dynamic VLAN facilitates the fast assignment of IP addresses.
Cisco CMS Software security wizards ease the deployment of security features for restricting user access to a server as well as to a portion or all of the network.
1000 access control entries (ACEs) are supported. |
| Manageability |
| Superior Manageability | Cisco IOS Software CLI support provides common user interface and command set with all Cisco routers and Cisco Catalyst desktop switches.
Switching Database Manager templates for access, routing, and VLAN deployment allow the administrator to easily maximize memory allocation to the desired features based on deployment-specific requirements.
VLAN trunks can be created from any port, using either standards-based 802.1Q tagging or the Cisco Inter-Switch Link (ISL) VLAN architecture.
Up to 1005 VLANs per switch or stack and up to 128 spanning-tree instances per switch are supported.
4000 VLAN IDs are supported.
Voice VLAN simplifies telephony installations by keeping voice traffic on a separate VLAN for easier administration and troubleshooting.
Cisco VLAN Trunking Protocol (VTP) supports dynamic VLANs and dynamic trunk configuration across all switches.
Cisco Group Management Protocol server functions allow a switch to serve as the
Cisco Group Management Protocol router for client switches.
IGMP snooping provides fast client joins and leaves of multicast streams and limits bandwidth-intensive video traffic to only the requestors.
Remote Switch Port Analyzer (RSPAN) allows administrators to remotely monitor ports in a Layer 2 switch network from any other switch in the same network.
For enhanced traffic management, monitoring, and analysis, the Embedded Remote Monitoring (RMON) software agent supports 4 RMON groups (history, statistics, alarms, and events).
Layer 2 traceroute eases troubleshooting by identifying the physical path that a packet takes from source to destination.
All 9 RMON groups are supported through a SPAN port, which permits traffic monitoring of a single port, a group of ports, or the entire stack from a single network analyzer or RMON probe.
Domain Name System (DNS) provides IP-address resolution with user-defined
device names.
Trivial File Transfer Protocol (TFTP) reduces the cost of administering software upgrades by downloading from a centralized location.
Network Timing Protocol (NTP) provides an accurate and consistent timestamp to all intranet switches.
Multifunction LEDs per port for port status; half-duplex and full-duplex mode; and 10BASE-T, 100BASE-TX, and 1000BASE-T indication as well as switch-level status LEDs for system, redundant-power supply, and bandwidth utilization provide a comprehensive and convenient visual management system.
SPAN works across all the ports in a stack. |
| Cisco Network Assistant Software | Cisco Network Assistant Software provides an easy-to-use, Web-based management interface through a standard Web browser.
Simplified port configuration via Cisco Smartports.
Cisco AVVID (Architecture for Voice, Video and Integrated Data) wizards need just a few user inputs to automatically configure the switch to optimally manage different types of traffic: voice, video, multicast, and high-priority data.
A security wizard is provided to restrict unauthorized access to applications, servers, and networks.
Cisco Network Assistant Software allows management of a small network of Cisco Catalyst 3750-E, 3750, 3560-E, 3560, 3550, 2960, and 2950 Series Switches through a single IP address, without the limitation of being physically located in the same wiring closet. Full backward compatibility helps ensure any combination of these switches can be managed with a Cisco Catalyst 3750 Series Switch.
Drag-and-Drop Cisco IOS Software upgrade simplifies the process of upgrading Cisco IOS Software by not involving a Trivial File Transfer Protocol (TFTP) server.
The software upgrade feature allows one-click software upgrade of multiple switches in a community of Cisco Catalyst 3750-E, 3750, 3560-E, 3560, 3550, 2960, and 2950 Series Switches. Configuration cloning facilitates rapid deployment of networks. The master switch automatically upgrades each stack.
Cisco Network Assistant Software has been extended to include multilayer feature configurations such as routing protocols, ACLs, and QoS parameters.
Cisco clustering now supports member discovery and cluster creation across a single Cisco Catalyst 3750 Series Switch routed hop, allowing the entire LAN to be managed through a single Web interface (and with a single IP address, if desired).
Cisco Network Assistant Software Guide Mode assists in the configuration of powerful advanced features by providing step-by-step instructions.
Cisco Network Assistant Software provides enhanced online help for context-sensitive assistance.
The easy-to-use graphical interface provides both a topology map and front-panel view of the cluster and stacks.
Multidevice and multiport configuration capabilities allow administrators to save time by configuring features across multiple switches and ports simultaneously.
Web-based management for a Cisco Aironet wireless access point is launched by clicking the relevant icon in the topology map.
The user-personalized interface allows modification of polling intervals, table views, and other settings within Cisco CMS Software and retains these settings.
Alarm notification provides automated e-mail notification of network errors and alarm thresholds. |
| Performance | 32-Gbps switching fabric
Stack-forwarding rate of 38.7 mpps for 64-byte packets
Forwarding rate: 6.5 mpps (Cisco Catalyst 3750-24TS, 3750-24FS, and 3750-24PS), 13.1 mpps (Cisco Catalyst 3750-48TS and 3750-48PS), 17.8 mpps (Cisco Catalyst 3750G-12S), 35.7 mpps (Cisco Catalyst 3750G-24T), 38.7 mpps (Cisco Catalyst 3750G-24TS and 3750G-24WS), 35.7 mpps (Cisco Catalyst 3750G-16TD), 38.7 mpps (Cisco Catalyst 3750G-24TS-1U), 38.7 mpps (Cisco Catalyst 3750G-24PS), 38.7 mpps (Cisco Catalyst 3750G-48TS), 38.7 mpps (Cisco Catalyst 3750G-48PS)
128 MB DRAM and 16 MB Flash memory (Cisco Catalyst 3750G-24TS, 3750G-24WS, 3750G-24T, 3750G-12S, 3750-24TS, 3750-24PS, 3750-48TS, 3750-48PS, and 3750G-16TD)
128 MB DRAM and 32 MB Flash memory (Cisco Catalyst 3750G-24TS-1U, 3750G-24WS, 3750G-24PS, 3750G-48TS, 3750G-48PS, and 3750-24FS)
Configurable up to 12,000 MAC addresses (Cisco Catalyst 3750G-24TS, 3750G-24WS, 3750G-24T, 3750G-12S, 3750-24TS, 3750-24FS, 3750-24PS, 3750-48TS, 3750-48PS, 3750G-24TS-1U, 3750G-24PS, 3750G-48TS, 3750G-48PS, and 3750G-16TD)
Configurable up to 20,000 unicast routes (Cisco Catalyst 3750G-12S) and up to 11,000 unicast routes (Catalyst 3750G-24TS, 3750G-24WS, 3750G-24T, 3750-24TS, 3750-24FS, 3750-24PS, 3750-48TS, 3750-48PS, 3750G-24TS-1U, 3750G-24PS, 3750G-48TS, 3750G-48PS, and 3750G-16TD)
Configurable up to 1000 IGMP groups and multicast routes (Cisco Catalyst 3750G-24TS, 3750G-24WS, 3750G-24T, 3750G-12S, 3750-24TS, 3750-24FS, 3750-24PS, 3750-48TS, 3750-48PS, 3750G-24TS-1U, 3750G-24PS, 3750G-48TS, 3750G-48PS, and 3750G-16TD)
Configurable maximum transmission unit (MTU) of up to 9000 bytes, with a maximum Ethernet frame size of 9018 bytes (jumbo frames) for bridging on Gigabit Ethernet ports, and up to 1546 bytes for bridging and routing on Fast Ethernet ports |
| Indicators | Per-port status LEDs: link integrity, disabled, activity, speed, and full-duplex indications
System-status LEDs: system, RPS, and bandwidth-utilization indications |
| Dimensions (H x W x D) | 2.59 x 17.5 x 11.6 in. (6.6 x 44.5 x 29.5 cm) (Cisco Catalyst 3750G-24TS)
2.59 x 17.5 x 11.6 in. (6.6 x 44.5 x 29.5 cm) (Cisco Catalyst 3750G-24WS)
1.73 x 17.5 x 12.8 in. (4.4 x 44.5 x 32.6 cm) (Cisco Catalyst 3750G-24T)
1.73 x 17.5 x 12.8 in. (4.4 x 44.5 x 32.6 cm) (Cisco Catalyst 3750G-12S)
1.73 x 17.5 x 11.8 in. (4.4 x 44.5 x 30 cm) (Cisco Catalyst 3750-48TS)
1.73 x 17.5 x 11.8 in. (4.4 x 44.5 x 30 cm) (Cisco Catalyst 3750-24TS)
1.73 x 17.5 x 11.8 in. (4.4 x 44.5 x 30 cm) (Cisco Catalyst 3750-24FS)
1.73 x 17.5 x 14.8 in. (4.4 x 44.5 x 37.8 cm) (Cisco Catalyst 3750-48PS)
1.73 x 17.5 x 11.8 in. (4.4 x 44.5 x 30 cm) (Cisco Catalyst 3750-24PS)
1.73 x 17.5 x 16.1 in. (4.4 x 44.5 x 40.9 cm) (Cisco Catalyst 3750G-16TD)
1.73 x 17.5 x 14.9 in. (4.4 x 44.5 x 37.8 cm) (Cisco Catalyst 3750G-24TS-1U)
1.73 x 17.5 x 14.9 in. (4.4 x 44.5 x 37.8 cm) (Cisco Catalyst 3750G-24PS)
1.73 x 17.5 x 16.1 in. (4.4 x 44.5 x 40.9 cm) (Cisco Catalyst 3750G-48TS)
1.73 x 17.5 x 16.1 in. (4.4 x 44.5 x 40.9 cm) (Cisco Catalyst 3750G-48PS) |
| Weight | 12.5 lb (5.7 kg) (Cisco Catalyst 3750G-24TS)
21 lb (9.5 kg) (Cisco Catalyst 3750G-24WS)
10.0 lb (4.6 kg) (Cisco Catalyst 3750G-24T, Cisco Catalyst 3750G-12S)
9.1 lb (4.1 kg) (Cisco Catalyst 3750-48TS, Cisco Catalyst 3750G-12S-SD)
8.0 lb (3.6 kg) (Cisco Catalyst 3750-24TS)
13.2 lb (6.0 kg) (Cisco Catalyst 3750-48PS)
11.3 lb (5.1 kg) (Cisco Catalyst 3750-24PS)
12.5 lb (5.7 kg) (Cisco Catalyst 3750G-16TD)
12 lb (5.5 kg) (Cisco Catalyst 3750G-24TS-1U)
13.5 lb (6.1 kg) (Cisco Catalyst 3750G-24PS)
14 lb (6.4 kg) (Cisco Catalyst 3750G-48TS)
15.5 lb (7.0 kg) (Cisco Catalyst 3750G-48PS) |
| Environmental Ranges | Operating temperature: 32 to 113ºF (0 to 45ºC)
Storage temperature: -13 to 158ºF (-25 to 70ºC)
Operating relative humidity: 10 to 85% (noncondensing)
Operating altitude: up to 10,000 ft (3049 m)
Storage altitude: up to 15,000 ft (4573 m) |
| Acoustic Noise | International Organization for Standardization (ISO) 7779: bystander position operating to an ambient temperature of 30ºC |
| Non-PoE Models | Cisco Catalyst 3750G-24TS: 42 dB
Cisco Catalyst 3750G-24WS: 42 dB
Cisco Catalyst 3750G-24T: 42 dB
Cisco Catalyst 3750G-12S: 42 dB
Cisco Catalyst 3750-48TS: 42 dB
Cisco Catalyst 3750-24TS: 42 dB
Cisco Catalyst 3750-24FS: 38 dB
Cisco Catalyst 3750G-16TD: 42 dB
Cisco Catalyst 3750G-48TS: 48 dB
Cisco Catalyst 3750G-24TS-1U: 42 dB |
| PoE Models (Levels Increase with Amount of Active PoE ports) | Cisco Catalyst 3750-48PS: 42-48 dB
Cisco Catalyst 3750-24PS: 38-42 dB
Cisco Catalyst 3750G-48PS: 52-58 dB
Cisco Catalyst 3750G-24PS: 38-44 dB |
| Mean Time Between Failure (MTBF) | 188,574 hours (Cisco Catalyst 3750G-24TS)
209,170 hours (Cisco Catalyst 3750G-24WS)
210,936 hours (Cisco Catalyst 3750G-24T)
215,000 hours (Cisco Catalyst 3750G-12S)
259,729 hours (Cisco Catalyst 3750G-12S-SD)
217,824 hours (Cisco Catalyst 3750-48TS)
294,928 hours (Cisco Catalyst 3750-24TS)
269,011 hours (Cisco Catalyst 3750-24FS)
166,408 hours (Cisco Catalyst 3750-48PS)
209,170 hours (Cisco Catalyst 3750-24PS)
184,422 hours (Cisco Catalyst 3750G-16TD)
165,243 hours (Cisco Catalyst 3750G-48TS)
141,005 hours (Cisco Catalyst 3750G-48PS)
221,150 hours (Cisco Catalyst 3750G-24TS-1U)
182,373 hours (Cisco Catalyst 3750G-24PS) |
