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Q. What are the Cisco® Catalyst® 3750 Series switches?
A. The Cisco Catalyst 3750 Series switches are a premier line of enterprise-class, stackable, multilayer switches that provide high availability, network security, and quality of service (QoS) to enhance the operation of the network. Their innovative unified stack management raises the bar in stack management, redundancy, and failover.
With a range of Fast Ethernet, Gigabit Ethernet, and Power over Ethernet configurations, the Cisco Catalyst 3750 Series can serve as both a powerful access-layer switch for midsized enterprise wiring closets and as a backbone switch for midsized networks. Customers can deploy networkwide intelligent services, such as advanced QoS, rate limiting, Cisco security access control lists (ACLs), multicast management, and high-performance IP routing—while maintaining the simplicity of traditional LAN switching. Embedded in the Cisco Catalyst 3750 Series is the Cisco Cluster Management Suite (CMS) Software, which allows users to simultaneously configure and troubleshoot multiple Cisco Catalyst desktop switches using a standard Web browser.
Cisco CMS Software provides configuration wizards that greatly simplify the implementation of converged applications and networkwide services.
Table 1 Cisco Catalyst 3750 Series Switches
Q. What software images do the Cisco Catalyst 3750 Series switches support?
A. The Cisco Catalyst 3750 Series switches are available with the SMI or the EMI.
The Enhanced Multilayer Software Image (EMI) enables a richer set of enterprise-class features, including hardware-based IP unicast routing (Open Shortest Path First [OSPF], Interior Gateway Routing Protocol [IGRP], Enhanced IGRP [EIGRP], Border Gateway Protocol Version 4 [BGPv4]), multicast routing, and policy-based routing [PBR]. Flexibility to upgrade to EMI after the initial deployment is provided through an EMI upgrade kit. Additional details about the differences between the SMI and EMI are provided later in this document.
Q. Can I enable static IP routing using the SMI?
A. Yes, RIP and static routing are supported on the SMI. Dynamic IP routing protocols (OSPF, BGPv4, EIGRP, and IGRP) are available only on the EMI.
Q. Do both the SMI and the EMI allow Layer 3 and Layer 4 lookups for QoS and network security?
A. Yes.
Q. Does the Cisco Catalyst 3750 Series support Inter-Switch Link (ISL) VLAN trunking?
A. Yes, the Cisco Catalyst 3750 Series supports both 802.1Q trunking and ISL trunking. VLAN trunks can be created from any port using either standards-based 802.1Q tagging or the Cisco ISL VLAN architecture.
Q. Can the Cisco Catalyst 3750 Series switches stack with the Cisco Catalyst 3550 Series switches?
A. No. The Cisco Catalyst 3750 Series switches' new innovative Cisco StackWise`technology with 32-Gbps high-speed stacking bus is not compatible with the Cisco Catalyst 3550 Series switches' Cisco GigaStack® technology.
Q. Are there gigabit interface converter (GBIC)-to-SFP trade-in credits or programs?
A. No, there are no GBIC-to-SFP trade-in credits or programs.
Q. What are the benefits of Power over Ethernet?
A. Power over Ethernet can provide a lower total cost of ownership for deployments that incorporate Cisco IP phones and Cisco Aironet® wireless LAN access points, as well as any IEEE 802.3af-compliant end device. Power over Ethernet removes the need for wall power to each Power over Ethernet-enabled device and eliminates the cost for additional electrical cabling that would otherwise be necessary in IP phone and wireless LAN deployments.
Q. How many devices can the Cisco Catalyst 3750 Series power?
A. The Cisco Catalyst 3750 Series 24-port switches can support 24 simultaneous fully powered Power over Ethernet ports at 15.4 Watts (W) for maximum powered-device support. Using Cisco Catalyst Intelligent Power Management, the 48-port switches can deliver the necessary power to support 24 ports at 15.4W, 48 ports at 7.7W, or any combination in between.
Q. Does the Cisco Catalyst 3750 Series support standards-based Power over Ethernet?
A. Yes. The Cisco Catalyst 3750 Series supports IEEE 802.3af. The Cisco Catalyst 3750 Series provides investment protection for the installed base of Cisco IP phones and Cisco Aironet wireless LAN access points by also supporting the Cisco prestandard Power over Ethernet (inline power).
Q. Can the Cisco Catalyst 3750 Series provide power to IEEE 802.3af and Cisco prestandard Power over Ethernet simultaneously?
A. Yes. The Catalyst Cisco 3750 Series will automatically detect the end point to provide the appropriate power without any user intervention.
Q. What is Cisco StackWise technology?
A. Cisco StackWise technology provides an innovative method for collectively using and extending the resources of a stack of switches. Up to nine switches can be joined together to create a single switching unit with a virtual 32-Gbps stack interconnection. Furthermore, the entire stack can be managed as one unit with a single IP address. To the rest of the network, the stack operates as a single switch. With a unified management interface, the customer can with one command load a single image to all compatible switches on the stack. Cisco StackWise technology is optimized for Gigabit Ethernet deployment, bringing customers new levels of performance through the high-speed interconnection, resiliency through advanced failover mechanisms, and ease of use through automated configuration and a single management interface.
Because of the Cisco StackWise technology, the Cisco Catalyst 3750 Series is highly scalable. There can be up to 252 Gigabit Ethernet ports in a stack. Switches within the stack can be added and removed without affecting network access. New devices take the global configuration from the stack master, and replacement devices take the exact configuration of the old device. There is one configuration file with all stack member configurations.
The innovative design of the Cisco Catalyst 3750 Series sets the bar of availability in stackable switches. It supports link- and switch-level redundancy. The Cisco Catalyst 3750 Series supports cross-stack Cisco EtherChannel® technology as well as Cross-Stack UplinkFast (with subsecond failover), and cross-stack equal-cost routes across different switches in the stack. These features eliminate dependency on Hot Standby Router Protocol (HSRP) for router failures. In the case of a master switch failure, another master switch takes over with minimal disruption within 2 to 3 seconds.
For more information about Cisco StackWise technology, go to:
http://www.cisco.com/go/catalyst3750 .
Q. What are Small Form-Factor Pluggables (SFPs)?
A. SFPs are transceivers that provide Gigabit Ethernet connectivity from the Cisco Catalyst 3750 Series to distribution-layer switches. They are functionally equivalent to GBICs, but are much smaller.
Q. What SFPs are supported on the Cisco Catalyst 3750 Series?
A. The Cisco Catalyst 3750 Series supports 1000BASE-LX, 1000BASE-SX, 1000BASE-ZX, 1000BASE-T, and coarse wavelength-division multiplexing (CWDM) (supported after Cisco IOS® Software Release 12.1(14)EA) SFPs.
Q. Can the 1000BASE-T SFP support 10/100/1000 speeds?
A. Yes, the 1000BASE-T SFP can support 10/100/1000 speeds on the Cisco Catalyst 3750 Series.
Q. Does the Cisco Catalyst 3750 Series interoperate with SFPs from other vendors?
A. No, like other Cisco switches and routers, the Cisco Catalyst 3750 Series does not interoperate with other vendors' SFPs. The switch will shut down the port if another vendor's SFP is inserted.
Q. Is there a limit to the number of SFPs that can be used on a Cisco Catalyst 3750 Series Switch?
A. No. Users can populate all the SFP ports of any Cisco Catalyst 3750 Series Switch with the same SFP or with a combination of different SFPs. The Cisco Catalyst 3750 Series supports the following Cisco SFPs: 1000BASE-SX, 1000BASE-LX/LH, 1000BASE-T, and 1000BASE-CWDM (with Cisco IOS Software Release 12.1[19]EA1).
Q. Does the Cisco Catalyst 3750 Series have redundant power supply support?
A. Yes. The Cisco Catalyst 3750 Series can be supported by the Cisco RPS 675 Redundant Power System and the Cisco RPS 300 Redundant Power System. However, the Cisco RPS 300 has reached end of sale. The last date to order the Cisco RPS 300 is December 2003. Cisco recommends the Cisco RPS 675, especially when connecting to Power Over Ethernet switches. Both the Cisco RPS 675 and RPS 300 provide superior internal power-source redundancy for up to six Cisco networking devices. This results in improved fault tolerance and network uptime. For more information go to:
http://www.cisco.com/en/US/products/hw/accessor/ps2883/products_data_sheet09186a0080150e31.html .
Q. What is the difference between the Cisco RPS 675 and RPS 300?
A. The Cisco RPS 675 is the next generation of the Cisco RPS 300. It provides more power (675W) than the Cisco RPS 300 (300W). The Cisco RPS 675 can provide up to 375W of -48 volt (V) power, and 300W of 12V power. Unlike the Cisco RPS 300, the Cisco RPS 675 comes up in active mode. The customer does not need to push a button to activate the Cisco RPS 675 after a power failure.
Q. Does it cost more for a Layer 3 or special-features license?
A. The Cisco Catalyst 3750-24TS-E, Catalyst 3750-48TS-E, Catalyst 3750-24PS-E, Catalyst 3750-48PS-E, Catalyst 3750G-24T-E, Catalyst 3750G-24TS-E, and Catalyst 3750G-12S-E switches are loaded with the EMI, so all feature license fees are part of the standard list price. However, the Cisco Catalyst 3750-24TS-S, Catalyst 3750-48TS-S, Catalyst 3750-24PS-S, Catalyst 3750-48PS-S, Catalyst 3750G-24T-S, Catalyst 3750G-24TS-S, and Catalyst 3750G-12S-S switches are loaded with the SMI. Cisco Catalyst 3750-24TS-S, Catalyst 3750-48TS-S, Catalyst 3750-24PS-S, and Catalyst 3750-48PS-S can be upgraded to the EMI with the purchase of the EMI upgrade kit (part number CD-3750-EMI=). Cisco Catalyst 3750G-24T-S, Catalyst 3750G-24TS-S, and Catalyst 3750G-12S can also be upgraded to the EMI with the purchase of the EMI upgrade kit (part number CD-3750G-EMI=). The SMI includes RIP and static routing. For dynamic IP routing features (BGPv4, OSFP, EIGRP, and IGRP), the EMI is required.
Q. What features are only supported with the EMI?
A. The following features and capabilities are supported with the EMI:
Q. Why do I need intelligence at the edge of my network?
A. Networks are evolving to address four new developments at the network edge:
These new demands are contending for resources with many existing mission-critical applications. As a result, IT professionals must view the edge of the network as critical to effectively manage the delivery of information and applications. As companies increasingly rely on networks as the strategic business infrastructure, it is more important than ever to ensure their high availability, security, scalability, and control. By adding Cisco intelligent functions to the wiring closet, customers can now deploy networkwide intelligent services that address these requirements in a consistent way from the desktop to the core network and through the WAN.
With Cisco Catalyst intelligent Ethernet switches, Cisco Systems® helps companies to realize the full benefits of adding intelligent services to their networks. Deploying capabilities that make the network highly available to accommodate time-critical needs, scalable to accommodate growth, secure enough to protect confidential information, and capable of differentiating and controlling traffic flows are essential to optimizing network performance.
Q. Can you provide more details on how Cisco intelligent switching will help my network?
A. New applications are requiring higher bandwidth and the need to differentiate and control the traffic flow. Applications such as enterprise resource planning (ERP) (Oracle, SAP, etc.), voice (IP telephony traffic), and computer-aided design (CAD) require prioritization over less time-sensitive applications such as FTP or Simple Mail Transfer Protocol (SMTP). It would be highly undesirable to have a large file download destined to one port on a wiring closet switch and have quality implications, such as increased latency in voice traffic, destined to another port on this switch. This condition is avoided by properly classifying voice traffic and prioritizing it throughout the network. Cisco intelligent Ethernet switches implement superior QoS to help classify and prioritize network traffic and avoid congestion.
Q. How does the Cisco Catalyst 3750 Series manage network security?
A. With the rise in internal threats to a network, Cisco Ethernet switches enhance data security through a wide range of features including Secure Shell (SSH) Protocol, Simple Network Management Protocol Version 3 (SNMPv3), ACLs, 802.1X, port security, private VLAN edge, Dynamic Host Configuration Protocol (DHCP) interface tracker, MAC address notification, RADIUS, and TACACS+. Depending on your network security needs, the Cisco Catalyst 3750 Series complements devices such as firewalls, VPNs, and intrusion detection systems.
Q. For data security purposes, how can I protect my network from unauthorized users?
A. The Cisco Catalyst 3750 Series supports 802.1X, which works in conjunction with a RADIUS server to authenticate users as they access a network. The 802.1X standard is considered port-level security and is commonly used for wireless LANs. Additionally, portions of the network can be restricted by using ACLs. Access can be denied based on MAC addresses, IP addresses, or TCP and User Datagram Protocol (UDP) ports. ACL lookups are done in hardware—forwarding and routing performance are not compromised when implementing ACL-based security. An additional protection method is to use port security, which blocks unauthorized users by limiting access to the port based on MAC addresses.
Q. For data security purposes, how can I monitor or track activities in my network?
A. Intrusion detection systems are tailored to monitor and track activities in a network. The Cisco Catalyst 3750 Series can complement this capability through features such as MAC address notification, which will send an alert to a management station so that network administrators know when and where users come on to the network and can take appropriate actions. The DHCP Interface Tracker (Option 82) feature will track where a user is physically connected on a network by providing both switch and port ID to a DHCP server.
Q. For data security purposes, how do I protect administrative passwords and traffic going to the switch during configuration or troubleshooting?
A. To protect administrative traffic during the configuration or troubleshooting of a switch (such as passwords or device configuration settings), the best approach is to encrypt the data. Both SSH and SNMPv3 encrypt data during Telnet sessions and SNMP sessions.
Q. Does the Cisco Catalyst 3750 Series support Cisco Switch Clustering technology?
A. Yes, the Cisco Catalyst 3750 Series can be managed using the Web-based Cisco Cluster Management Suite (CMS) Software, which uses Cisco Switch Clustering technology. Cisco CMS Software is embedded in Cisco Catalyst 1900, Catalyst 2950, and Catalyst 3750 series switches; and Cisco Catalyst 2900 Series XL, Catalyst 2900 Series LRE XL, and Catalyst 3500 Series XL switches. Through Cisco Switch Clustering technology, users access Cisco CMS Software with any standard Web browser to manage up to 16 of these switches at once, regardless of their geographic proximity, with the option of using a single IP address if desired. With the addition of the Cisco Catalyst 3750 Series, Cisco CMS Software can now extend beyond routed boundaries for even more flexibility in managing a Cisco cluster.
Cisco CMS Software provides an integrated management interface for delivering intelligent services, enabling users to manage their entire LAN with one robust tool. By bringing the simplicity of traditional LAN switching to intelligent services such as multilayer switching, QoS, multicast, and security ACLs, Cisco CMS Software allows administrators to take advantage of benefits formerly reserved for only the most complex networks. The new Guide Mode in Cisco CMS Software leads the user step by step through the configuration of high-end features and provides enhanced online help for context-sensitive assistance. In addition, a Solution Wizard provides automated configuration of the switch for video streaming or videoconferencing. Future software will provide Solution Wizards for voice over IP (VoIP), mission-critical applications, and data security.
Cisco CMS Software supports standards-based connectivity options such as Ethernet, Fast Ethernet, Fast EtherChannel, Gigabit Ethernet, and Gigabit EtherChannel connectivity. Because Cisco Switch Clustering technology is not limited by proprietary stacking modules, stacking cables, or interconnection media, Cisco CMS Software expands the traditional cluster domain beyond a single wiring closet and lets users mix and match interconnections to meet specific management, performance, and cost requirements.
Cisco Catalyst 3750 Series switches can be configured either as command or member switches in a Cisco switch cluster. Cisco CMS Software also allows the network administrator to designate a standby or redundant command switch, which takes the commander duties should the primary command switch fail. Other important features include the ability to configure multiple ports and switches simultaneously, as well as perform software updates across the entire cluster at once. Bandwidth graphs and link reports provide useful diagnostic information and the topology map gives network administrators a quick view of the network status.
Q. Can Cisco CMS Software manage the Cisco Catalyst 3750 Series with other desktop switches?
A. All desktop switching platforms including the Cisco Catalyst 1900, Catalyst 2940, Catalyst 2950, Catalyst 2950 LRE, Catalyst 2970, Catalyst 3550, and Catalyst 3750 series switches; and Cisco Catalyst 2900 Series XL, Catalyst 2900 Series LRE XL, and Catalyst 3500 Series XL can be managed using the Cisco CMS Software.
Q. How is Cisco StackWise technology different from Cisco GigaStack technology?
A. Cisco GigaStack technology is a 1-Gbps stacking mechanism that allows traffic to pass between individual switches. Cisco StackWise technology is a 32-Gbps stack interconnect that unites all of the switches in a stack into one logical unit for switching and routing.
Q. What is the warranty for the Cisco Catalyst 3750 Series?
A. Cisco Catalyst 3750 Series switches come with the Cisco Limited Lifetime Hardware Warranty. Ongoing software updates are available to customers on www.cisco.com free of charge.
The hardware warranty available on the Cisco Catalyst 2950, Catalyst 3550, and Catalyst 3750 series and Cisco Catalyst 3500 Series XL is the Limited Lifetime Hardware Warranty. This warranty automatically comes with the purchase of eligible Cisco Catalyst products, free of charge. For specific details on the Limited Lifetime Hardware Warranty, please visit:
http://www.cisco.com/univercd/cc/td/doc/es_inpck/lh2cen__.htm
In addition to the Limited Lifetime Hardware Warranty, Cisco is offering ongoing Cisco IOS Software updates on LAN access switches free of charge for these platforms. For the life of the product, updates within the release and feature set purchased will be made available to customers through the Software Center at:
http://www.cisco.com/public/sw-center/sw-switching.shtml .
Ongoing software updates will be available for the Cisco Catalyst 3750 Series. Updates are applicable only for releases that Cisco makes available. This statement supersedes any previous warranty or software statement and is subject to change without notice.
Q. What types of service and support are available for the Cisco Catalyst 3750 Series?
A. A full complement of life-cycle service and support is available for the Cisco Catalyst 3750 Series. From implementation to operation and optimization, Cisco offers technical support and advanced service delivered either directly or through one of its best-in-class partners.
Technical support is available through Cisco SMARTnet® support and Cisco SMARTnet Onsite services. Cisco SMARTnet support augments the resources of your operations staff by providing them with access to expertise, both online and on the telephone, and a range of hardware Advance Replacement options. Cisco SMARTnet Onsite support complements the hardware Advance Replacement feature by adding the services of a field engineer—services that can be critical for those locations where staffing is insufficient or unavailable to replace parts. For more information about Cisco SMARTnet support, please visit:
http://www.cisco.com/warp/public/cc/serv/mkt/sup/tsssv/ index.shtml
Total Implementation Solutions offers a full range of implementation solutions including project management, project engineering, configuration, staging, and rollout coordination, to help ensure correct installation and deployment. Configuration services now include development and verification of configuration for intelligent services such as QoS and multicast. For more information about Total Implementation Solutions, visit:
http://www.cisco.com/warp/public/cc/serv/mkt/sup/advsv/ index.shtml
Q. Where can I find technical and product specifications and other additional information about the Cisco Catalyst 3750 Series?
A. For product literature including data sheets and product specifications, see the Cisco Catalyst 3750 Series Website at:
http://www.cisco.com/go/catalyst3750 .
Q. What are the part numbers for the Cisco Catalyst 3750 Series switches? When can they be ordered?
A. The part number and ordering information for the new Cisco Catalyst 3750 Series is available at:
http://www.cisco.com/go/catalyst3750 .
Posted: Tue Feb 10 01:49:51 PST 2004
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