Cisco 2970G 24TS - Catalyst - Ethernet Switch Manual do Utilizador descarregar pdf (Página 2)

Q. Can Cisco Catalyst 2970 Series Switches stack with Cisco Catalyst 3560 Series Switches?

A. No. Cisco Catalyst 2970 Series Switches cannot stack with Cisco Catalyst 3560 Series Switches via Cisco GigaStack® stacking.

Q. Do Cisco Catalyst 2970 Series Switches have Redundant Power Supply (RPS) support?

A. Yes. Cisco Catalyst 2970 Series Switches can be supported by the Cisco RPS 675. The Cisco RPS 300 can be used with the Catalyst

2970G-24T, but not the Catalyst 2970G-24TS. The Cisco RPS 675 must be used for the latter. Both the Cisco RPS 675 and the Cisco

RPS 300 provide superior internal power source redundancy for up to six Cisco networking devices, resulting in improved fault

tolerance and network uptime.

Q. What is the difference between the Cisco RPS 675 and the Cisco 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 -48V 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. The

Catalyst 2970G-24TS is supported only by the Cisco RPS 675.

INTELLIGENT SWITCHING

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:

●

Increase in desktop computing power

●

Introduction of bandwidth-intensive applications

●

Expansion of highly sensitive data on the network

●

Presence of multiple device types, such as IP phones and wireless LAN (WLAN) access points

These 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 effective management of 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 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 infrastructure 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 is critical to further optimizing network operations.

Q. Can you provide more details on how Cisco intelligent switching will help my network?

A. Applications such as enterprise resource planning (ERP) (Oracle and SAP, for example), voice (IP telephony traffic), and CAD/CAM

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 ensuring that voice traffic is

properly classified and prioritized throughout the network. Cisco Intelligent Ethernet switches implement superior QoS to help ensure

that network traffic is classified and prioritized.

Q. Why are intelligent services important when deploying Gigabit Ethernet at the network edge?

A. Intelligent services are important when deploying Gigabit Ethernet at the network edge to ensure that oversubscribed resources in the

core are available for business-critical and delay-sensitive traffic. With employees having 1000 Mbps at their disposal, network

resources could easily be overwhelmed with low-priority traffic without proper QoS policies to classify, police, and shape traffic.

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