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Initial Switch Configuration
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CERTIFICATION OBJECTIVES
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1201 1202 1203 1204 2960 Overview Switch Startup Basic Switch Configuration Basic Switch Operation and Verification 1205 Port Security Feature Two-Minute Drill Self Test
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Copyright 2008 by The McGraw-Hill Companies Click here for terms of use
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12: Initial Switch Con guration
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he 2940, 2955, and 2960 series of switches are Cisco s current desktop and workgroup switching solution; they replace the 1900 and 2950 switches The new switches support Fast Ethernet and Gigabit Ethernet interfaces This book, and the CCNA exam, focus on the end-of-sale 2950 and the newer 2960 switches, but the topics and configuration commands discussed in this chapter apply to all of Cisco s Catalyst switches running the Internetwork Operating System (IOS)
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2960 Overview
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The 2960 series of switches comes with the LAN-based software image, which provides advanced quality of service, rate limiting, access control list (ACL), and many other features Table 12-1 compares the 2960 switches and their port types and capacities The dual-purpose Gigabit Ethernet (GE) port supports a 10/100/1000 port and an SFP (fiber) port, where one of the two ports (not both) can be used If a 2960 supports dual-ports, this is displayed in the Dual-Purpose column of Table 12-1 The 2960 series supports an optional external redundant power supply (RPS) that can be attached to the rear of the chassis
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TABLE 12-1
2960 Models
Switch
WS-C2960-8TC-L WS-C2950-24TT-L WS-C2960-48TT-L WS-C2950-24TC-L WS-C2960-48TC-L WS-C2960G-8TC-L WS-C2960G-24TC-L WS-2960G-48TC-L
10/100 BaseTX
8 24 48 24 48 0 0 0
10/100/1000 BaseTX
0 2 2 0 0 7 20 44
Dual-Purpose GE
1 0 0 2 2 1 4 4
2960 Overview
Before you begin connecting any cables to your Cisco switches, you should become familiar with their chassis and interfaces First, you should understand how to turn on your Cisco device, what interfaces it has, and the meanings of the various LEDs (light-emitting diodes) on the chassis The next few sections cover this in more depth for the 2960
2960 Chassis
Figure 12-1 shows illustrations of the front (at top) and rear (at bottom) views of a 2960-24TT switch For the front view, the ports on the left are the 10/100 BaseTX ports and the two on the right are the two 10/100/1000 BaseTX ports For the 10/100 ports, the ports are numbered in the first column, 1 at the top and 2 at the bottom; in the second column, 3 at the top and 4 at the bottom; and so on The front of the chassis contains the MODE button as well as the LEDs The rear of the chassis has the management connections You ll notice that no toggle switch is included to turn the switch on or off To turn the switch on, plug one end of the power cable into the back of the switch and the other into a power outlet To turn the switch off, unplug the power cable from either end The 2960 supports an RJ-45 console interface, which uses a rollover cable for connectivity to a terminal or terminal emulation device for console access
FIGURE 12-1
Ports and LEDs 2960 Front
SYST RPS STAT DUPLX SPEED MODE
A 2950-24TT switch
2960 Rear
RJ-45 console port
Fan exhaust
RPS outlet
Power
12: Initial Switch Con guration
TABLE 12-2
SYSTEM
Color
Green Amber Off
Description
The system is up and operational The system experienced a malfunction The system is powered down The RPS is attached and operational The RPS is installed but is not operational Check the RPS to ensure that it hasn t failed Both the internal power supply and the external RPS are installed, but the RPS is providing power The RPS is not installed
2960 SYSTEM and RPS LEDs
Green Amber Flashing amber Off
2960 LEDs and MODE Button
Remember that if the SYSTEM LED is amber, the switch is experiencing a malfunction The front of the 2960 chassis has many LEDs that you can use to monitor the switch s activity and performance At the top-left of the 2960 s front chassis are the SYSTEM and RPS LEDs The colors of these LEDs and their meanings are shown in Table 12-2
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