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Itn6 instructor materials_chapter2
1.
© 2008 Cisco
Systems, Inc. All rights reserved. Cisco ConfidentialPresentation_ID 1 Instructor Materials Chapter 2: Configure a Network Operating System CCNA Routing and Switching Introduction to Networks v6.0
2.
© 2008 Cisco
Systems, Inc. All rights reserved. Cisco ConfidentialPresentation_ID 10 Chapter 2: Configure a Network Operating System Introduction to Networks v6.0
3.
© 2008 Cisco
Systems, Inc. All rights reserved. Cisco ConfidentialPresentation_ID 11 2.1 IOS Bootcamp
4.
Presentation_ID 12© 2008
Cisco Systems, Inc. All rights reserved. Cisco Confidential IOS Bootcamp Cisco IOS Operating Systems • PC OS allows users to interact with the computer • Cisco IOS is also an Operating System • Cisco IOS allows users to interact with Cisco devices. All Cisco networking devices come with a default IOS. It is possible to upgrade the IOS version or feature set.
5.
Presentation_ID 13© 2008
Cisco Systems, Inc. All rights reserved. Cisco Confidential IOS Bootcamp Cisco IOS Access Access Methods • Console:-The console port is a management port that provides out-of-band access to a Cisco device. • Auxiliar:-methods for remotely accessing the CLI. • Virtual Terminal (Telnet / SSH) • SSH :-Secure Shell Terminal Emulation Programs • PuTTY • Tera Term • SecureCRT
6.
Presentation_ID 14© 2008
Cisco Systems, Inc. All rights reserved. Cisco Confidential IOS Bootcamp Navigate the IOS Cisco IOS Modes of Operation • Initial configuration must be done via console connection • Configuration is then done via various CLI command modes. Primary Command Modes - User EXEC Mode:- ONLY some basic monitoring ---(don’t have full access to the device) Router> Privileged EXEC Mode:-Monitoring and some troubleshooting Router>enable Router# Configuration Command Modes • The Configure Terminal command enters the Global Configuration Mode. • Sub-configuration modes are accessible from the Privileged EXEC Mode. • Examples are: swtich(config-line)# and switch(config-if)# Navigate Between IOS Modes • The enable command enters the Privileged EXEC Mode. • The exit commands exits to the parent command mode.
7.
© 2008 Cisco
Systems, Inc. All rights reserved. Cisco ConfidentialPresentation_ID 15 2.2 Basic Device Configuration
8.
Presentation_ID 16© 2008
Cisco Systems, Inc. All rights reserved. Cisco Confidential Basic Device Configuration Hostnames Device Names • Hostnames allow devices to be identified by network administrators over a network or the Internet. • Very important and should also be displayed in the topology. Configure Hostnames • IOS hostnames should: • Start with a letter • Contain no spaces • End with letter or digit • Use only letters, digits or dashes • Be less than 64 characters in length
9.
Presentation_ID 17© 2008
Cisco Systems, Inc. All rights reserved. Cisco Confidential Basic Device Configuration Limit Access to Device Configurations Secure Device Access • Secure privileged EXEC and user EXEC access with a password. • Secure virtual terminal lines with a password. Configure Passwords • Use strong passwords. • Avoid re-using passwords Encrypt Passwords • Cisco IOS displays passwords in plain text by default. • Passwords should be encrypted. Banner Messages • Important part of the legal process in the event that someone is prosecuted for breaking into a device. • Wording that implies that a login is "welcome" or "invited" is not appropriate. • Often used for legal notification because it is displayed to all connected terminals.
10.
Presentation_ID 18© 2008
Cisco Systems, Inc. All rights reserved. Cisco Confidential Basic Device Configuration Save Configurations Save the Running Configuration File • File stored in NVRAM that contains all of the commands that will be used upon startup or reboot • NVRAM does not lose its contents when the device is powered off. Alter the Running Configuration • File stored in RAM that reflects the current configuration, modifying affects the operation of a Cisco device immediately. • RAM loses all of its content when the device is powered off or restarted. Capture Configuration to a Text File • Configuration files can also be saved and archived to a text document. • The configuration can then be edited with any text editor and placed back in the device.
11.
© 2008 Cisco
Systems, Inc. All rights reserved. Cisco ConfidentialPresentation_ID 19 2.3 Address Schemes
12.
Presentation_ID 20© 2008
Cisco Systems, Inc. All rights reserved. Cisco Confidential Address Schemes Ports and Addresses IP Addresses:is a numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication • Each end device on a network must be configured with an IP address. • Enable devices to establish end-to-end communication on the Internet. • The structure of an IPv4 address is called dotted decimal notation and is represented by four decimal numbers between 0 and 255. • IPv6 is the most recent version of IP and the replacement for the more common IPv4. Interface and Ports • Network communications depend on interfaces and the cables that connect them. • Different types of network media have different features and benefits. • Ethernet is the most common local area network (LAN) technology. • SVI provides a means to remotely manage a switch over a
13.
Presentation_ID 21© 2008
Cisco Systems, Inc. All rights reserved. Cisco Confidential Address Schemes Configure IP Addressing Manual IP Address Configuration for End Devices • To manually configure an IPv4 address on a Windows host, open the Control Panel > Network Sharing Center > Change adapter settings and choose the adapter. • Next right-click and select Properties to display the Local Area Connection Properties shown in Figure 1. Automatic IP Address Configuration for End Devices • DHCP enables automatic IPv4 address configuration for every end device that has DHCP enabled. No extra configuration is needed. Switch Virtual Interface Configuration • To configure an SVI on a switch, use the interface vlan 1 global configuration command. Vlan 1 is not an actual physical interface but a virtual one.
14.
Presentation_ID 22© 2008
Cisco Systems, Inc. All rights reserved. Cisco Confidential Address Schemes Verifying Connectivity Interface Addressing Verification • Cisco IOS supports commands to allow IP configuration verification. End-To-End Connectivity Test • The ping command can be used to test connectivity to another device on the network or a website on the Internet.
15.
© 2008 Cisco
Systems, Inc. All rights reserved. Cisco ConfidentialPresentation_ID 23 2.4 Chapter Summary
16.
Presentation_ID 24© 2008
Cisco Systems, Inc. All rights reserved. Cisco Confidential Explain the features and functions of Cisco IOS Software. Configure initial settings on a network device using the Cisco IOS software. Given an IP addressing scheme, configure IP address parameters on end devices to provide end-to-end connectivity in a small to medium-sized business network. Chapter Summary Summary
17.
Presentation_ID 28© 2008
Cisco Systems, Inc. All rights reserved. Cisco Confidential
18.
Presentation_ID 29© 2008
Cisco Systems, Inc. All rights reserved. Cisco Confidential
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