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Chapter 6 Configuring a Router/ Learning About Other Devices/ Managing Cisco IOS Software. Objectives. Command-Line Interface Command Modes. Configuring a Router Name. Configuring Router Passwords. Examining the show Commands.
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Chapter 6Configuring a Router/ Learning About Other Devices/ Managing Cisco IOS Software
Examining the show Commands • Many show commands can be used to examine the contents of files in the router and for troubleshooting. • In both privileged EXEC and user EXEC modes, the command show ? provides a list of available show commands.
Configuring Interface Descriptions An interface description should identify important information such as a router, a circuit number, or a specific network segment.
Cisco Discovery Protocol (CDP) CDP is media and protocol independent, and runs on all Cisco equipment over the Subnetwork Access Protocol (SNAP).
Creating a Network Map • The show cdp neighbors [type number] [detail] command can be used to obtain the following: • Device ID — Address • Port ID — Capabilities • Version — Platform • IP network prefix • VTP management domain name (CDPv2 only) • Native VLAN (CDPv2 only) • Full/Halfduplex (CDPv2)
Establishing Telnet Connections • To initiate a Telnet session any of the following alternatives can be used: • Denver>connect paris • Denver>paris • Denver>131.108.100.152 • Denver>telnet paris • A hostname table or access to DNS for Telnet must be present for a name to work. Otherwise, the IP address of the remote router must be entered. • Telnet can be used to determine if a remote router can be accessed.
Advanced Telnet Operation Multiple Telnet sessions can be used and suspended with the Ctrl+Shift+6 then x sequence.
Configuration Register Values The order in which the router looks for system bootstrap information depends on the boot field setting in the configuration register. The default configuration register setting can be changed with the global configuration mode command config-register. Use a hexadecimal number as the argument for this command.