HON95-wiki/config/network/cisco-ios.md

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title: Cisco IOS breadcrumbs:

• title: Configuration
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Related Pages

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• Cisco IOS Routers
• Cisco IOS Switches

General Configuration

Simple Actions

• Save running config: copy run start or write mem
• Restore startup config: copy start run
• Show configurations: show [run|start]
  • | section <section> can be used to show a specific section.

AAA

• Disable the password-encryption service, use encrypted passwords instead.
• Use type 9 (scrypt) secrets.

Version String Convention

• Running example: 15.0(2)SE11
• Train (15.0SE): Like the major versjon number.
• Throttle (2): Like the minor version number.
• Rebuild (11): Like the patch version number. Omitted for rebuild zero. May be specified as a letter directly after the throttle for old versions.

Theory

CLI

Modes

• User EXEC mode (Router>).
• Privileged EXEC mode (Router#).
• Configuration modes:
  • Global configuration mode (Router(config)#).
  • Interface, line, etc. configuration mode (Router(config-xxx)#).
• Setup mode.
• ROMMON mode.

Using the CLI

• Tab: Auto-complete.
• ?: Prints the allowed keywords.
• |: Can be used to filter the output.

Configuration Mode

• Select range of interfaces: int range g1/0/1-52 (example)
• Reset interface(s): default int [range] <if>[-<end>]

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