Intro to Cisco Commands

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• Intro to Cisco Commands

Lecture 2B Hassan Shuja 02/21/2006
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Cisco Commands

• Cisco Commands
• Question mark next to letter gives you all the
  commands that start with that letter
• Question mark after command show all the next
  possible commands

Baltimore-1show a? access-expression
access-lists accounting aliases alps arp
async Baltimore-1show a
Baltimore-1show arp ? Output modifiers
ltcrgt Baltimore-1show arp
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Cisco Commands

• Cisco Commands
• Tab Key will complete command
• Incomplete Command indicates that statement needs
  more information
• Invalid Input indicates that the command is not
  recognized

Baltimore-1show ip Incomplete
command. Baltimore-1
Baltimore-1sh kdf
Invalid input detected at '' marker. Baltimore-1

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Cisco Commands

• Cisco Commands
• Ambiguous command indicates that command is not
  specific enough

Baltimore-1show a Ambiguous command "sh
a" Baltimore-1
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Cisco Memory

• Cisco Memory
• Flash
• Memory where IOS image is kept
• Copies of the configuration can also be kept in
  this space
• NVRAM
• Maintains the configuration of the device

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Cisco Management

• Cisco Access Management
• Console Port
• A terminal connection attached to a computer
• Auxiliary (Aux) port
• Used for out-of-band access via a modem
• VTY Virtual terminal line (Telnet)
• Access to device through telnet session

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Cisco Configuration

• Saving Configuration
• Running Configuration
• The configuration that is used while the system
  is on
• Start-up Configuration
• The configuration that is loaded onto the system
  when the system is started
• Once started, the configuration becomes running
  configuration
• copy running-config startup-config is the syntax
  used to save the configuration

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Cisco Cabling

• Cabling
• Straight-through Cabling
• In a straight-through cable, the colored wires
  are in the same sequence at both ends of the cable

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Cisco Cabling

• Cabling
• Crossover Cable
• In a crossover cable, the first (far left)
  colored wire at one end of the cable is the third
  colored wire at the other end of the cable

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Cisco Cabling

• Cabling
• Rolled Cable
• In a rolled cable, the colored wires at one end
  of the cable are in the reverse sequence of the
  colored wires at the other end of the cable