Cisco IOS Operating System Flashcards

1
Q

Command Hierarchy: hostname>

A

User exec mode

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2
Q

Command Hierarchy: hostname#

A

Privileged Exec Mode

“Enable” to access

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3
Q

Command Hierarchy: hostname(config)#

A

Global Configuration Mode

“Configure Terminal” to access

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4
Q

Command Hierarchy: hostname(config-if)#

A

Interface Configuration Mode

“Interface X” to access

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5
Q

Command Hierarchy: Exit

A

Drops down a command level

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6
Q

Command Hierarchy: End

A

Drops back to privileged exec mode from any level

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7
Q

Context Sensitive Help: sh?

A

Show all commands beginning with “sh”

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8
Q

Context Sensitive Help: Show ?

A

Show all available keyword options for “show” command

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9
Q

Moving Cursor & Navigation

A

Ctrl-A
moves cursor to beginning of line

Ctrl-U
deletes the whole line

< and >
navigate letter by letter

Up and down arrow
cycle through previously entered commands at same hierarchy level

Enter
scroll show command option output line by line

Spacebar
show command output page by page

Ctrl-C
break out of show command output

Tab
completes partially entered command

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10
Q

Piped Commands

A

IOS CLI is not case sensitive unless you pipe commands

Show running-config | begin FastEthernet0/0
Show running-config | include FastEthernet0/0
Show running-config | exclude FastEthernet0/0
Show running-config | section interface

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11
Q

Command: Make configuration persistent across reboot

A

Copy running-config startup-config

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12
Q

Command: Restart Device

A

reload

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13
Q

Command: View running configuration

A

Show running-config

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14
Q

Command: View startup configuration

A

Show startup-config

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15
Q

Command: Copy running configuration to flash memory

A

Copy running-config flash

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16
Q

Command: Change Hostname

A

Hostname X

Where X is new device name

17
Q

Command: Show available interfaces

A

Show ip interface brief

18
Q

Command: Show interface-specific information

A

Show interface Gig0/0

Where Gig0/0 is the interface name

19
Q

Other Cisco Operating Systems

A

NX-OS
Cisco Nexus & MDS data center switch product lines use this

IOS-XR
Runs on the service provider NCS, CRS, ASR9000 & XR12000 series routers

IOS-XE
Runs on the ASR1000 series service provider routers

Commands are nearly identical to IOS

20
Q

Initial Cisco Device Connection

A

Console Cable - DB9 to RJ45

New Console Cable - USB to Mini-USB

21
Q

Console Connection Troubleshooting

A

The console port can be used if the device’s IP addresses become unresponsive

Can be used to troubleshoot the bootup process

You can view the device booting up from a console connection
Not possible with SSH because the system must be already booted

22
Q

Configuration Storage Locations

A

IOS image - Flash

Startup Config - NVRAM

Running Config - RAM
Loaded into RAM from Startup Config when device boots