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vNX-OS [N7K] installation (Step by Step)

Let’s drive from VirtualBox * Cisco Nexus vNX-OS and work with GNS3

1. Cisco vNX-OS Introduction

> Simulation of the Cisco Nexus devices are the ‘Titanium’ is included in the VIRL version 7.X as properly introduced

2. Cisco vIOS Availability:

A. Extract from Cisco VIRL: Cisco VIRL is paid because somehow the purchase of a personal level is a bit obviously very difficult http://virl-dev-innovate.cisco.com/

B. Google

3. vNX-OS[N7K] drive to VM VirtualBox

> Test environment: VM VirtualBox

> VNX-OS Image: Used 7.X versions extracted from the Cisco VIRL – N7K.vmdk

4. VM creation in VirtualBox

> New VM – OS (Linux, Other 64.bit),

> Name (vNX-oS),

> CPU (1),

> RAM (2G – 4G),

> Disk (existing presence, N7K.vmdk selection, Convert)

> VNX-OS MgMt virtual serial port settings for access control (Serial Port) – named pipe: //./pipe/vNX-OS

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Configuring Cisco Banners

Lab Prerequisites:

  • If you are using GNS3 than load the Stub Area Networking GNS3 topology file than start R1.
  • Establish a Console session with Router 1.

Lab Objectives:

  • Configure a login banner so that any attempted connections to the device are prompted with Legal information.
  • Configure an EXEC banner so that when a user establishes an exec session with the device the device displays the hostname and current line the session was established on.
  • Configure a Message of The Day (MOTD) Banner to display current scheduled downtime for device maintenance.

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Recovering IOS on a Catalyst Switch

Lab Prerequisites:

  • This lab will require a REAL switch as this lab cannot be emulated using GNS3.
  • The Cisco IOS on the switch must be corrupt or missing to perform this lab, to emulate this error you can erase the flash memory to practice this lab.
  • An active console session to the device is REQUIRED.
  • You’ll need to use either HyperTerminal or SecureCRT as Putty does not support xModem.

Lab Objectives:

  • Boot the switch into SWITCH ROM mode.
  • Initialize the flash file system.
  • OPTIONAL – Format the flash file system if needed. (This will remove your startup configuration)
  • Set the baud rate to 115200 to increase xmodem transfer speed and decrease time required to restore the IOS Image.
  • Copy the Cisco IOS Image via xModem to Flash:
  • Set the boot parameter to the new image name located in Flash:
  • Unset the baud so that it defaults back to 9600.
  • Boot the switch and verify that the switch boots properly.

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Recovering IOS on a 2600 Series

Lab Prerequisites:

  • You’ll need a Cisco 2600 Series router or greater that has a corrupt Cisco IOS image or NO IOS image at all. If you wish to simulate this lab you can erase the flash on your device and reboot. Please note that you’ll need to backup the Cisco IOS image prior to erasing it unless you have another image on hand that you wish to load onto the device.
  • A console connection to the device is REQUIRED
  • You’ll need a TFTP server installed on your PC to restore the image.

Lab Objectives:

  • Boot the Cisco router into ROM mode by breaking the boot sequence using the keystroke CTRL + Pause Break
  • Set the TFTPDNLD variables required to execute the procedure which include IP Address, Subnet Mask, Default Gateway, TFTP Server, TFTP Image name.
  • Execute the TFTPDNLD command and load the image into RAM using the -r switch.
  • Once booted into Cisco IOS, configure a router so that you may copy a Cisco IOS image from a TFTP server to Flash.
  • Once all necessary configuration is done copy the IOS image from the TFTP server to the flash.
  • After the copy has completed, reboot the router and verify that the image boots successfully.

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Recovering IOS on a 2500 Series

Lab Prerequisites:

  • You’ll need a Cisco 2500 Series router that has a corrupt image or NO IOS image at all. If you wish to simulate this lab you can erase the flash on your device and reboot. Please note that you’ll need to backup the Cisco IOS image prior to erasing it unless you have another image on hand that you wish to load onto the device.
  • A console connection to the device is REQUIRED.
  • You’ll need a TFTP server installed on your PC to restore the image.

Lab Objectives:

  • Boot the Cisco router into ROM mode by breaking the boot sequence using the keystroke CTRL+Pause Break
  • Change the configuration register to boot the ROM(BOOT) image. Configuration register to be used is 0x2141
  • Initialize the router by issuing the  i  command
  • Assign an IP address to the ethernet interface and configure a default gateway (if required)
  • Copy the Cisco IOS image from the TFTP server into flash memory.
  • Change the configuration register back to its default value and reload the device to ensure that the device boots up properly with the restored IOS image.

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