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JNCIA-Junos lab 13 of 15

Maintenance and root password recovery

Look inside a Junos router (Routing Engine, Packet Forwarding Engine and the daemons that run them), check storage before an upgrade, walk through the upgrade procedure, schedule and cancel a reboot, and recover a forgotten root password from the boot menu.

Run this lab

It needs Lite: its 1 node is set to 4 vCPU and 5,120 MB in total. That fits the free demo too.

In your workspace: Shared, then JNCIA-Junos JN0-106 guided labs, then 13 - Maintenance and root password recovery

Try it free for 30 minutesRun it on Lite from £3 a day

The free demo needs no card and no email. Every lab plan includes every guided lab.

Level
Intermediate
Time
About 50 minutes
Nodes need
4 vCPU, 5,120 MB
Smallest plan
Lite

The scenario

Ashby Freight's HQ router is due for a maintenance window: a software upgrade next month, a reboot plan, and a test of the emergency procedure for a lost root password. Before you change anything you want to understand what you are maintaining.

What you’ll practise

  • Describe the Junos software architecture: FreeBSD kernel, separate daemons, Routing Engine and Packet Forwarding Engine
  • Read the chassis, Routing Engine and FPC status
  • Check and clean up storage and manage files before an upgrade
  • Explain how Junos release names work and the steps of a software upgrade
  • Schedule, check and cancel a reboot, and know what halt and power-off do
  • Recover the root password from the boot menu

The tasks

  1. What is running inside Junos
  2. Storage and files
  3. The upgrade procedure
  4. Reboot, halt and power-off
  5. Recover the root password (optional, guided)

The Lab Tasks pane has the scenario, these tasks, the checks to run, hints and the full solution.

Topology and devices

The network as it opens in EVE-NG, drawn from the lab’s own canvas, and the image each node runs.

Topology of Maintenance and root password recovery1 node and 1 network, 1 link. Every link is listed as text below the diagram.HQHQ-LANge-0/0/2
1 node and 1 network, with the interface names each link uses.
Every link, as text
  • HQ ge-0/0/2 to HQ-LAN (network)
Nodes in Maintenance and root password recovery, with the image each runs and the vCPU and RAM it’s set to
NodeDeviceImage in Add NodeSet to
HQJuniper vJunos-routervjunosrouter-24.2R1-S2.54 vCPU, 5,120 MB

How to open this lab

  1. Sign in to your workspace at lab.cloudlabbox.com.

  2. In File Manager, open Shared, then the folder JNCIA-Junos JN0-106 guided labs.

  3. Open 13 - Maintenance and root password recovery and start its nodes, then open Lab Tasks for the scenario and the steps.

The lab is read-only. You can start the nodes and configure the devices, but changes to the topology can’t be saved. To change it, rebuild it in your own folder.

More JNCIA-Junos labs

All JNCIA-Junos labs

CloudLabBox is independent of Juniper Networks. The lab follows exam topics and isn’t vendor training material; vendor names identify the exams and the images in the workspace.