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JNCIA-Junos lab 4 of 15

Interfaces and logical units

Connect HQ to the new depot over two links: a plain routed link with IPv4 and IPv6, and a VLAN-tagged link that carries two logical interfaces. Along the way you read interface names, check ARP and IPv6 neighbours, find the real MTU, disable a port and read the error counters.

Run this lab

It needs Standard: its 2 nodes are set to 8 vCPU and 10,240 MB in total.

In your workspace: Shared, then JNCIA-Junos JN0-106 guided labs, then 04 - Interfaces and logical units

Run it on Standard from £5 a day

The free demo can’t run it: it has 6 vCPU and 8 GB, and this lab’s nodes need 8 vCPU and 10,240 MB together. Every lab plan includes every guided lab.

Level
Beginner
Time
About 55 minutes
Nodes need
8 vCPU, 10,240 MB
Smallest plan
Standard

The scenario

The depot is now cabled to HQ with two links. The first (ge-0/0/0) is the main routed link. The second (ge-0/0/1) must carry two separate services, CCTV and voice, kept apart with VLAN tags. HQ is the .1 end of every link and DEPOT the .2 end.

LinkHQDEPOT
ge-0/0/0 (untagged)172.16.14.1/30, 2001:db8:14::1/64172.16.14.2/30, 2001:db8:14::2/64
ge-0/0/1 unit 10, VLAN 10 (CCTV)172.16.10.1/30172.16.10.2/30
ge-0/0/1 unit 20, VLAN 20 (Voice)172.16.20.1/30172.16.20.2/30

What you’ll practise

  • Decode Junos interface names and tell physical from logical interfaces
  • Configure IPv4 and IPv6 on logical units and test them with ping
  • Read the ARP table and the IPv6 neighbour table
  • Carry several logical units over one port with vlan-tagging and vlan-id
  • Explain physical MTU versus protocol MTU and prove the limit with do-not-fragment pings
  • Disable an interface, and read and clear interface statistics and errors

The tasks

  1. Read interface names
  2. Address the routed link with IPv4 and IPv6
  3. Carry two VLANs over one port
  4. Find the real MTU
  5. Disable a port
  6. Statistics and errors

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 Interfaces and logical units2 nodes and 2 networks, 4 links. Every link is listed as text below the diagram.HQDEPOTOffice-LANDepot-LANge-0/0/2ge-0/0/2ge-0/0/0ge-0/0/0ge-0/0/1ge-0/0/1
2 nodes and 2 networks, with the interface names each link uses. On a narrow screen, scroll the diagram sideways.
Every link, as text
  • HQ ge-0/0/0 to DEPOT ge-0/0/0
  • HQ ge-0/0/1 to DEPOT ge-0/0/1
  • HQ ge-0/0/2 to Office-LAN (network)
  • DEPOT ge-0/0/2 to Depot-LAN (network)
Nodes in Interfaces and logical units, 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
DEPOTJuniper 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 04 - Interfaces and logical units 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.

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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.