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JNCIS-SP lab 7 of 16

Spanning tree from RSTP to VSTP with protection

Close a ring of bridges safely with RSTP, choose the root, watch an alternate take over, test all three protections, then give each VLAN its own tree with MSTP and VSTP.

Run this lab

It needs Standard: its 3 nodes are set to 12 vCPU and 15,360 MB in total.

In your workspace: Shared, then JNCIS-SP JN0-364 guided labs, then 07 - Spanning tree from RSTP to VSTP with protection

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 12 vCPU and 15,360 MB together. Every lab plan includes every guided lab.

Level
Intermediate
Time
About 100 minutes
Nodes need
12 vCPU, 15,360 MB
Smallest plan
Standard

The scenario

Three Skerry aggregation routers bridge VLANs 100 and 200 between them. The links S1 to S2 and S1 to S3 are trunks already. The link S2 to S3 would close a loop, so it isn't configured yet: Ethernet has no TTL, so a loop would flood forever. You'll turn on spanning tree first, then close the ring.

SwitchPortToNotes
S1ge-0/0/0, ge-0/0/1S2, S3Trunks for VLANs 100 and 200
S2ge-0/0/0S1Trunk
S2ge-0/0/1S3Not configured yet
S3ge-0/0/0S1Trunk
S3ge-0/0/1S2Not configured yet

Each router has irb.100 192.168.100.N/24 and irb.200 192.168.200.N/24, where N is its number, so you can test the bridges with ping.

What you’ll practise

  • Read port roles and states and explain RSTP convergence
  • Choose a root and backup with bridge priority
  • Apply BPDU, root and loop protection and read the results
  • Configure MSTP regions and instances
  • Configure VSTP per VLAN

The tasks

  1. RSTP, then close the ring
  2. Choose the root and test convergence
  3. BPDU, root and loop protection
  4. MSTP
  5. VSTP

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 Spanning tree from RSTP to VSTP with protection3 nodes, 3 links. Every link is listed as text below the diagram.S1S2S3ge-0/0/0ge-0/0/0ge-0/0/1ge-0/0/0ge-0/0/1ge-0/0/1
3 nodes, with the interface names each link uses. On a narrow screen, scroll the diagram sideways.
Every link, as text
  • S1 ge-0/0/0 to S2 ge-0/0/0
  • S1 ge-0/0/1 to S3 ge-0/0/0
  • S2 ge-0/0/1 to S3 ge-0/0/1
Nodes in Spanning tree from RSTP to VSTP with protection, with the image each runs and the vCPU and RAM it’s set to
NodeDeviceImage in Add NodeSet to
S1Juniper vJunos-routervjunosrouter-24.2R1-S2.54 vCPU, 5,120 MB
S2Juniper vJunos-routervjunosrouter-24.2R1-S2.54 vCPU, 5,120 MB
S3Juniper 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 JNCIS-SP JN0-364 guided labs.

  3. Open 07 - Spanning tree from RSTP to VSTP with protection 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 JNCIS-SP labs

All JNCIS-SP labs

Related labs in other courses

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