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CCNP Service Provider lab 2 of 23

IS-IS levels, wide metrics and IPv6 topologies

Build a two-area IS-IS network on IOS XR. Plan NETs and levels, use wide metrics, run IPv6 in its own topology, steer traffic with metrics, and leak loopbacks from Level 2 into Level 1.

Run this lab

It needs Standard: its 4 nodes are set to 4 vCPU and 10,240 MB in total.

In your workspace: Shared, then CCNP Service Provider guided labs, then 02 - IS-IS levels wide metrics and IPv6 topologies

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 4 vCPU and 10,240 MB together. Every lab plan includes every guided lab.

Level
Intermediate
Time
About 75 minutes
Nodes need
4 vCPU, 10,240 MB
Smallest plan
Standard

The scenario

Fellgate Carrier is building its core on IS-IS. It's what most large providers run, because it carries IPv4, IPv6 and everything segment routing adds later without needing a new protocol, and it doesn't depend on IP to form adjacencies.

Fellgate has two regions. R1 and R2 are in the north, area 49.0001. R3 and R4 are in the south, area 49.0002. R2 and R3 form the backbone and have two links between them: a main link, and a backup that should carry traffic only if the main one fails. All the interfaces are addressed and up, and no routing protocol is running.

DeviceInterfaceAddressConnects to
R1Loopback010.255.0.1/32, 2001:db8:255::1/128
R1Gi0/0/0/010.0.12.1/30, 2001:db8:0:12::1/64R2 Gi0/0/0/0
R2Loopback010.255.0.2/32, 2001:db8:255::2/128
R2Gi0/0/0/010.0.12.2/30, 2001:db8:0:12::2/64R1 Gi0/0/0/0
R2Gi0/0/0/110.0.23.1/30, 2001:db8:0:23::1/64R3 Gi0/0/0/0
R2Gi0/0/0/210.0.230.1/30, 2001:db8:0:230::1/64R3 Gi0/0/0/2
R3Loopback010.255.0.3/32, 2001:db8:255::3/128
R3Gi0/0/0/010.0.23.2/30, 2001:db8:0:23::2/64R2 Gi0/0/0/1
R3Gi0/0/0/210.0.230.2/30, 2001:db8:0:230::2/64R2 Gi0/0/0/2
R3Gi0/0/0/110.0.34.1/30, 2001:db8:0:34::1/64R4 Gi0/0/0/0
R4Loopback010.255.0.4/32, 2001:db8:255::4/128
R4Gi0/0/0/010.0.34.2/30, 2001:db8:0:34::2/64R3 Gi0/0/0/1

What you’ll practise

  • Read and write an IS-IS NET
  • Configure Level 1, Level 2 and Level 1-2 routers on IOS XR
  • Explain the ATT bit and the default route it creates
  • Run IPv6 in a separate topology and find it in the database
  • Set per-address-family metrics
  • Leak prefixes from Level 2 into Level 1 with a route policy

The tasks

  1. Plan the addresses and levels
  2. Read what the protocol built
  3. Add IPv6, in its own topology
  4. Make the backup a backup
  5. Let the area see the loopbacks

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 IS-IS levels wide metrics and IPv6 topologies4 nodes, 4 links. Every link is listed as text below the diagram.R1R2R3R4Gi0/0/0/0Gi0/0/0/0Gi0/0/0/1Gi0/0/0/0Gi0/0/0/1Gi0/0/0/0Gi0/0/0/2Gi0/0/0/2
4 nodes, with the interface names each link uses. On a narrow screen, scroll the diagram sideways.
Every link, as text
  • R1 Gi0/0/0/0 to R2 Gi0/0/0/0
  • R2 Gi0/0/0/1 to R3 Gi0/0/0/0
  • R2 Gi0/0/0/2 to R3 Gi0/0/0/2
  • R3 Gi0/0/0/1 to R4 Gi0/0/0/0
Nodes in IS-IS levels, wide metrics and IPv6 topologies, with the image each runs and the vCPU and RAM it’s set to
NodeDeviceImage in Add NodeSet to
R1Cisco IOS XRvxrv-k9-demo-6.3.11 vCPU, 2,560 MB
R2Cisco IOS XRvxrv-k9-demo-6.3.11 vCPU, 2,560 MB
R3Cisco IOS XRvxrv-k9-demo-6.3.11 vCPU, 2,560 MB
R4Cisco IOS XRvxrv-k9-demo-6.3.11 vCPU, 2,560 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 CCNP Service Provider guided labs.

  3. Open 02 - IS-IS levels wide metrics and IPv6 topologies 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 Cisco. The lab follows exam topics and isn’t vendor training material; vendor names identify the exams and the images in the workspace.