CloudLabBox
Try the free demo

Cisco NX-OS data centre lab 4 of 15

PIM sparse mode and multicast flow

Carry a real multicast stream through a Nexus switch with PIM sparse mode: a rendezvous point, a shared tree, the switch to the shortest path, and a source-specific group that needs no RP at all.

Run this lab

It needs Lite: its 4 nodes are set to 5 vCPU and 7,680 MB in total. That fits the free demo too.

In your workspace: Shared, then Cisco Nexus NX-OS data centre guided labs, then 04 - PIM sparse mode and multicast flow

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
Advanced
Time
About 70 minutes
Nodes need
5 vCPU, 7,680 MB
Smallest plan
Lite

The scenario

A tenant in hall 3 streams market data from a server to several sites, and it's far too much to send by unicast to each one. You'll make N1 carry it by multicast. H1 stands in for the server. R2's loopback10 stands in for a receiver: it has joined both groups and replies to pings sent to them, which gives you an end-to-end test. R1 is the rendezvous point (RP). OSPF is already running, and R1 and R2 already run PIM.

ItemValue
SourceH1, 10.10.10.11 in VLAN 10, gateway .1
Any-source group239.1.1.1, through RP 10.255.0.11 (R1 loopback0)
Source-specific group232.1.1.1 from 10.10.10.11, no RP
ReceiverR2 loopback10, 10.60.1.1
N1 interfaces for PIMloopback0, Ethernet1/1, Ethernet1/2, Vlan10

What you’ll practise

  • Enable PIM sparse mode on routed ports and SVIs
  • Point a switch at a static rendezvous point
  • Read (*,G) and (S,G) state, and follow the incoming and outgoing interfaces
  • Explain the RPF check and read it for a source
  • Run a source-specific group, and read IGMP state on a VLAN

The tasks

  1. Start the lab
  2. PIM on N1
  3. The rendezvous point and the shared tree
  4. Start the source
  5. The RPF check
  6. A source-specific group
  7. IGMP on the VLAN

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 PIM sparse mode and multicast flow4 nodes, 3 links. Every link is listed as text below the diagram.N1R1R2H1e5eth0e1Gi0/0e2Gi0/0
4 nodes, with the interface names each link uses.
Every link, as text
  • N1 e1 to R1 Gi0/0
  • N1 e2 to R2 Gi0/0
  • N1 e5 to H1 eth0
Nodes in PIM sparse mode and multicast flow, with the image each runs and the vCPU and RAM it’s set to
NodeDeviceImage in Add NodeSet to
N1Cisco Nexus 9000vnxosv9k-9300v-9.3.102 vCPU, 6,144 MB
R1Cisco IOSvvios-adventerprisek9-m.SPA.159-3.M61 vCPU, 512 MB
R2Cisco IOSvvios-adventerprisek9-m.SPA.159-3.M61 vCPU, 512 MB
H1Alpine Linuxclbalpinebase-alpine-base-3-20-31 vCPU, 512 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 Cisco Nexus NX-OS data centre guided labs.

  3. Open 04 - PIM sparse mode and multicast flow 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 Cisco NX-OS data centre labs

All Cisco NX-OS data centre labs

Related labs in other courses

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.