Hi,
While labbing, you can often verify the results of your configuration by using show commands e.g. while studying OSPF or BGP, you can use show commands to examine the RIB and FIB.
But not always.
One area where
you need to send actual traffic is multicast. You need a way to send IGMP (or MLD) join/leave messages to verify multicast group membership.
And send multicast data traffic to verify packet replication and multicast tree pruning.
Ostinato helps you do both. Check our blog for details -
Multicast GuidesSrivats (Founder, Ostinato)