By default this tool test bandwidth between two pods on the same node. and if a second node is passed to the script the bandwith between the two nodes is also tested
Find some nodes
oc get nodes
NAME STATUS ROLES AGE VERSION
master0-49 Ready master 15d v1.22.1+d8c4430
master1-49 Ready master 15d v1.22.1+d8c4430
master2-49 Ready master 15d v1.22.1+d8c4430
worker0-49 Ready worker 15d v1.22.1+d8c4430
worker1-49 Ready worker 15d v1.22.1+d8c4430
worker2-49 Ready worker 15d v1.22.1+d8c4430
./run 4|6 NODE1 [NODE2]
Runs on a single node.
using ipv4 addresses
./run 4 worker0-49
Using ipv6 addresses
./run 6 worker0-49
Runs on two nodes, then between the nodes
./run 4 worker0-49 worker1-49