provoke a forwarding loop / broadcast storm

storm-test | mesh-no-stp | mesh-no-stp-lesser

architecture

esw1 fa0/0  --  esw2 fa0/0
esw1 fa0/1  --  esw2 fa0/1

esw1 fa0/5  --  PC1
esw2 fa0/5  --  PC2

cli setup

(config)
no banner exec
no spanning-tree vlan 1

make sure the links between the switchen and VPCS are up –and– the redundant links between the switchen are up

(exec)
show interfaces status

eventually fix if they are down – no IP settings are required here (we’re just L2)

(config)
int range fa1/0 - 1
shutdown
no shutdown

(config)
int range fa1/5
shutdown
no shutdown

leaf-nodes (vpcs)

node1

ip address 10.5.5.1 255.255.255.0
save

node2

ip address 10.5.5.2 255.255.255.0
save

acceptance

sniff one link between ESW1 and ESW2

from node2

ping 10.5.5.1 -c1

==> you will see ARP packets going wild