The router in this level responds to a special type of ping, called a "Broadcast ping". When a router receives a packet that is addressed to the broadcast address, it replicates it and sends it to all the machines on the network.
In this level, Eve's computer has received an upgrade: it can no longer be DoS'd from a single computer. Multiple computers will be required to coordinate with each other in order to send her enough traffic.
However, you only have control of a single computer! You will have to implement a smurf attack. In a smurf attack, you leverage other devices to send traffic for you.
Experiment with sending broadcast pings by sending a message with the dstip set to "Broadcast". See if you can overwhelm Eve by combining this with what you learned about spoofing packet source addresses.