I was reading about flowspec the other day. It has been around for a while now however it was on the news just recently due to the Internet outage caused by L3.
Apparently, a rule send by a flowspec controller was misconfigured and took down several BGP peers which in return took other BGP peers to L3 and you already know what happened.
Thus I decided to show a lab that implements flow spec for both IPV4 and IPV6.
Here we go.