This example demonstrates how to write a simple eBPF Qdisc classifier
that classifies flows depending on their destination TCP port. The
example script, runner.sh shows how you can use the eBPF Qdisc
classifier and implement the same functionality using u32. The script
creates two network namespaces called Left and Right, representing two
different hosts. The script then illustrates the classifiers in action
using iperf3 by starting clients on the Left namespace that connect to
iperf3 servers on the Right namespace. The Qdisc classifiers give TCP
ports 8080 and 8081 a high rate limit, while TCP port 8082 represents
all other traffic capped at 20 Mbps.
Signed-off-by: Frey Alfredsson <freysteinn@freysteinn.com>
