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MTU-tests: Add README

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Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
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Jesper Dangaard Brouer
2020-10-13 15:37:05 +02:00
parent 4f8b36e569
commit bfc08deedd
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#+OPTIONS: ^:nil
* BPF testing packet size changes
Playing with increasing packet size with TC-BPF. Testing what happens when
sending packets larger that MTU out an interface.
* Notes loading BPF object
How to manually load TC program:
#+begin_src sh
export DEV=mlx5p1
tc qdisc del dev "$DEV" clsact # Also deletes all filters
tc qdisc add dev "$DEV" clsact
tc filter add dev "$DEV" pref 1 handle 1 egress bpf da obj tc_bpf_inc_pkt_size.o
tc filter show dev "$DEV" egress
#+end_src
Be *VERY* careful with =replace= command, it MUST have same =pref= +=handle=:
#+begin_src sh
tc filter replace dev "$DEV" pref 1 handle 1 egress bpf da obj tc_bpf_inc_pkt_size.o
#+end_src