Hi Pablo, Florian, On Thu, Feb 10, 2022 at 11:32:05AM +0800, Hangbin Liu wrote: > +ip netns exec ${nsrouter} sysctl net.ipv4.conf.veth0.rp_filter=0 > /dev/null > +ip netns exec ${nsrouter} sysctl net.ipv4.conf.veth1.rp_filter=0 > /dev/null Oh, disable rp_filter on veth0 is enough for the current testing. But for the format and maybe a preparation for future testing. Disable veth1 rp_filter should also be OK. If you think there is no need to do this on veth1. I can send a v2 patch. Thanks Hangbin