Add option statistic for conntrack
show conntrack statistic
conntrack -S
vyos@r14# sudo conntrack -S cpu=0 found=0 invalid=0 insert=0 insert_failed=0 drop=0 early_drop=0 error=0 search_restart=4 cpu=1 found=0 invalid=0 insert=0 insert_failed=0 drop=0 early_drop=0 error=0 search_restart=0 cpu=2 found=0 invalid=0 insert=0 insert_failed=0 drop=0 early_drop=0 error=0 search_restart=1 cpu=3 found=0 invalid=0 insert=0 insert_failed=0 drop=0 early_drop=0 error=0 search_restart=13