Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2019:2944
verified on the latest version:ovn2.11-2.11.1-3.el8fdp.x86_64 steps: 1.run test case "regression_bz1695722" manually to send lots of dhcp packets 2.send GARP packets with scapy: from scapy.all import * ip='172.16.{y}.{x}' mac='00:de:ad:01:00:{z}' for i in range(10,99): for j in range(10,99): sendp(Ether(src=mac.format(z=j),dst="ff:ff:ff:ff:ff:ff")/ARP(op=1,hwsrc=mac. format(z=j),hwdst="00:00:00:00:00:00",psrc=ip.format(x=i,y=j),pdst=ip.format(x=i ,y=j)),iface="eth1") cpu usage is not high: [root@dell-per730-19 ~]# top top - 02:52:02 up 4:34, 2 users, load average: 0.40, 0.10, 0.03 Tasks: 500 total, 1 running, 499 sleeping, 0 stopped, 0 zombie %Cpu(s): 3.6/0.8 4[|||| ] MiB Mem : 64065.8 total, 55476.5 free, 2916.3 used, 5673.0 buff/cache MiB Swap: 28560.0 total, 28560.0 free, 0.0 used. 60542.0 avail Mem add filter #1 (ignoring case) as: [!]FLD?VAL PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 5256 qemu 20 0 7322920 912452 20960 S 39.7 1.4 3:00.16 qemu-kvm 4999 openvsw+ 10 -10 2327972 122648 33044 S 9.4 0.2 2:58.87 ovs-vswitchd 5066 root 10 -10 267224 8760 3340 S 4.9 0.0 0:09.46 ovn-controller 4289 root 20 0 1826748 47732 31992 S 4.0 0.1 0:09.94 libvirtd 2440 root 20 0 151192 5316 4068 S 2.2 0.0 0:04.13 sshd 4084 root 20 0 246768 12492 10692 S 2.2 0.0 0:03.05 virsh 5413 qemu 20 0 6315264 588852 21216 S 2.2 0.9 1:52.25 qemu-kvm 4399 root 20 0 64268 5172 3920 R 0.9 0.0 1:05.78 top