[ovs-dev] Rate limit the packet-in messages .

deepaksingh 555deepaksingh at gmail.com
Tue Jul 21 04:38:56 UTC 2015


Hi,
I am using openvswitch-2.0.0 ovs.
1. Have Switch connected to OF controller.
2. Node is connected.
3. Run iperf command from node to trigger a lot of packet-in.
"iperf -c <ip> -t 10000 -u -b 1000MB -l 466" where <ip> has static arp
configured.
4. After >1hr. Switch disconnect from OF controller.
5. Check ping to SDN Controller observe that ping is reachable.
6. Stop all traffic and observe that connection is not restore

[Root cause]
CPU usage for openvswitchd is more then 52% (Check
/var/log/openvswitchd.log or ps -aux)

Note:
Reboot is required to recover the Switch
WLC is able to send packet-in rate of 4000-7000 pps (64,512,1500 bytes).
This is the reason affecting WLC CPU. packet-in rate may need to
rate-limited to protect the CPU, excess rate (non-LLDP) should be dropped
...........................
Could we stop this problem somewhere from ovs code ?

-- 
Thanks & Regards,



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