Since all of the packets are getting output, there's no actual problem. The flows in the datapath flow table are an implementation detail. It's not a concern that fewer than 2000 flows are getting added to the datapath.
On Wed, Nov 26, 2014 at 09:17:51AM +0000, Chetan Bali wrote: > Hi Ben, > > I am adding 2000 flows and sending traffic for all the 2000 flows. When 1 > packet per flow is send ,I am getting all the 2000 packets at the output > interface. > > From the logs,I can see that 2000 flows are getting added at the ovs, but > the problem is that ovs is sending add flow request to datapath [ > openvswitch.ko ] for only 1251 packets at a time, and only 1250 flows are > added at the datapath for burst traffic. > > I have taken the output of dump-flow command for ovs and datapath. > > Flows count at ovs-ofctl: > ovs-ofctl dump-flows br0 | wc -l > 2000 > > Flows count at datapath [ ovs-dpctl ]: > ovs-dpctl dump-flows | wc -l > 1251 > > It is showing that entries for only 1251 flows is added in datapath table. > > 1st flow of ovs-ofctl: > > cookie=0x0, duration=35.037s, table=0, n_packets=0, n_bytes=0, idle_age=35, > ip,in_port=1,dl_src=aa:bb:cc:44:44:44,dl_dst=55:55:55:55:55:55,nw_src=10.0.0.1,nw_dst=11.0.0.1 > actions=output:2 > > we increment dl_src, dl_dst, nw_src, nw_dst by 1 and try to add 2K flows like > this. > > Thanks > Chetan Bali > > -----Original Message----- > From: Ben Pfaff [mailto:b...@nicira.com] > Sent: 25 November 2014 21:12 > To: Chetan Bali > Cc: discuss@openvswitch.org > Subject: Re: [ovs-discuss] Limit on num of flows in ovs 2.0 > > On Tue, Nov 25, 2014 at 09:41:19AM +0000, Chetan Bali wrote: > > I have a query related to max number of flows added using ovs-ofctl on > > a single ovs bridge. We are trying to find the max limit of ovs flows. > > > > When we add the flows using ovs-ofctl, we are able to add 2000 flows > > from the ovs clis. But when we send the traffic for 2K flows, only > > ~1250 flows gets added but still we receive the packet outs for 2K > > flows. > > > > Is there any hard limit on number of flows been added at dpif linux > > class? > > There is no hard limit to the OpenFlow flow table. We routinely run with > hundreds of thousands of flows. I'm confused--you imply that many of the > flows you add don't really get added, but that doesn't make any sense. Can > you explain further? > "DISCLAIMER: This message is proprietary to Aricent and is intended solely > for the use of the individual to whom it is addressed. It may contain > privileged or confidential information and should not be circulated or used > for any purpose other than for what it is intended. If you have received this > message in error, please notify the originator immediately. If you are not > the intended recipient, you are notified that you are strictly prohibited > from using, copying, altering, or disclosing the contents of this message. > Aricent accepts no responsibility for loss or damage arising from the use of > the information transmitted by this email including damage from virus." _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
