tag:blogger.com,1999:blog-6431746400497756040.post6577134967854402417..comments2023-02-14T23:24:39.195+00:00Comments on Eran Gampel Blog : DragonFlow SDN based Distributed Virtual Router for OpenStack NeutronEran Gampelhttp://www.blogger.com/profile/03346930681002907532noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-6431746400497756040.post-63054384233130136402015-12-26T21:39:19.614+00:002015-12-26T21:39:19.614+00:00We are currently using this flow module(first pack...We are currently using this flow module(first packet path establishment ) with a distributed SDN architecture in Dragonflow, so the controller is handling ONLY traffic from the local hosted VMs/containers.<br />The latency is only to the user space of local Dragonflow controller.<br />From our tests until now the added latency to the local controller the is minimal considering that OVS in anyway use slow path between the kernel space and user space for first packet. <br />The load on the controller is minimal as we are handling only locally hosted VMs and only first packet path establishment between two L3 connected VMsEran Gampelhttps://www.blogger.com/profile/03346930681002907532noreply@blogger.comtag:blogger.com,1999:blog-6431746400497756040.post-89194010304674947102015-12-25T07:30:42.907+00:002015-12-25T07:30:42.907+00:00Nice article! What is latency of the first packet ...Nice article! What is latency of the first packet of the new flow? Will the latency increase while dragonflow controller is very busy?Anonymoushttps://www.blogger.com/profile/11822365586075601080noreply@blogger.comtag:blogger.com,1999:blog-6431746400497756040.post-69348992636020284642015-12-25T07:28:49.314+00:002015-12-25T07:28:49.314+00:00Nice article, what's the latency of the first ...Nice article, what's the latency of the first packet? Does the latency increase when the dragonflow controller is very busy?Anonymoushttps://www.blogger.com/profile/11822365586075601080noreply@blogger.comtag:blogger.com,1999:blog-6431746400497756040.post-30904921097356584812015-10-23T06:48:43.745+01:002015-10-23T06:48:43.745+01:00This is handled by the L3 Forwarding flow (OpenFlo...This is handled by the L3 Forwarding flow (OpenFlow ) installed reactively on the first VM-to-VM communication.<br />This flow will do the following (all standard OpenFlow actions) <br />1) Change the source MAC to the virtual router port MAC <br />2) Change the destination MAC to to the target VM MAC address <br />3) Decrease TTL by one <br />4) Change the segmentation ID to the destination Subnet segmentation ID<br />You can find more details in this slide http://www.slideshare.net/gampel/dragonflow-sdn-based-distributed-virtual-router-for-openstack-neutron.<br /> Eran Gampelhttps://www.blogger.com/profile/03346930681002907532noreply@blogger.comtag:blogger.com,1999:blog-6431746400497756040.post-6807959041964045222015-10-23T03:45:07.050+01:002015-10-23T03:45:07.050+01:00but how was TTL be handled?but how was TTL be handled?Anonymousnoreply@blogger.com