Thank you again, I am using a mininet set up (mn --switch user), which I think uses the userspace ovs switch. (Is this assumption right? All available documentation uses wording which gives this impression.)
To confirm this, I also have removed the openvswitch.ko in my VM. But curiously though, ovs-vsctl show doesn't show any topology: *root@cep-VirtualBox:/home/cep# ovs-vsctl show204aa7ac-2ac9-4277-afcf-e7a3f17fc7c1* This is weird because, mininet initializes two hosts (h1, h2) and one OVS switch s1. And the ping all works fine. and to contrast things, I loaded the openvswith.ko (./configure --with-Linux/.... , make install, make modules_install, /sbin/modprobe openvswitch) and ran mininet with the loaded kernel module (sudo mn) *root@cep-VirtualBox:/home/cep# ovs-vsctl show6d14e9f4-de26-4332-93fe-b87e33c532f9 Bridge "s1" Controller "ptcp:6634" Controller "tcp:127.0.0.1:6633 <http://127.0.0.1:6633>" is_connected: true fail_mode: secure Port "s1-eth2" Interface "s1-eth2" Port "s1" Interface "s1" type: internal Port "s1-eth1" Interface "s1-eth1"* Regards Advith On Wed, Oct 19, 2016 at 9:30 AM, Chandran, Sugesh <sugesh.chand...@intel.com > wrote: > > > > > *Regards* > > *_Sugesh* > > > > *From:* Advith Nagappa [mailto:advith.naga...@gmail.com] > *Sent:* Wednesday, October 19, 2016 1:02 AM > *To:* Chandran, Sugesh <sugesh.chand...@intel.com> > *Cc:* discuss@openvswitch.org > *Subject:* Re: [ovs-discuss] OVS - Userspace packet processing > > > > Hello Sugesh, > > > > Thank you for the response. > > > > I am using userspace OVS without DPDK. I do plan to use DPDK at a future > point, but currently am trying to understand the behavior of a pure > userspace ovs switch. > > > > I have put in custom DBG messages in /lib/dpif_netdev. (specifically > dp_netdev_process_rxq_port) but this dbg message doesn't get triggered when > I ping between two hosts connected by a OVS capable switch. > > > > I do see that in this case, the netdev_linux.c module is called, but I > don't know who is calling this module (i.e the entry point to the ovs code > base) > > *[Sugesh]It looks to me you are using kernel interfaces in your setup, > which is not ‘pure’ userspace openvswitch. Can you share the setup details? > What type of interface you used to connect hosts to OVS?* > > > > Any input is appreciated. > > > > Best Regards > > Advith > > > > > > On Tue, Oct 18, 2016 at 10:37 AM, Chandran, Sugesh < > sugesh.chand...@intel.com> wrote: > > > > > > *Regards* > > *_Sugesh* > > > > *From:* discuss [mailto:discuss-boun...@openvswitch.org] *On Behalf Of *Advith > Nagappa > *Sent:* Sunday, October 16, 2016 1:33 AM > *To:* discuss@openvswitch.org > *Subject:* [ovs-discuss] OVS - Userspace packet processing > > > > Hello, > > I am running OVS in userspace (rmmod openvswitch.ko). > > I wanted to the entry point for a packet within the OVS code base. I.e > which module first 'sees' the packet in pure userspace OVS. > > *[Sugesh] [Sugesh] Look at the INSTALL.DPDK.md <http://INSTALL.DPDK.md> > and INSTALL.DPDK-advanced.md <http://INSTALL.DPDK-advanced.md> for the set > up guide.* > > *You can start looking at the lib/dpif-netdev.c. mainly the functions such > as dp_netdev_process_rxq_port, dp_netdev_input etc.* > > > > Best Regards > Advith > > >
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