Regards _Sugesh
From: discuss [mailto:discuss-boun...@openvswitch.org] On Behalf Of zhi Sent: Thursday, October 13, 2016 11:29 AM To: discuss@openvswitch.org Subject: [ovs-discuss] VXLAN doesn't work in OVS-DPDK hi, all I configured native tunneling by this guide[1]. And follow this guide[2] to install OVS-DPDK. The OVS version is 2.6.0. The DPDK version is dpdk-16.07. My local Linux environment is CentOS 7.1.1503 and the kernel version is 3.10.0-327.el7.x86_64. And the network topology shows below: [内嵌图片 1] And the OVS info shows : [root@host172 ~]# ovs-vsctl show 73e0a3b7-22b6-4c24-8d05-1f9810cc06a4 Bridge br-int fail_mode: standalone Port "vxlan-001" Interface "vxlan-001" type: vxlan options: {local_ip="10.0.109.172", remote_ip="10.0.109.173"} Port "vm_port0" Interface "vm_port0" type: dpdkvhostuser Port br-int Interface br-int type: internal Bridge "br-phy1" fail_mode: standalone Port "dpdk0" Interface "dpdk0" type: dpdk Port "br-phy1" Interface "br-phy1" type: internal [root@host172 ~]# ip a |grep br-phy1 78: br-phy1: <BROADCAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 500 inet 10.0.109.172/24<http://10.0.109.172/24> scope global br-phy1 [root@host172 src]# ovs-ofctl dump-flows br-phy1 NXST_FLOW reply (xid=0x4): cookie=0x0, duration=6031.989s, table=0, n_packets=416732693, n_bytes=42512875415, idle_age=0, actions=NORMAL [root@host172 src]# ovs-ofctl dump-flows br-int NXST_FLOW reply (xid=0x4): cookie=0x0, duration=5429.701s, table=0, n_packets=0, n_bytes=0, idle_age=5429, actions=NORMAL Here is the problem! Why is there no matched packets and bytes in OVS bridge br-int ? How does the bridge br-int receive VXLAN packets? As far as I know, physical nic "eth1" is handled by DPDK. I add a dpdk0 port ( represent the physical nic "eth1" ) into OVS bridge br-phy1. And there is a vxlan port named "vxlan-001" in OVS bridge br-int. So the OVS bridge br-int can receive the vxlan packets from br-phy1 by linux kernel stack. Does my thought right? If yes, why does the bridge br-int can not receive any packets? [Sugesh] Native tunneling doesn’t use any kernel stack for the packet forwarding. Everything happening at the userspace. Have you checked the tunnel arp and route entries? Its mentioned in the debug section of the same document. Did you try generating traffic from the VM ?? Please have a look at the statistics at the datapath as well. You can use the command ovs-appctl dpctl/show –s netdev@ovs-netdev BTW, I can not see any packet changes by using " ifconfig br-phy1 |grep 'RX packets' " when I add the IP "10.0.109.172" into bridge br-phy1. And I can see the packet changes when I remove the IP address from bridge br-phy1. Could someone tell me the reason? Thanks Zhi Chang [1]. http://openvswitch.org/support/config-cookbooks/userspace-tunneling/ [2]. https://github.com/openvswitch/ovs/blob/master/INSTALL.DPDK.md
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