error: Cannot get interface MTU on 'win2019port-le': No such device

admin

忘记设置ovs网卡的MTU值：
5 w# E4 \6 x' O1 Aerror: Cannot get interface MTU on 'win2019port-le': No such device
! B9 E7 f) p- R' I6 F' U% Y; e# B2 Rerror: Failed to start domain instance-00000130
error: Cannot get interface MTU on 'win2019port-le': No such device


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admin

OVS-SETUP

$ m0 e( U- Y0 i  U2 q8 `( j" K1、清除之前的环境
killall ovsdb-server ovs-vswitchd
1 M+ `0 c- F/ Q3 A& [. [rm -f /var/run/openvswitch/vhost-user*
- s# @- ]3 E$ e! g/ m' `0 ]rm -f /etc/openvswitch/conf.db
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2、启动ovsdb

export DB_SOCK=/var/run/openvswitch/db.sock
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: |2 H' b) G/ B* V/ d) W9 t! o/ \ovsdb-tool create /etc/openvswitch/conf.db /usr/share/openvswitch/vswitch.ovsschema
! T+ V. r& [3 ]* }% |3 i0 v  x4 g4 Covsdb-server --remote=punix:$DB_SOCK --remote=db:Open_vSwitch,Open_vSwitch,manager_options --pidfile --detach
' N. Z' K3 t0 q0 ?9 S5 i- Covs-vsctl --no-wait init
ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-lcore-mask=0x2 //绑定到第2个cpu核上
5 z7 p5 ?7 F3 D( r) T: {! n6 \& ^ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-socket-mem=4096
ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-init=true
3 f& W) r) Q3 m' v- |0 q; [启动ovs-vswitch
ovs-vswitchd unix:$DB_SOCK --pidfile --detach --log-file=/var/log/openvswitch/ovs-vswitchd.log
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3、查看支持DPDK是否成功：
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/ I8 v7 z2 O8 c% f: tovs-vsctl get Open_vSwitch . dpdk_initialized
- d3 S+ n) d( R4 Ttrue
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8 a) w3 i# k8 w5 v配置bridge
2 {8 J! {# ~% _4 p7 M5 m1 v1 F1  ovs-vsctl add-br ovsbr0 -- set bridge ovsbr0 datapath_type=netdev
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2、添加vhost-user-client-0/1 端口需要指定vhost-server-path值，表示socket文件路径。
ovs-vsctl add-port ovsbr0 vhost-client-0 -- set Interface vhost-client-0 type=dpdkvhostuserclient options:vhost-server-path=/usr/local/var/run/sock0
# E; V3 n: e+ C  [' ~ovs-vsctl add-port ovsbr0 vhost-client-1 -- set Interface vhost-client-1 type=dpdkvhostuserclient options:vhost-server-path=/usr/local/var/run/sock1
7 J( b6 j1 o. qovs-vsctl show
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7 e  o' n% W4 ?9 K- {8 J, N% S在网桥ovsbr0上绑定真实dpdk的物理网卡

" `- @9 t' g7 m1 X1 T% d  Aovs-vsctl add-port ovsbr0 dpdkport0 -- set Interface dpdkport0 type=dpdk option:dpdk-devargs=0000:02:00.0
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# a$ r9 _6 d( W$ f/ h8 C注：可以修改ovs桥中端口的mtu值方法如下：该命令设置可以在数据库持久，也可以配置物理接口
ovs-vsctl set interface ovsbr0 mtu_request=9000
ovs-vsctl set interface dpdkport0 mtu_request=9000
ovs-vsctl set interface vhost-client-1 mtu_request=9000
ovs-vsctl set interface vhost-client-0 mtu_request=9000
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" s4 O' e( i! K) U该命令清除恢复到默认的MTU

( U- ^7 T; j8 `4 h9 Yovs-vsctl set interface vhost-client-0 mtu_request=[]

也可以直接使用添加端口的时候指定mtu值如下方式：

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ovs-vsctl add-port ovsbr0 vhost-client-0 -- set Interface vhost-client-0 type=dpdkvhostuserclient options:vhost-server-path=/usr/local/var/run/sock0 mtu_request=9000
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$ B, B$ j" K; s( vovs-vsctl add-port ovsbr0 vhost-client-1 -- set Interface vhost-client-1 type=dpdkvhostuserclient options:vhost-server-path=/usr/local/var/run/sock1 mtu_request=9000
ovs-vsctl add-port ovsbr0 dpdkport0 -- set Interface dpdkport0 type=dpdk option:dpdk-devargs=0000:02:00.0 mtu_request=9000
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