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

admin

忘记设置ovs网卡的MTU值：
! l% Y% c; X0 X, D: Werror: Cannot get interface MTU on 'win2019port-le': No such device
" F* c/ ^$ Q" d6 A1 T" f1 W  D  y# merror: Failed to start domain instance-00000130
error: Cannot get interface MTU on 'win2019port-le': No such device

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admin

OVS-SETUP
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, w/ \; P8 v% F0 r+ \1、清除之前的环境
- b' `, t3 x) Mkillall ovsdb-server ovs-vswitchd
: p0 \- ^" f1 ?( \: m8 Rrm -f /var/run/openvswitch/vhost-user*
2 N: k# U' ?9 Z1 Qrm -f /etc/openvswitch/conf.db
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2、启动ovsdb

; C0 o3 O6 f- |& D( _export DB_SOCK=/var/run/openvswitch/db.sock

ovsdb-tool create /etc/openvswitch/conf.db /usr/share/openvswitch/vswitch.ovsschema
ovsdb-server --remote=punix:$DB_SOCK --remote=db:Open_vSwitch,Open_vSwitch,manager_options --pidfile --detach
ovs-vsctl --no-wait init
ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-lcore-mask=0x2 //绑定到第2个cpu核上
ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-socket-mem=4096
* K" Z* b1 k2 }0 Movs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-init=true
启动ovs-vswitch
ovs-vswitchd unix:$DB_SOCK --pidfile --detach --log-file=/var/log/openvswitch/ovs-vswitchd.log

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7 y% h9 ^9 o% I" u$ ^* Q% `; u3、查看支持DPDK是否成功：
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ovs-vsctl get Open_vSwitch . dpdk_initialized
true

配置bridge
1  ovs-vsctl add-br ovsbr0 -- set bridge ovsbr0 datapath_type=netdev
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" A, a% _+ `' }6 [" ]" m7 Y2、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
2 q; w$ F: U: F6 l6 A2 Yovs-vsctl add-port ovsbr0 vhost-client-1 -- set Interface vhost-client-1 type=dpdkvhostuserclient options:vhost-server-path=/usr/local/var/run/sock1
ovs-vsctl show

在网桥ovsbr0上绑定真实dpdk的物理网卡
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ovs-vsctl add-port ovsbr0 dpdkport0 -- set Interface dpdkport0 type=dpdk option:dpdk-devargs=0000:02:00.0
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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

该命令清除恢复到默认的MTU
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ovs-vsctl set interface vhost-client-0 mtu_request=[]
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, w1 L7 k, V7 y% x: ~3 |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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' [" l, B" L- d5 K& Xovs-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