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

admin

忘记设置ovs网卡的MTU值：
error: Cannot get interface MTU on 'win2019port-le': No such device
6 c% g8 T3 [4 ?4 g9 U$ qerror: Failed to start domain instance-00000130
  b; I! E9 f$ ~& s0 n2 eerror: Cannot get interface MTU on 'win2019port-le': No such device

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admin

OVS-SETUP

. p( I; d9 W* V9 ~4 ?1 J) R4 w1、清除之前的环境
killall ovsdb-server ovs-vswitchd
$ |; N, ]" U% I% F8 [* Qrm -f /var/run/openvswitch/vhost-user*
rm -f /etc/openvswitch/conf.db
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9 S, E7 T. d+ Z. r7 E. S2、启动ovsdb

2 a4 F# v) t' e" s: K: kexport DB_SOCK=/var/run/openvswitch/db.sock
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- r: }( k) P* O0 W, V( ~3 X: Uovsdb-tool create /etc/openvswitch/conf.db /usr/share/openvswitch/vswitch.ovsschema
/ u, ^8 }# e. ]) }6 \/ S$ u- b( @ovsdb-server --remote=punix:$DB_SOCK --remote=db:Open_vSwitch,Open_vSwitch,manager_options --pidfile --detach
ovs-vsctl --no-wait init
ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-lcore-mask=0x2 //绑定到第2个cpu核上
ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-socket-mem=4096
ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-init=true
启动ovs-vswitch
ovs-vswitchd unix:$DB_SOCK --pidfile --detach --log-file=/var/log/openvswitch/ovs-vswitchd.log
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3、查看支持DPDK是否成功：
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( \3 h6 ~( S9 _; Y9 @3 I# qovs-vsctl get Open_vSwitch . dpdk_initialized
0 S' N' Z1 p7 i% u: n  \7 ztrue
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配置bridge
1  ovs-vsctl add-br ovsbr0 -- set bridge ovsbr0 datapath_type=netdev

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。
' ^6 z! g& ~4 U( H$ kovs-vsctl add-port ovsbr0 vhost-client-0 -- set Interface vhost-client-0 type=dpdkvhostuserclient options:vhost-server-path=/usr/local/var/run/sock0
ovs-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
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在网桥ovsbr0上绑定真实dpdk的物理网卡

) u, W! t4 c( X- s. W! Y- k" rovs-vsctl add-port ovsbr0 dpdkport0 -- set Interface dpdkport0 type=dpdk option:dpdk-devargs=0000:02:00.0

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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3 K$ O/ K: r2 u# {* o  L. Z' [) U该命令清除恢复到默认的MTU
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; E( F* i1 s9 J" eovs-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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# k$ g( T0 l( E9 E4 qovs-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
: w! m" a' t* u; f 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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