[ovs] ovs开启日志debug

如题

[root@vrouter1 ~]# ovs-appctl vlog/set netdev:file:dbg

[root@vrouter1 ~]# ovs-appctl vlog/set netdev_dpdk:file:dbg

[root@vrouter1 ~]#

[root@vrouter1 ~]# ovs-appctl vlog/list

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