2017-11-30 14:15 GMT+08:00 d tbsky <tbskyd@gmail.com>:
> 2017-11-29 22:49 GMT+08:00 Jason A. Donenfeld <Jason@zx2c4.com>:
>> On Wed, Nov 29, 2017 at 3:16 PM, d tbsky <tbskyd@gmail.com> wrote:
>>>      sorry I misunderstand you. you mean I modify the script and run
>>> in my environment to reveal the problem?
>>> ok I will try to do it.
>>
>> Take what I sent you. Run it. If it breaks, send me the output and
>> your kernel. If it doesn't break, mess with it until it breaks, and
>> then send it back to me.
>
> Hi jason:
>
>  "uname -a" result:
>
>  Linux localhost.localdomain 3.10.0-693.5.2.el7.x86_64 #1 SMP Thu Oct
> 19 10:13:14 CDT 2017 x86_64 x86_64 x86_64 GNU/Linux
>
>  your original script runs fine under my environment.
>  I add  three 3 lines before "ip1 link add veth1"  to reveal the problem:
>
> ip1 link add dummy0 type dummy
> ip1 addr add 10.0.0.10/24 dev dummy0
> ip1 link set dummy0 up
>

sorry my fault. incorrect copy paste to email break the script. script
as attachment.

Regards,
tbskyd