Xen devel - Aug 2012 - 【problem】Why can't modify mac addr in the saved state file to restore a vm with the specific mac addr?

Hi all,
    `xl save domid saved-state-file` will generate a saved state file which
consists of three parts: vm configuration, memory dump and qemu state info.

    So, I try to modify the `vifspec` in vm configuration for a different
mac addr, and modify the 6-bytes mac in the rtl8139 section of the qemu
state info.

    But when restoreing by the modified saved state file, although I
restarted the network within the vm, I couldn''t get the specific mac
addr ,
it''s still the original mac.

   Why should this happen?  It''s odd.

Thanks


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On Mon, Aug 27, 2012 at 3:19 PM, 马磊 <aware.why@gmail.com> wrote:
> Hi all,
>     `xl save domid saved-state-file` will generate a saved state file
> which consists of three parts: vm configuration, memory dump and qemu state
> info.
>
>     So, I try to modify the `vifspec` in vm configuration for a different
> mac addr, and modify the 6-bytes mac in the rtl8139 section of the qemu
> state info.
>
>     But when restoreing by the modified saved state file, although I
> restarted the network within the vm, I couldn''t get the specific
mac addr ,
> it''s still the original mac.
>
>    Why should this happen?  It''s odd.
>
> Thanks
>
In `xm restore` way , the same method above can achive the expected goal.
What happened to that?


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