# Re: If bridge have no sub-interfaces, it's status may be still with 'RUNNING'

- From: yzhu1 \<hidden\>
- Date: 2015-02-25 02:57:05 
- List: netdev
- Page: https://ratatoskr.run/netdev/2015/02/10978841
- Thread: https://ratatoskr.run/netdev/2015/02/10978030/t.md

```text
Hi, Stephen && David

Any update?

Zhu Yanjun

On 02/18/2015 12:14 AM, Zhu, Yanjun wrote:
> Hi, all
>
> We should make it compatible. So I made a patch to turn on carrier on this bridge interface when the last sub interface is removed.
>
> Hi, David
>
> Please make tests with this latest patch. Thanks a lot.
>
> Best Regards!
> Zhu Yanjun
> ________________________________________
> From: Stephen Hemminger [stephen@networkplumber.org]
> Sent: Monday, February 16, 2015 8:51 AM
> To: David Ahern
> Cc: Zhu, Yanjun; netdev; Wu, Kuaikuai; Tao, Yue
> Subject: Re: If bridge have no sub-interfaces, it's status may be still with 'RUNNING'
>
> Originally bridge code would start with carrier off,
> but there were users using bridge as a form of dummy device
> and this broke them. Therefore it was decided (like 5 yrs ago),
> that bridge should start with carrier on.
```