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

Hi, Stephen && David

Any update ?

Best Regards!
Zhu Yanjun
On 02/16/2015 12:55 PM, yzhu1 wrote:

Hi, Stephen

Follow your advice, I made a new patch. This patch will turn off
carrier when a new bridge interface is created. Please comment on it.

Thanks a lot.
Zhu Yanjun
On 02/14/2015 02:30 AM, Stephen Hemminger wrote:

quoted

On Fri, 13 Feb 2015 17:57:45 +0800
yzhu1 [off-list ref] wrote:

quoted

Hi, all

I made this test on ubuntu 14.04 with kernel 3,19-rc7:

1. brctl addbr br0

2. ifconfig br0 up

3. ifconfig br0 (br0's status is with 'RUNNING')

4. brctl addif br0 eth0

5. brctl delif br0 eth0

6. ifconfig br0 (br0's status is without 'RUNNING')

When there is no sub-interface, the flag "RUNNING" is missing after the
last sub-interface is removed.

As such, should we keep "RUNNING" flag after the last sub-interface is
removed?

This is intentional. If there are no active ports in bridge, then
we want to tell applications that packets will go nowhere.