NetworkManager - have to reboot to change connections

[poma]

On 24.03.2014 08:52, Ahmad Samir wrote:
> On 22 March 2014 04:40, CS_DBA <cs_dba at consistentstate.com> wrote:
> 
>>
>> On 03/21/2014 05:43 PM, Ed Greshko wrote:
>>
>>> On 03/22/14 07:39, CS_DBA wrote:
>>>
>>>> On 03/21/2014 05:33 PM, Ed Greshko wrote:
>>>>
>>>>> On 03/22/14 06:07, CS_DBA wrote:
>>>>>
>>>>>> I can plug a hard wire into my laptop and boot up, it comes up
>>>>>> connected.
>>>>>>
>>>>>> I can boot up with no connection and then tell it to connect to the
>>>>>> wireless it works fine, but if later I click disconnect for the wireless
>>>>>> and plug the hard wire (cat 6) cable in it says it's "connecting"  but
>>>>>> spins until I finally reboot.
>>>>>>
>>>>> Have you tried unplugging the cable, waiting a bit, and plugging it in
>>>>> again?
>>>>>
>>>>>  Seems to work fine, but when I try and move from wireless to em1 "on
>>>> the fly" I see the issue
>>>>
>>> I don't quite understand....  Are you saying.....
>>>
>>> You boot up with no connection and then tell it to connect to the
>>> wireless it works fine.  You then disconnect from wireless, plug in the
>>> cable, status becomes "connecting" but never connects.  Then, you uplug the
>>> cable, wait a bit, plug it back in....and all is well.
>>>
>>> Is that what you are doing/seeing?  You don't need to reboot...but you do
>>> need to plug-in, plug-out, plug-in?
>>>
>>>
>> Here's what I see
>>
>> 1) If I boot up with no cable plugged in it auto connects to the wireless
>> immediately
>>
>> 2) If I boot up with the cable (cat 5/6) plugged in it immediately
>> connects to em1
>>
>> 3) If I boot with the cable plugged in, then unplug the cable it connects
>> to the wireless quickly
>>
>> 4) If I boot up with the cable plugged in, disconnect the cable, then
>> re-connect it it re-connects to em1 fine
>>
>>
> [...]
> 
>> 5) however if I boot up with no cable, let it connect to the wireless,
>> then plug in the cable it attempts to connect to em1 but never completes
>>
>>
> I don't have wireless, but I see a similar issue, if I boot the machine
> with the ethernet cable disconnected, then connect it after boot, the
> system says/thinks the connection is up but it doesn't work, can't even
> ping the router.
> 
> Some workarounds:
> - Disconnecting the cable, waiting a few seconds then replugging it makes
> it work
> - Bringing the connection down manually, then up seems to work too either
> using:
> # ifdown em1 && sleep 5 && ifup em1
> or:
> # ip link set em1 down && sleep 5 && ip link set em1 up
> 
> (em1 is the connection name on my box).
> 
> restarting the NetworkManager service doesn't seem to have an effect. With
> or without DHCP doesn't matter too. This is with Intel I217-V ethernet chip
> and the e1000 kernel module.

nmcli connection/device up/down/(dis)connect id/ifname
man 1 nmcli

Perhaps file a bug report, you and cs_dba?
https://bugzilla.redhat.com/enter_bug.cgi?product=Fedora&component=NetworkManager


poma