Re: NetworkManager Bridges in Fedora

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On 16.01.2014 21:38, Dan Williams wrote:
> On Thu, 2014-01-16 at 14:53 -0500, Steve Dickson wrote:
>>
>> On 16/01/14 14:39, Steve Dickson wrote:
>>>
>>>
>>> On 16/01/14 14:09, Dan Williams wrote:
>>>> Also, if wouldn't mind passing along the systemd journal output for
>>>> NetworkManager, that might help us figure out what's going on:
>>>>
>>>> journalctl -b _SYSTEMD_UNIT=NetworkManager.service
>>> The log is at:
>>>   http://steved.fedorapeople.org/tmp/nm.log 
>> I bet ya the hang has something to do with these messages:
>>
>>    <info> (bridge0): IPv4 config waiting until carrier is on
>>    <info> (bridge0): IPv6 config waiting until carrier is on
>>    <info> Activation (bridge0) Stage 3 of 5 (IP Configure Start) complete.
>>    
>> What carrier is it waiting on? em1 is already up and running... 
> 
> So what's happening here is that you two
> configurations/connections/profiles that apply to em1: "ifcfg-em1", and
> "ifcfg-bridge0_slave_1".  And "ifcfg-em1" is getting chosen, but it's
> not a bridge slave configuration, it's just a normal DHCP configuration.
> 
> Since "ifcfg-em1" is not a bridge slave configuration, it never gets
> added to the bridge master, and the bridge master sits around waiting
> for slaves because it has no carrier which is required for DHCP.
> 
> Persistent fix #1:
> edit ifcfg-em1 and change ONBOOT=yes to ONBOOT=no
> nmcli con reload
> then do "Runtime fix" below
> 
> Persistent fix #2:
> rm /etc/sysconfig/network-scripts/ifcfg-em1
> nmcli con reload
> then do "Runtime fix" below
> 
> (or use nm-connection-editor to delete 'em1' or uncheck "Connect
> automatically" from the General tab.)
> 
> Runtime fix (not persistent):
> nmcli dev disconnect em1
> nmcli con up "bridge0 slave 1"
> 
> 
> ------
> (In old "network" service speak, the runtime operation would be:
> 
> ifdown em1
> ifup bridge0_slave_1
> 
> and we still expect these commands to work even when NetworkManager is
> managing the interface.)
> ------
> 
> Dan
> 

I'm doing this differently and now I don't know which method is
recommended by RH/Fedora gurus. I don't use
/etc/sysconfig/network-scripts at all but placed all network related
configuration in /etc/NetworkManager/system-connections/ directory. Now
I'm not sure if I should convert back to using /etc/sysconfig or what?
Not to mention that GUI tool is c... and I had to use text editor to
configure network bridging.



Mateusz Marzantowicz
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