[Arm-dev] Network fails Raspberry pi 2
Robert Moskowitz
rgm at htt-consult.com
Thu Dec 31 23:19:06 UTC 2015
On 12/31/2015 06:13 PM, david wrote:
> At 08:40 PM 12/28/2015, you wrote:
>
>
>> On 12/28/2015 10:01 PM, david wrote:
>>> Folks
>>>
>>> I've been having lots of problems with Centos 7 on Raspberry Pi 2.
>>> The network seems to work for a while after a bootstrap, but then
>>> dies. The command
>>> systemctl restart network
>>> always fails. This occurs after installation and updates.
>>>
>>> I wonder of others have had this issue, or is my RPI2 defective?
>>> It's connected to my internal network by a wire-connection to a
>>> working Centos 6 gateway. I posted the results of journalctl
>>> earlier, so won't bother reposting.
>>
>> No problems on my Cubieboard2: medon.htt-consult.com that has been
>> up 4 1/2 days. The only messages on Network that I see are:
>>
>> messages-20151227:Dec 24 09:46:33 medon NetworkManager[523]: <info>
>> nameserver '2001:558:feed::2'
>> messages-20151227:Dec 24 09:46:33 medon NetworkManager[523]: <info>
>> nameserver '2001:558:feed::1'
>> messages-20151227:Dec 24 09:46:33 medon NetworkManager[523]: <info>
>> (eth0): DHCPv6 state changed unknown -> bound
>> messages-20151227:Dec 24 09:46:33 medon NetworkManager[523]: <info>
>> Policy set 'eth0' (eth0) as default for IPv6 routing and DNS.
>> messages-20151227:Dec 24 09:46:33 medon NetworkManager[523]: <info>
>> (eth0): DHCPv6 client pid 1395 exited with status 0
>> messages-20151227:Dec 24 09:46:33 medon NetworkManager[523]: <info>
>> (eth0): DHCPv6 state changed bound -> done
>>
>> which was when I booted it up in my production rack.
>>
>>
>>>
>>> Is this the right mail=list to detect if and when the issue is
>>> addressed?
>>
>> Hopefully others with RPi2 will chime in and it will be here.
>
>
> Robert, and others
>
> In one of those Eureka moments, I believe I understand why my network
> is failing. Examination of the "journalctl" output led me to the
> following:
> - Chronyd is a REPLACEMENT for ntp
> - Running both of them at the same time leads to ntpd disabling the
> ethernet link.
>
> If I'm right, perhaps a note should be added into the Arm web page so
> other dummies like me don't make the same mistake.
>
> For extra bonus points, I wonder if someone could answer the question:
> - Is it OK to use chrony instead of ntp on Centos 6&7 on i386/x86_64
> systems? Should I change over?
I am leaving my C6 (really RSEL6) servers as is with NTP.
all my C7 are using Chrony.
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