[CentOS] How to make a network interface come up automatically on link up?

Sun Mar 24 07:03:41 UTC 2013
Joakim Ziegler <joakim at terminalmx.com>

How do I do that? I've not used network manager to set it up, I just 
made the ifcfg-eth2 file from scratch.

-- 
Joakim Ziegler  -  Supervisor de postproducción  -  Terminal
joakim at terminalmx.com   -   044 55 2971 8514   -   5264 0864

On 24/03/13 0:46, Eero Volotinen wrote:
> Try to disable network manager on that interface
> On Mar 24, 2013 7:17 AM, "Joakim Ziegler" <joakim at terminalmx.com> wrote:
>
>> I do have ONBOOT=yes, yes. It comes up on boot (if there's a link), it
>> just doesn't come up after the link goes down and comes back up.
>>
>> --
>> Joakim Ziegler  -  Supervisor de postproducción  -  Terminal
>> joakim at terminalmx.com   -   044 55 2971 8514   -   5264 0864
>>
>> On 23/03/13 21:13, Earl Ramirez wrote:
>>> On Sat, 2013-03-23 at 20:27 -0600, Joakim Ziegler wrote:
>>>> I have a recently installed Mellanox VPI interface in my server. This is
>>>> an InfiniBand interface, which, through the use of adapters, can also do
>>>> 10GbE over fiber. I have one of the adapter's two ports configured for
>>>> 10GbE in this way, with a point to point link to a Mac workstation with
>>>> a Myricom 10GbE card.
>>>>
>>>> I've configured this interface on the Linux box (eth2) using
>>>> /etc/sysconfig/network-scripts/ifcfg-eth2 , setting its IP address, MTU,
>>>> subnet, etc.
>>>>
>>>> Everything seems to work fine, with a single exception. If I reboot the
>>>> Mac on the other end, causing the link state of the fiber interface to
>>>> bounce, the network interface on the Linux box doesn't come back up when
>>>> the link comes back up. That is, ifconfig shows it as having the link
>>>> up, but it doesn't do the equivalent of "ifup eth2" when the link comes
>>>> back, so it doesn't get an IP, the routing table doesn't get updated,
>> etc.
>>>>
>>>> So, my question is, how can I make CentOS automatically configure this
>>>> interface when the link comes back up? It's a bit annoying having to log
>>>> in and do ifup eth2 every time...
>>>>
>>>
>>> Joakim,
>>>
>>> Do you have ONBOOT=yes in the /etc/sysconfig/network-scripts/ifcfg-eth2?
>>>
>>>
>>>
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