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

Sun Mar 24 05:16:20 UTC 2013
Joakim Ziegler <joakim at terminalmx.com>

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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