[CentOS] A question about 7

[m.roth at 5-cent.us]

Les Mikesell wrote:
> On Wed, Jan 15, 2014 at 6:05 AM, Steve Clark <sclark at netwolves.com> wrote:
>> On 01/14/2014 08:34 PM, Les Mikesell wrote:
>>
>> On Tue, Jan 14, 2014 at 7:17 PM, Warren Young <warren at etr-usa.com>
>> wrote:
>>
>> I don't know about "less consistent", but I always considered it a
>> feature in Linux vs the BSDs or big iron Unix that I could always count
>> on the first network interface being "eth0".
>>
>> What does 'first' mean?  And the same one isn't consistently first.
<snip>
>> The problem is when you clone a disk and ship it to a location with
>> 'hands-on' support that doesn't know linux to install in a new chassis
>> that will arrive there at the same time.   Somehow you have to get
>> someone to put the 4 network cables in the right NICs before anything
>> can connect.   With things tied to MAC addresses that you don't know
>> ahead of time, nothing will work.

When you clone a disk, you can't get the ifcfg-eth* and
70-persistant-net-rules from the old machine, or you don't have that info
under version control, with all those systems?
<snip>
> If you insert the card yourself, you obviously know the slot.  And you
> can tell the position from the back just by looking at it.   But
> Centos6 will detect in random order, so knowing the name on one box
> doesn't help with another.   We have to go through contortions
> plugging on cable in at a time, doing an 'ifconfig up' and checking
> which interface shows link up.   And the people  doing that part wish
> we used more windows instead of Linux.

ifconfig up? Not ethtool eth?

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