How about using ethtool -p which causes the LED of the NIC to blink?
On Wed, Jan 15, 2014 at 4:05 PM, Les Mikesell <lesmikesell@xxxxxxxxx> wrote:
> On Wed, Jan 15, 2014 at 6:05 AM, Steve Clark <sclark@xxxxxxxxxxxxx> wrote:
>> On 01/14/2014 08:34 PM, Les Mikesell wrote:
>>
>> On Tue, Jan 14, 2014 at 7:17 PM, Warren Young <warren@xxxxxxxxxxx> 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.
>>
>> I get that network interfaces can move around on you, but I thought that
>> was why they started putting the MAC address in the ifcfg-eth? scripts.
>> What problem did that not solve, that we had to switch to this new system?
>>
>> 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.
>>
>> Now I have to remember which *PCI slot* my Ethernet card is in when I
>> run "ifconfig" unless I want to dig through the full listing.
>>
>> Yes, but that's something you _can_ know.
>>
>> How can you know it? And if you know which port is which why isn't in the
>> instruction
>> with the drive so the people on site know which port is which?
>
> 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.
>
> --
> Les Mikesell
> lesmikesell@xxxxxxxxx
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