Switch eth0 and eth1, how?

[JD]

On 10/19/2012 03:35 PM, Fernando Cassia wrote:
> In my server I have eth0 and eth1 (previously were em16, em17, but I
> hated it so I changed to the traditional approach).
>
> Each NIC port is connected to a different ISP. However, more often
> than not while moving things around I get the cables reversed so ETH0
> goes to ISP2 and ETH0 goes to ISP2, or vice versa, ie the cables are
> interchanged.
>
> So... is there a way, in such situation, to manually (say, from a bash
> script) bring down both eth ports, and re-arrange those? (so that eth1
> becomes eth0), and do so without a reboot?.
>
> I´d like to make eth0 and eth1 consistent regardless of mixed cabling
> so every time I bring down eth0 I know what isp I´m bringing down.
> What IP each port is connected to I can figure out via a query to
> www.whatismyip.com, but the question remains if it´s possible to
> change the naming of two ethernet ports without a reboot.
>
> What would be the best way? ethtool?
>
> TIA
> FC
While I do not know how to answer your question,
I would LOVE to know how you got away from the
emXY naming , to the traditional ethX naming.
I have been trying to do so for a long time and no
one on the list has been able to provide a working
solution. Fixing /etc/udev/rules.d/70-persistent-net.rules
does not help at all.

Thanx.