Re: [Devil-linux-develop] Devil-linux-develop Digest, Vol 38, Issue 3

[Stephen H F R. <shf...@gm...>]

Bruce,

>>>One solution would be to automatically detect a major hardware change and prompt the user for what to do.

Given we are specifically talking about interface names and MAC
addresses here, how about:

myHWChecksum=`ifconfig | grep HWaddr | md5sum`

eg;

root@gannet:~ # ifconfig | grep HWaddr
eth0      Link encap:Ethernet  HWaddr 00:40:F4:B8:DB:2F
eth1      Link encap:Ethernet  HWaddr 00:40:F4:B8:DB:2E
eth1:0    Link encap:Ethernet  HWaddr 00:40:F4:B8:DB:2E
eth2      Link encap:Ethernet  HWaddr 00:40:F4:B8:DB:2D
eth2:0    Link encap:Ethernet  HWaddr 00:40:F4:B8:DB:2D

root@gannet:~ # ifconfig | grep HWaddr | md5sum
e3f0bea9d48f267949cb060e553caa81  -

root@gannet:~ # ifconfig eth2:0 down

root@gannet:~ # ifconfig | grep HWaddr | md5sum
be7038a7bc2f03025e28e1395ab9785e  -

This would detect different mac addresses, and changed association
between interface name and mac address.

Not sure what we'd do with it though...

Regards - Steve

"Stephen H F Ralph" <shf...@gm...>

>
> Message: 1
> Date: Tue, 20 Apr 2010 12:53:52 -0400
> From: Bruce Smith <bw...@re...>
> Subject: Re: [Devil-linux-develop] Potential bug - save-config
>        includes        "/etc/udev/rules.d/70-persistent-net.rules"
> To: dev...@li...
> Message-ID:
>        <r2j...@ma...>
> Content-Type: text/plain; charset=ISO-8859-1
>
> One solution would be to automatically detect a major hardware change
> and prompt the user for what to do.  Kinda like what happens with a
> new version of DL.  Although I'm not sure exactly how to detect a
> major hardware change, and what constitutes "major".
>
>  - BS
>