lkml.org 
[lkml]   [2002]   [Aug]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: ethtool documentation
On Tue, 6 Aug 2002, Richard B. Johnson wrote:

| On Tue, 6 Aug 2002, Chris Friesen wrote:
|
| > "Richard B. Johnson" wrote:
| >
| > > Because of this, there is no such thing as 'unused eeprom space' in
| > > the Ethernet Controllers. Be careful about putting this weapon in
| > > the hands of the 'public'. All you need is for one Linux Machine
| > > on a LAN to end up with the same IEEE Station Address as another
| > > on that LAN and connectivity to everything on that segment will
| > > stop. You do this once at an important site and Linux will get a
| > > very black eye.
| >
| > Can't we already tell cards (some of them anyway) what MAC address to use when
| > sending packets? This doesn't overwrite the EEPROM, but it does last for that
| > session...
| >
| > Chris
|
| Sure you can. And it was assumed that the MAC address provided by
| the manufacturer would always be used by the software for the MAC
| address on the wire. However, 'software engineers' have decided

Assumed by whom? IEEE allows locally administered addresses,
and most NIC mfrs that I know of support/allow them.

| that they don't have to follow the rules, so they provide hooks
| so you can use a MAC address of anything. They even call it
| "Local Administration...", which decoded means; "Screw the
| committee".

<snippage>

--
~Randy

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:27    [W:0.061 / U:0.396 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site