On 07/23/2009 05:49:55 AM, Frank Steiner wrote:
Hi,
after switching from SLES 10 to 11 I saw that I couldn't use
FORCE_PERSISTENT_NAMES=no anymore.
How can we prevent persistent network device names? There are some
problems with this:
1) If 70-persistent-net.rules is removed, it is recreated with totally
strange values. E.g. I have file with
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR{address}=="00:1b:21:0e:3e:68", ATTR{type}=="1", KERNEL=="eth*",
NAME="eth0"
Now I remove the file (we have a diskless environment where those
files
can get removed due to a local disk change) and call "udevadm
trigger".
The new 70-persistent-net.rules now contains:
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR{address}=="00:1b:21:0e:3e:68", ATTR{type}=="1", KERNEL=="eth*",
NAME="eth_s6_0"
Here your mac addresses are probably changing. Are you using the
forcedeth driver? (See below.)
2) When a mainboard is exchanged, the MACs change. But on the next
boot
I still want the new NICs to be eth0 and eth1, in the order
in which they are recognized by the bios.
It doesn't make sense if those new cards become eth2 and eth3
because the old, non-existing NICs are listed in the rules file
with
their MACs.
So how can we prevent this? Why was the FORCE_PERSISTENT_NAMES option
removed?
Persistent device names might be nice for laptops with wlan or usb
network devices.
For our site with 120 PCs and Servers with it's bad because I can't
care about 120
rules file to make sure they all are always ok before the next boot. I
just want to
get rid of the feature :-)
This is the standard recommendation from the debian irc channel.
You may need to modify just how much of the mac address you keep
and how much you wildcard. Note that there may be a more
appropriate technique, this just leapt to mind.
------------------<snip>----------------------
dpkg(~dpkg@xxxxxxxxxxxxxxxxx)] forcedeth is probably the open-source
nVidia
Ethernet driver, for nForce motherboards. Found in 2.4.23
and later
kernels. Ask me about <forcedeth mac>. See also <mcp67>,
<rtl8211c>.
[msg(dpkg)] forcedeth mac
[dpkg(~dpkg@xxxxxxxxxxxxxxxxx)] If you're using the <forcedeth> driver
and your
network card keeps changing its name each time (eth0, then
eth1, then
eth2, etc), edit /etc/udev/rules.d/70-persistent-net.rules
(Lenny) or
/etc/udev/rules.d/z25_persistent-net.rules (Etch), remove
all but one
entry, and replace the MAC address with "00:00:6c:*". See
also <z25>.
Karl <kop@xxxxxxxx>
Free Software: "You don't pay back, you pay forward."
-- Robert A. Heinlein
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