netdev - Re: PATCH: Network Device Naming mechanism and policy

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Message-ID: <ac3eb2510910101135t5bedb1ferc0806fe2fee15a83@mail.gmail.com>
Date:	Sat, 10 Oct 2009 20:35:42 +0200
From:	Kay Sievers <kay.sievers@...y.org>
To:	Bill Fink <billfink@...dspring.com>
Cc:	Greg KH <greg@...ah.com>, Matt Domsch <Matt_Domsch@...l.com>,
	Stephen Hemminger <shemminger@...tta.com>,
	netdev@...r.kernel.org, linux-hotplug@...r.kernel.org,
	Narendra_K@...l.com, jordan_hargrave@...l.com
Subject: Re: PATCH: Network Device Naming mechanism and policy

On Sat, Oct 10, 2009 at 20:11, Bill Fink <billfink@...dspring.com> wrote:
> No comment on the specific implementation decision, but I am in the
> process of setting up a large number of test systems with identical
> hardware configurations, and using a master disk image to clone all the
> test systems.  The biggest pain in this process is identiying the MAC
> addresses for each of the six or more network interfaces in each test
> system (we want eth0...ethN to always reference the same physical port
> on the test systems), and then having to modify the 70-persistent-net.rules
> udev file and the HWADDR entry for all the ifcfg-ethX files to reflect
> the correct MAC addresses.  It would be fantastic if there were some
> mechanism for making this part of the process unnecessary.

Udev creates the persistent rules only if no other rule set a name.
Adding something like:
  SUBSYSTEM=="net", KERNEL==""eth*", NAME="eth%n"
in any earlier rules file before the udev generated one will skip all
off the automatic udev rule creation.

Kay
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