Hi, there - persistent-net.rules is a clever scheme to prevent your computer from booting after you replace a burned out motherboard. To disable it, run:


touch /etc/udev/rules.d/75-persistent-net-generator.rules
rm /etc/udev/rules.d/70-persistent-net.rules


K.O.


On Mon, Jul 28, 2014 at 09:35:17AM +0000, SCHAER Frederic wrote:
> Hi,
> 
> >From time to time, we get reboot issues with some machines, and each time it looks like there are duplicated persistent rules for the Ethernet devices :
> 
> > cat /etc/udev/rules.d/70-persistent-net.rules
> # This file was automatically generated by the /lib/udev/write_net_rules
> # program, run by the persistent-net-generator.rules rules file.
> #
> # You can modify it, as long as you keep each rule on a single
> # line, and change only the value of the NAME= key.
> 
> # PCI device 0x8086:0x1521 (igb) (custom name provided by external tool)
> SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="84:8f:69:fb:c1:2a", ATTR{type}=="1", KERNEL=="eth*", NAME="em1"
> 
> # PCI device 0x8086:0x1521 (igb) (custom name provided by external tool)
> SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="84:8f:69:fb:c1:2b", ATTR{type}=="1", KERNEL=="eth*", NAME="em2"
> 
> 
> # PCI device 0x8086:0x1521 (igb) (custom name provided by external tool)
> SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="84:8f:69:fb:c1:2a", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
> 
> # PCI device 0x8086:0x1521 (igb) (custom name provided by external tool)
> SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="84:8f:69:fb:c1:2b", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
> 
> The second set of rules seem to overwrite the first one, and then we get issues with our network config.
> This does not happen on all nodes, just apparently to some random ones, sometimes.
> I'm wondering if some of you might have faced and solved that erratic thing already ?
> 
> We want to keep the emX scheme for nodes which support it...
> 
> Thanks

-- 
Konstantin Olchanski
Data Acquisition Systems: The Bytes Must Flow!
Email: olchansk-at-triumf-dot-ca
Snail mail: 4004 Wesbrook Mall, TRIUMF, Vancouver, B.C., V6T 2A3, Canada