Centos server, had to replace the motherboard now the embedded NICs don't work Post: 302931990

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biosdevname

BIOSDEVNAME(1)						      General Commands Manual						    BIOSDEVNAME(1)

NAME

       biosdevname - give BIOS-given name of a device

SYNOPSIS

       biosdevname [options] [args]...

DESCRIPTION

       biosdevname takes a kernel device name as an argument, and returns the BIOS-given name it "should" be.

OPTIONS

       -i, --interface
	      Treat [args] as ethernet devs

       -d, --debug
	      Enable debugging

       -p, --policy [physical|all_ethN]

       -P, --prefix [string]
	      string use for embedded NICs in the physical policy (default=em)

       -x, --nopirq
	      Do not use $PIR table for mapping PCI device to slot. Some BIOS have incorrect values.

       -s, --smbios [x.y]
	      Require minimum SMBIOS version x.y

POLICIES

       The  physical  policy  is  the current default.	However, when invoking biosdevname in udev rules, one should always specify the policy you
       want, as the default has changed over time.
       The physical policy uses the following scheme:

       em<port>[_<virtual instance>]
	      for embedded NICs

       p<slot>p<port>[_<virtual instance>]
	      for cards in PCI slots

       The    all_ethN policy makes a best guess at what the device order should be, with embedded devices first,  PCI	cards  in  ascending  slot
	      order,  and  ports in ascending PCI bus/device/function order breadth-first.  However, this policy does not work if your PCI devices
	      are hot-plugged or hot-pluggable, including the virtual functions on an SR-IOV device.  In a hot-plug scenario, each  separate  udev
	      instance	will be invoked in parallel, while the device tree is still being populated with new devices.  Each udev instance will see
	      a different PCI tree, and thus cannot provide consistent enumeration.  Use of this policy should be limited to only scenarios  where
	      all PCI devices are present at boot (cold-plug).

EXIT CODES

       Returns 0 on success, with BIOS-suggested name printed to stdout.
       Returns 1 on provided device name lookup failure.
       Returns	2  if system BIOS does not provide naming information.	biosdevname requires system BIOS to provide naming information, either via
       SMBIOS or sysfs files.
       Returns 3 if not run as root but requires root privileges.
       Returns 4 if running in a virtual machine.

SEE ALSO

       http://linux.dell.com/wiki/index.php/Oss/libnetdevname
       http://linux.dell.com/files/biosdevname/
       git://linux.dell.com/biosdevname.git

RELATED PROGRAMS

       The dmidecode package contains two tools useful for debugging BIOS features that biosdevname  uses,  specifically  dmidecode  to  read  the
       SMBIOS Type 9 and Type 41 tables, and biosdecode to read the PCI IRQ Routing Table.  Please include the output of each of these programs in
       any bug reports.

AUTHOR

       biosdevname was written by  Matt Domsch <Matt_Domsch@dell.com>

       This manual page was written by Rudy Gevaert <Rudy.Gevaert@UGent.be>, for the Debian project (but may be used by others).

								   Nov 28, 2010 						    BIOSDEVNAME(1)

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LEARN ABOUT CENTOS

biosdevname