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Operating Systems Linux Red Hat Centos server, had to replace the motherboard now the embedded NICs don't work Post 302932018 by fpmurphy on Sunday 18th of January 2015 10:28:46 AM
Old 01-18-2015
Comment out the MAC address lines in your ifcfg-ethX files. Shut down your interfaces. Bring up your interfaces one by one, and use ifconfig or ethtool to discover the MAC address of the interface.
 

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SETETHER(8)						      System Manager's Manual						       SETETHER(8)

NAME
setether - Set the ethernet address for use with DECnet SYNOPSIS
setether <if> [<if>...]|all [options] DESCRIPTION
Set ethernet MAC address on ethernet adaptors This script should be run at system startup. It will change the ethernet hardware (MAC) address of any or all ethernet interfaces to match the DECnet node address. DECnet requires that the MAC address of all ethernet adaptors running the protocol be set approriately. If you do not run setether then you must change the ethernet address in some other way for DECnet to work. By default no ethernet interfaces will have their MAC addresses changed by setether, if you specify all then all interfaces name eth* will be changed, otherwise a list of interface names can be specified. setether will enable (UP) all interfaces it changes the MAC addresses of. (2.4 only) The first interface specified on the command-line will also be made the default interface for DECnet operations (ie attempts to contact nodes not in the neighbour table will be done over this interface). This script must be run with the interface inactive, it is normally run from /etc/init.d/decnet before TCP/IP starts up. EXAMPLES
set the MAC address of eth0. # /sbin/setether eth0 set the MAC address of all ethernet interfaces # /sbin/setether all HELPFUL HINTS
If you have multiple ethernet cards on your system and they are connected to the the same network you should specify which one you want to use for DECnet communication on the setether command line, otherwise they will both be given the same MAC address and this is probably not what you want. Running DECnet on multiple ethernet interfaces only works under Linux 2.4. If you are running Linux 2.2 then the interface name on the setether command line must match the one in /etc/decnet.conf(5). SEE ALSO
decnet.conf(5), dntype(1), dndir(1), dndel(1), dnetd(8), dnping(1) DECnet utilities March 01 2001 SETETHER(8)
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