I've got a HP Proliant 460c blade server running CentOS 5.x. For some reason CentOS thinks the mac address for ETH0 is something (18:a9:05:71:xx:xc) but I'm not able to find that MAC at all on the on-board administrator. In fact, if I use the MAC address that shows up in the onboard administrator and try to hardcode it to the nic (under /etc/sysconfig/network-script/ifcfg-eth0), I get an error:
Device eth0 has different MAC address than expected.
Where can I definitively confirm what the system sees at the MAC address? ifconfig -a shows the "incorrect" one.
On the CenTOS host, I'm seeing this in ifconfig results (slightly modified to protect the innocent):
eth0 HW 18:a9:05:71:xx:xc eth0:0 HW 18:a9:05:71:xx:xc eth1 HW 18:A9:05:71:xx:xd eth1:0 HW 18:A9:05:71:xx:xd eth2 HW F4:CE:46:8X:XX:40 eth3 HW F4:CE:46:8X:XX:44
I'm not sure where the 18:a9 MAC addresses are coming from.
When I check the port mapping for the device bay that belongs to the server, I see:
Mezzanine Device Port: ENET1 Device ID: d4:85:64:49:xx:x8 Mezzanine Device Port: iSCSI Port 1 Device ID: F5:CE:46:83:xx:x1 Mezzanine Device Port: ENET2 Device ID: d4:85:64:49:xx:xc Mezzanine Device Port: ISCSI Port 2 Device ID: F5:CE:46:xx:xx:x1
I also see
Mezzanine Device Port: Port 1 Device ID: d4:85:64:xx:xx:be Mezzanine Device Port: Port 2 Device ID: d4:85:64:xx:xx:bf
Note that none of them pertain to the MAC that CentOS thinks should be there. I've also completely reinstalled CentOS and the problem persists. So it seems likely that something on the system is telling CentOS that the MAC should be used but I'm not sure where.