if have the following two network cards
the "02:00.0" is an additional pci-express-card and recognized as "eth0"
the "00:19.0" is on-board and ignored from the system
00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04)
02:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
why is the on-board not activated while it is receiving broadcast-packets
DMESG:
pci 0000:00:19.0: reg 10: [mem 0xfe600000-0xfe61ffff]
pci 0000:00:19.0: reg 14: [mem 0xfe628000-0xfe628fff]
pci 0000:00:19.0: reg 18: [io 0xf080-0xf09f]
pci 0000:00:19.0: PME# supported from D0 D3hot D3cold
pci 0000:00:19.0: PME# disabled
only the PCI-Express card is recognized by udev
[root@rh:~]$ 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 0x8086:0x10d3 (e1000e) (custom name provided by external tool)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:1b:21:b6:5f:28", ATTR{dev_id}=="0x0",
ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
DMESGG of the working card is much more verbose
pci 0000:02:00.0: reg 10: [mem 0xfe4c0000-0xfe4dffff]
pci 0000:02:00.0: reg 14: [mem 0xfe400000-0xfe47ffff]
pci 0000:02:00.0: reg 18: [io 0xe000-0xe01f]
pci 0000:02:00.0: reg 1c: [mem 0xfe4e0000-0xfe4e3fff]
pci 0000:02:00.0: reg 30: [mem 0xfe480000-0xfe4bffff pref]
pci 0000:02:00.0: PME# supported from D0 D3hot D3cold
pci 0000:02:00.0: PME# disabled
e1000e: Intel(R) PRO/1000 Network Driver - 1.0.2-k4
microcode: CPU6 updated to revision 0x17, date = 2011-04-07
microcode: CPU7 updated to revision 0x17, date = 2011-04-07
e1000e: Copyright (c) 1999 - 2009 Intel Corporation.
e1000e 0000:02:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
e1000e 0000:02:00.0: setting latency timer to 64
alloc irq_desc for 46 on node -1
alloc kstat_irqs on node -1
e1000e 0000:02:00.0: irq 46 for MSI/MSI-X
alloc irq_desc for 47 on node -1
alloc kstat_irqs on node -1
e1000e 0000:02:00.0: irq 47 for MSI/MSI-X
alloc irq_desc for 48 on node -1
alloc kstat_irqs on node -1
e1000e 0000:02:00.0: irq 48 for MSI/MSI-X
e1000e 0000:02:00.0: Disabling ASPM L0s
e1000e 0000:02:00.0: eth0: (PCI Express:2.5GB/s:Width x1) 00:1b:21:b6:5f:28
e1000e 0000:02:00.0: eth0: Intel(R) PRO/1000 Network Connection
e1000e 0000:02:00.0: eth0: MAC: 3, PHY: 8, PBA No: fafa02-0c2
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