我有两台双机箱 HP ProLiant DL3680 G6，运行 RHEL 5.5 64 位。其中一台缺少两个网络接口（eth2 和 eth7），也就是说，它们不可用：
# ifconfig eth2
eth2: error fetching interface information: Device not found
# ethtool eth2
Settings for eth2:
Cannot get device settings: No such device
Cannot get wake-on-lan settings: No such device
Cannot get message level: No such device
Cannot get link status: No such device
No data available
我发现“lspci -v”命令的输出对于一个正常运行的 NIC 和缺失的 NIC 存在差异。您可以在此处阅读输出并注意差异：
02:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
Subsystem: Hewlett-Packard Company NC382i Integrated Quad Port PCI Express Gigabit Server Adapter
Flags: bus master, fast devsel, latency 0, IRQ 170
Memory at f6000000 (64-bit, non-prefetchable) [size=32M]
[virtual] Expansion ROM at e6310000 [disabled] [size=64K]
Capabilities: [48] Power Management version 3
Capabilities: [50] Vital Product Data
Capabilities: [58] Message Signalled Interrupts: 64bit+ Queue=0/4 Enable-
Capabilities: [a0] MSI-X: Enable+ Mask- TabSize=9
Capabilities: [ac] Express Endpoint IRQ 0
Capabilities: [100] Device Serial Number 50-75-4b-fe-ff-55-26-00
Capabilities: [110] Advanced Error Reporting
Capabilities: [150] Power Budgeting
Capabilities: [160] Virtual Channel
03:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet
Subsystem: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet
Flags: fast devsel, IRQ 210
Memory at fb2c0000 (64-bit, non-prefetchable) [disabled] [size=256K]
Capabilities: [48] Power Management version 3
Capabilities: [50] Vital Product Data
Capabilities: [58] Message Signalled Interrupts: 64bit+ Queue=0/3 Enable-
Capabilities: [a0] MSI-X: Enable- Mask- TabSize=1
Capabilities: [ac] Express Endpoint IRQ 0
Capabilities: [100] Device Serial Number 00-00-00-00-00-00-00-00
Capabilities: [110] Advanced Error Reporting
Capabilities: [150] Power Budgeting
Capabilities: [160] Virtual Channel
请注意禁用的“内存”行和报告的序列号中缺少的描述字符串“(rev 20)”。
您认为这是硬件问题吗？也许网卡刷错了，ROM 也没有正确更新？
提前感谢
更新 2014-07-28
Lawrence 要求我展示 dmesg 的输出。在 dmesg 的输出中发现了以下几行：
ACPI: PCI Interrupt 0000:03:00.0[A] -> GSI 18 (level, low) -> IRQ 210
PCI: Setting latency timer of device 0000:03:00.0 to 64
bnx2 0000:03:00.0: Firmware not running, aborting.
ACPI: PCI interrupt for device 0000:03:00.0 disabled
ACPI: PCI Interrupt 0000:03:00.1[B] -> GSI 19 (level, low) -> IRQ 218
PCI: Setting latency timer of device 0000:03:00.1 to 64
bnx2 0000:03:00.1: Firmware not running, aborting.
ACPI: PCI interrupt for device 0000:03:00.1 disabled
我从来没有更新过这些网卡的固件。