CentOS 6.6 安裝遇到網卡問題，Supermicro 主機板上

情況是，當主機安裝完 CentOS 6.6 後，使用 SSH 操作一段時間，連線突然中斷，再來就 ping 不到，本機也 ping 不到同網段的，本機自 ping 自已的 ip 就可以

而 message 出現

Nov 22 20:34:12 st kernel: e1000e 0000:07:00.0: eth0: Timesync Tx Control register not set as expected

網卡資訊

# ethtool -i eth0
driver: e1000e
version: 2.3.2-k
firmware-version: 1.9-0
bus-info: 0000:07:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: no

# ethtool eth0
Settings for eth0:
	Supported ports: [ TP ]
	Supported link modes:   10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Full 
	Supported pause frame use: No
	Supports auto-negotiation: Yes
	Advertised link modes:  10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Full 
	Advertised pause frame use: No
	Advertised auto-negotiation: Yes
	Speed: 1000Mb/s
	Duplex: Full
	Port: Twisted Pair
	PHYAD: 1
	Transceiver: internal
	Auto-negotiation: on
	MDI-X: on (auto)
	Supports Wake-on: pumbg
	Wake-on: g
	Current message level: 0x00000007 (7)
			       drv probe link
	Link detected: yes

解決方式是 要在 /boot/grub/grub.conf 裡加入 pcie_aspm=off

kernel /vmlinuz-xxxxxxxxxxxxxxxxxx ro root=xxxxxxxxxxxx pcie_aspm=off