linux - ubuntu 14.04有线连接连接和断开

Question

两周前我在 HP Proliant dl380 gen 9 上安装了 Ubuntu 14.04 LTS。自从我安装以来，它一直表现不佳，白天自动断开连接，晚上和周末再次连接(高峰时段断开连接)。如果我在白天拔出并插入网络电缆，它往往会连接几分钟，然后断开连接(同时在网络区域上显示已连接的图标)。命令的输出lspci -knn | grep Eth -A2返回

02:00.0 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5719 Gigabit Ethernet PCIe [14e4:1657] (rev 01)
Subsystem: Hewlett-Packard Company Device [103c:22be]
Kernel driver in use: tg3

02:00.1 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5719 Gigabit Ethernet PCIe [14e4:1657] (rev 01)
Subsystem: Hewlett-Packard Company Device [103c:22be]
Kernel driver in use: tg3

02:00.2 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5719 Gigabit Ethernet PCIe [14e4:1657] (rev 01)
Subsystem: Hewlett-Packard Company Device [103c:22be]
Kernel driver in use: tg3

02:00.3 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5719 Gigabit Ethernet PCIe [14e4:1657] (rev 01)
Subsystem: Hewlett-Packard Company Device [103c:22be]
Kernel driver in use: tg3

Answer 1

终于通过14e4:1687 broadcom tg3 network driver disconnects under high load找到了答案。使用 ethtool 禁用 highdma 似乎可以解决该问题，为了使解决方案永久生效，请在/etc/udev/rules.d/70-persistent-net.rules 中添加 udev 规则:

ACTION=="add", SUBSYSTEM=="net", ATTRS{vendor}=="0x14e4", ATTRS{device}=="0x1687", RUN+="/sbin/ethtool -K %k highdma off"