物件:
网线 A: 墙内的网线
网线 B: 拖在地上,不是很方便。
电脑 A: 家用台式机 (opensuse tumbleweed)
电脑 B: 公司笔记本 (opensue 42.1)
电脑 C: 老婆的笔记本 (win7)
问题:
电脑 A 无法通过网线 A 获得 IP。
测试:
电脑 B,C 都可以通过网线 A 获得 IP。==> 网线 A 没有问题。
电脑 A 可以通过网线 B 获得 IP。==> 电脑 A 没有问题。
日志:
电脑 A 通过网线 A 获取 IP 时, 电脑的日志:
2 月 08 21:10:05 linux-bg4a NetworkManager[959]: <info> [1486559405.0529] device (enp3s0): Activation: starting connection 'Wired connection 1' (e9a1fbbf-00b7-3506-ba44-7152c8f7e5f2)
2 月 08 21:10:05 linux-bg4a NetworkManager[959]: <info> [1486559405.0530] audit: op="connection-activate" uuid="e9a1fbbf-00b7-3506-ba44-7152c8f7e5f2" name="Wired connection 1" pid=1385 uid=1000 result="success"
2 月 08 21:10:05 linux-bg4a NetworkManager[959]: <info> [1486559405.0530] device (enp3s0): state change: disconnected -> prepare (reason 'none') [30 40 0]
2 月 08 21:10:05 linux-bg4a NetworkManager[959]: <info> [1486559405.0531] manager: NetworkManager state is now CONNECTING
2 月 08 21:10:05 linux-bg4a NetworkManager[959]: <info> [1486559405.0681] device (enp3s0): set-hw-addr: set-cloned MAC address to B6:39:77:ED:A3:C5 (B6:39:77:ED:A3:C5)
2 月 08 21:10:05 linux-bg4a NetworkManager[959]: <info> [1486559405.1146] device (enp3s0): state change: prepare -> config (reason 'none') [40 50 0]
2 月 08 21:10:05 linux-bg4a NetworkManager[959]: <info> [1486559405.1149] device (enp3s0): state change: config -> ip-config (reason 'none') [50 70 0]
2 月 08 21:10:05 linux-bg4a NetworkManager[959]: <info> [1486559405.1151] dhcp4 (enp3s0): activation: beginning transaction (timeout in 45 seconds)
2 月 08 21:10:05 linux-bg4a kernel: r8169 0000:03:00.0 enp3s0: link down
2 月 08 21:10:05 linux-bg4a kernel: r8169 0000:03:00.0 enp3s0: link down
2 月 08 21:10:05 linux-bg4a kernel: IPv6: ADDRCONF(NETDEV_UP): enp3s0: link is not ready
2 月 08 21:10:05 linux-bg4a NetworkManager[959]: <info> [1486559405.1161] dhcp4 (enp3s0): dhclient started with pid 4006
2 月 08 21:10:07 linux-bg4a NetworkManager[959]: <info> [1486559407.3168] device (enp3s0): link connected
2 月 08 21:10:07 linux-bg4a kernel: r8169 0000:03:00.0 enp3s0: link up
2 月 08 21:10:50 linux-bg4a NetworkManager[959]: <warn> [1486559450.5580] dhcp4 (enp3s0): request timed out
2 月 08 21:10:50 linux-bg4a NetworkManager[959]: <info> [1486559450.5580] dhcp4 (enp3s0): state changed unknown -> timeout
2 月 08 21:10:50 linux-bg4a NetworkManager[959]: <info> [1486559450.5739] dhcp4 (enp3s0): canceled DHCP transaction, DHCP client pid 4006
2 月 08 21:10:50 linux-bg4a NetworkManager[959]: <info> [1486559450.5739] dhcp4 (enp3s0): state changed timeout -> done
2 月 08 21:10:50 linux-bg4a NetworkManager[959]: <info> [1486559450.5741] device (enp3s0): state change: ip-config -> failed (reason 'ip-config-unavailable') [70 120 5]
2 月 08 21:10:50 linux-bg4a NetworkManager[959]: <info> [1486559450.5742] manager: NetworkManager state is now DISCONNECTED
2 月 08 21:10:50 linux-bg4a NetworkManager[959]: <warn> [1486559450.5744] device (enp3s0): Activation: failed for connection 'Wired connection 1'
2 月 08 21:10:50 linux-bg4a NetworkManager[959]: <info> [1486559450.5747] device (enp3s0): state change: failed -> disconnected (reason 'none') [120 30 0]
2 月 08 21:10:50 linux-bg4a NetworkManager[959]: <info> [1486559450.5922] device (enp3s0): set-hw-addr: reset MAC address to 1C:87:2C:42:B1:0D (deactivate)
2 月 08 21:10:50 linux-bg4a NetworkManager[959]: <info> [1486559450.6390] device (enp3s0): state change: disconnected -> unavailable (reason 'carrier-changed') [30 20 40]
2 月 08 21:10:50 linux-bg4a kernel: r8169 0000:03:00.0 enp3s0: link down
2 月 08 21:10:50 linux-bg4a kernel: r8169 0000:03:00.0 enp3s0: link down
2 月 08 21:10:50 linux-bg4a kernel: IPv6: ADDRCONF(NETDEV_UP): enp3s0: link is not ready
2 月 08 21:10:55 linux-bg4a NetworkManager[959]: <info> [1486559455.3113] device (enp3s0): link connected
2 月 08 21:10:55 linux-bg4a kernel: r8169 0000:03:00.0 enp3s0: link up
2 月 08 21:10:55 linux-bg4a kernel: IPv6: ADDRCONF(NETDEV_CHANGE): enp3s0: link becomes ready
2 月 08 21:10:55 linux-bg4a NetworkManager[959]: <info> [1486559455.3116] device (enp3s0): state change: unavailable -> disconnected (reason 'carrier-changed') [20 30 40]
2 月 08 21:10:55 linux-bg4a NetworkManager[959]: <info> [1486559455.3120] policy: auto-activating connection 'Wired connection 1'
2 月 08 21:10:55 linux-bg4a NetworkManager[959]: <info> [1486559455.3129] device (enp3s0): Activation: starting connection 'Wired connection 1' (e9a1fbbf-00b7-3506-ba44-7152c8f7e5f2)
2 月 08 21:10:55 linux-bg4a NetworkManager[959]: <info> [1486559455.3131] device (enp3s0): state change: disconnected -> prepare (reason 'none') [30 40 0]
2 月 08 21:10:55 linux-bg4a NetworkManager[959]: <info> [1486559455.3132] manager: NetworkManager state is now CONNECTING
2 月 08 21:10:55 linux-bg4a NetworkManager[959]: <info> [1486559455.3324] device (enp3s0): set-hw-addr: set-cloned MAC address to B6:39:77:ED:A3:C5 (B6:39:77:ED:A3:C5)
2 月 08 21:10:55 linux-bg4a NetworkManager[959]: <info> [1486559455.3785] device (enp3s0): state change: prepare -> config (reason 'none') [40 50 0]
2 月 08 21:10:55 linux-bg4a NetworkManager[959]: <info> [1486559455.3787] device (enp3s0): state change: config -> ip-config (reason 'none') [50 70 0]
2 月 08 21:10:55 linux-bg4a NetworkManager[959]: <info> [1486559455.3789] dhcp4 (enp3s0): activation: beginning transaction (timeout in 45 seconds)
2 月 08 21:10:55 linux-bg4a kernel: r8169 0000:03:00.0 enp3s0: link down
2 月 08 21:10:55 linux-bg4a kernel: r8169 0000:03:00.0 enp3s0: link down
2 月 08 21:10:55 linux-bg4a kernel: IPv6: ADDRCONF(NETDEV_UP): enp3s0: link is not ready
2 月 08 21:10:55 linux-bg4a NetworkManager[959]: <info> [1486559455.3798] dhcp4 (enp3s0): dhclient started with pid 4045
2 月 08 21:10:59 linux-bg4a NetworkManager[959]: <info> [1486559459.5551] device (enp3s0): state change: ip-config -> unavailable (reason 'carrier-changed') [70 20 40]
2 月 08 21:10:59 linux-bg4a NetworkManager[959]: <info> [1486559459.5871] dhcp4 (enp3s0): canceled DHCP transaction, DHCP client pid 4045
2 月 08 21:10:59 linux-bg4a NetworkManager[959]: <info> [1486559459.5871] dhcp4 (enp3s0): state changed unknown -> done
2 月 08 21:10:59 linux-bg4a NetworkManager[959]: <info> [1486559459.6121] device (enp3s0): set-hw-addr: reset MAC address to 1C:87:2C:42:B1:0D (deactivate)
2 月 08 21:10:59 linux-bg4a NetworkManager[959]: <info> [1486559459.6585] manager: NetworkManager state is now DISCONNECTED
2 月 08 21:10:59 linux-bg4a kernel: r8169 0000:03:00.0 enp3s0: link down
2 月 08 21:11:01 linux-bg4a NetworkManager[959]: <info> [1486559461.8540] device (enp3s0): link connected
2 月 08 21:11:01 linux-bg4a NetworkManager[959]: <info> [1486559461.8544] device (enp3s0): state change: unavailable -> disconnected (reason 'carrier-changed') [20 30 40]
2 月 08 21:11:01 linux-bg4a NetworkManager[959]: <info> [1486559461.8549] policy: auto-activating connection 'Wired connection 1'
2 月 08 21:11:01 linux-bg4a NetworkManager[959]: <info> [1486559461.8553] device (enp3s0): Activation: starting connection 'Wired connection 1' (e9a1fbbf-00b7-3506-ba44-7152c8f7e5f2)
2 月 08 21:11:01 linux-bg4a NetworkManager[959]: <info> [1486559461.8554] device (enp3s0): state change: disconnected -> prepare (reason 'none') [30 40 0]
2 月 08 21:11:01 linux-bg4a kernel: r8169 0000:03:00.0 enp3s0: link up
2 月 08 21:11:01 linux-bg4a NetworkManager[959]: <info> [1486559461.8555] manager: NetworkManager state is now CONNECTING
2 月 08 21:11:01 linux-bg4a NetworkManager[959]: <info> [1486559461.8803] device (enp3s0): set-hw-addr: set-cloned MAC address to B6:39:77:ED:A3:C5 (B6:39:77:ED:A3:C5)
2 月 08 21:11:01 linux-bg4a NetworkManager[959]: <info> [1486559461.9266] device (enp3s0): state change: prepare -> config (reason 'none') [40 50 0]
2 月 08 21:11:01 linux-bg4a NetworkManager[959]: <info> [1486559461.9269] device (enp3s0): state change: config -> ip-config (reason 'none') [50 70 0]
2 月 08 21:11:01 linux-bg4a NetworkManager[959]: <info> [1486559461.9272] dhcp4 (enp3s0): activation: beginning transaction (timeout in 45 seconds)
2 月 08 21:11:01 linux-bg4a kernel: r8169 0000:03:00.0 enp3s0: link down
2 月 08 21:11:01 linux-bg4a kernel: r8169 0000:03:00.0 enp3s0: link down
2 月 08 21:11:01 linux-bg4a kernel: IPv6: ADDRCONF(NETDEV_UP): enp3s0: link is not ready
2 月 08 21:11:01 linux-bg4a NetworkManager[959]: <info> [1486559461.9283] dhcp4 (enp3s0): dhclient started with pid 4054
2 月 08 21:11:06 linux-bg4a NetworkManager[959]: <info> [1486559466.5556] device (enp3s0): state change: ip-config -> unavailable (reason 'carrier-changed') [70 20 40]
2 月 08 21:11:06 linux-bg4a NetworkManager[959]: <info> [1486559466.5877] dhcp4 (enp3s0): canceled DHCP transaction, DHCP client pid 4054
2 月 08 21:11:06 linux-bg4a NetworkManager[959]: <info> [1486559466.5877] dhcp4 (enp3s0): state changed unknown -> done
2 月 08 21:11:06 linux-bg4a NetworkManager[959]: <info> [1486559466.6081] device (enp3s0): set-hw-addr: reset MAC address to 1C:87:2C:42:B1:0D (deactivate)
2 月 08 21:11:06 linux-bg4a NetworkManager[959]: <info> [1486559466.6546] manager: NetworkManager state is now DISCONNECTED
2 月 08 21:11:06 linux-bg4a kernel: r8169 0000:03:00.0 enp3s0: link down