DHCP IP 租用尝试通过以太网和 DHCP 失败，使用 netctl

Question

我的 DHCP 以太网在 Windows 中工作正常，但在带有netctl和dhcpcd. 我究竟做错了什么？

输出 ip link

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: wlp2s0: [...]
3:  eno1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether [my mac adress] brd ff:ff:ff:ff:ff:ff

我的netctl简介

$ cat /etc/netctl/dhcp
Description='ethernet dhcp'
Interface=eno1
Connection=ethernet
IP=dhcp
#IP6=dhcp
#IP6=stateless

之后的错误信息 sudo netctl start dhcp

$ sudo journalctl -xn
-- Logs begin at Fr 2013-12-27 13:25:36 CET, end at Mo 2014-01-13 12:45:22 CET. --
Jan 13 12:44:50 laptop2 network[697]: DHCP IP lease attempt failed on interface 'eno1'
Jan 13 12:44:50 laptop2 network[697]: Failed to bring the network up for profile 'dhcp'
Jan 13 12:44:50 laptop2 systemd[1]: netctl@dhcp.service: main process exited, code=exited, status=1/FAILURE
Jan 13 12:44:50
laptop2 systemd[1]: Failed to start Networking for netctl profile dhcp.

好的，所以它在启动网络时遇到了问题，我自己做...

$ sudo ip link set eno1 up
$ sudo netctl start dhcp
Job for netctl@dhcp.service failed. See 'systemctl status netctl@dhcp.service' and 'journalctl -xn' for details.
$ sudo journalctl -xn
[...]
Jan 13 12:47:20 laptop2 network[1304]: Starting network profile 'dhcp'...
Jan 13 12:47:20 laptop2 network[1304]: The interface of network profile 'dhcp' is already up
Jan 13 12:47:20 laptop2 systemd[1]: netctl@dhcp.service: main process exited, code=exited, status=1/FAILURE
Jan 13 12:47:20 laptop2 systemd[1]: Failed to start Networking for netctl profile dhcp.

这也无济于事，再次设置它。

$ sudo ip link set eno1 down

尝试与dhcpcd...

$ sudo systemctl start dhcpcd
$ ping www.google.de
connect: Network is unreachable
$ ip link
[...]
3: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
[...]
$ sudo systemctl stop dhcpcd

$ sudo netctl start dhcp
Job for netctl@dhcp.service failed. See 'systemctl status netctl@dhcp.service' and 'journalctl -xn' for details.

$ sudo journalctl -xn
-- Logs begin at Fr 2013-12-27 13:25:36 CET, end at Mo 2014-01-13 12:53:06 CET. --
Jan 13 12:52:36 laptop2 dhcpcd[1753]: version 6.1.0 starting
Jan 13 12:52:36 laptop2 dhcpcd[1753]: eno1: soliciting a DHCP lease
Jan 13 12:53:06 laptop2 dhcpcd[1753]: timed out
Jan 13 12:53:06 laptop2 dhcpcd[1753]: exited
Jan 13 12:53:06 laptop2 network[1707]: DHCP IP lease attempt failed on interface 'eno1'
Jan 13 12:53:06 laptop2 network[1707]: Failed to bring the network up for profile 'dhcp'
Jan 13 12:53:06 laptop2 systemd[1]: netctl@dhcp.service: main process exited, code=exited, status=1/FAILURE
Jan 13 12:53:06 laptop2 systemd[1]: Failed to start Networking for netctl profile dhcp.

在删除租约并重/var/lib/dhcpcd/dhcpcd-eno1.lease6试后，我仍然收到相同的错误消息。写TimeoutDHCP=40于/etc/netctl/hooks/timeout并使其还可以执行改变不了什么。

Answer 1

OP ( Konrad H\xc3\xb6ffner )在 Oct\xc2\xa021\xc2\xa0\xe2\x80\x9914 at\xc2\xa07:22 上发布了这个答案\在他的问题中：

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解决了

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网络电缆有缺陷。\xc2\xa0\n 我将其拔掉，它又可以工作了。

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