我有一台运行CoreOS的服务器，而且我通过DHCPconfiguration的主networking接口获得了一个载体，并且是可路由的，但从不离开configuring状态。 这会导致systemd-networkd-wait-online.service失败。 查看systemd-networkd.service的日志文件，我看到了接口获取载体的位置，但是我看不到任何错误消息，这些错误信息可以帮助我找出为什么它处于configuring状态。 任何关于如何debugging的build议？
以下是一些相关的细节：
core@server ~ $ networkctl IDX LINK TYPE OPERATIONAL SETUP 1 lo loopback carrier configured 2 enp0s25 ether routable configuring 3 docker0 ether no-carrier configured 3 links listed. core@server ~ $ networkctl status enp0s25 ● 2: enp0s25 Link File: /usr/lib64/systemd/network/99-default.link Network File: /usr/lib64/systemd/network/zz-default.network Type: ether State: routable (configuring) Path: pci-0000:00:19.0 Driver: e1000e Vendor: Intel Corporation Model: Ethernet Connection (3) I218-V HW Address: b8:ae:ed:76:f9:cd (Elitegroup Computer Systems Co., Ltd.) Address: 10.20.1.10 fe80::baae:edff:fe76:f9cd Gateway: 10.20.1.1 (ADI Engineering, Inc.) DNS: 8.8.8.8 8.8.4.4 Search Domains: localdomain core@server ~ $ journalctl -r -u systemd-networkd -- Logs begin at Sat 2016-08-06 23:23:32 UTC, end at Sat 2016-10-08 17:29:00 UTC. -- Oct 08 17:03:41 nm-nuc systemd-networkd[1209]: enp0s25: DHCPv4 address 10.20.1.10/24 via 10.20.1.1 Oct 08 17:03:41 nm-nuc systemd-networkd[1209]: enp0s25: Gained carrier Oct 08 17:03:41 nm-nuc systemd-networkd[1209]: docker0: Could not set bridge vlan: Operation not permitted Oct 08 17:03:41 nm-nuc systemd-networkd[1209]: docker0: Failed to assign VLANs to bridge port: Operation not permitted Oct 08 17:03:41 nm-nuc systemd-networkd[1209]: docker0: Could not append VLANs: Operation not permitted Oct 08 17:03:41 nm-nuc systemd-networkd[1209]: docker0: IPv6 enabled for interface: Success Oct 08 17:03:38 nm-nuc systemd[1]: Started Network Service. Oct 08 17:03:38 nm-nuc systemd-networkd[1209]: lo: Configured Oct 08 17:03:38 nm-nuc systemd-networkd[1209]: enp0s25: IPv6 enabled for interface: Success Oct 08 17:03:38 nm-nuc systemd-networkd[1209]: Enumeration completed Oct 08 17:03:38 nm-nuc systemd[1]: Starting Network Service... Oct 08 17:03:36 localhost systemd[1]: Stopped Network Service. Oct 08 17:03:36 localhost systemd-networkd[350]: lo: Lost carrier Oct 08 17:03:36 localhost systemd[1]: Stopping Network Service... Oct 08 17:03:35 localhost systemd-networkd[350]: lo: Configured Oct 08 17:03:35 localhost systemd-networkd[350]: eth0: IPv6 enabled for interface: Success Oct 08 17:03:35 localhost systemd[1]: Started Network Service. Oct 08 17:03:35 localhost systemd-networkd[350]: Enumeration completed Oct 08 17:03:35 localhost systemd[1]: Starting Network Service...