CentOS 7.1 Bridge启用STP报错"Master connection not found or invalid"

今天在公司测试Linux bridge搭建，为了使内部docker容器的网络能够不经过2层封装转发对外公布，顾试用一下bridge功能，结果碰到报错："Bringing up interface eno16777736:  Error: Connection activation failed: Master connection not found or invalid"

具体错误是：

Mar 16 10:56:04 cloud01 systemd[1]: Starting LSB: Bring up/down networking...
Mar 16 10:56:05 cloud01 network[876]: Bringing up loopback interface:  Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Mar 16 10:56:05 cloud01 network[876]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Mar 16 10:56:06 cloud01 network[876]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Mar 16 10:56:06 cloud01 network[876]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Mar 16 10:56:06 cloud01 network[876]: [  OK  ]
Mar 16 10:56:06 cloud01 network[876]: Bringing up interface eno16777736:  Error: Connection activation failed: Master connection not found or invalid
Mar 16 10:56:06 cloud01 network[876]: [FAILED]
Mar 16 10:56:06 cloud01 network[876]: Bringing up interface br0:  Could not load file '/etc/sysconfig/network-scripts/ifcfg-br0'
Mar 16 10:56:06 cloud01 network[876]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-br0'
Mar 16 10:56:14 cloud01 network[876]: Determining IP information for br0... failed; no link present.  Check cable?
Mar 16 10:56:14 cloud01 network[876]: [FAILED]
Mar 16 10:56:14 cloud01 systemd[1]: network.service: control process exited, code=exited status=1
Mar 16 10:56:14 cloud01 systemd[1]: Failed to start LSB: Bring up/down networking.
Mar 16 10:56:14 cloud01 systemd[1]: Unit network.service entered failed state.

经过一番google，得出答案是得禁用NetworkManager。

执行如下命令：

systemctl stop NetworkManager
systemctl disable NetworkManager

你可以选择重启，或者仅单单重启network服务即可修复。

启用后效果：

# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.000c295f4d67       yes             eno16777736

参考资料：

　　https://www.centos.org/forums/viewtopic.php?f=50&t=51000

本文到此结束，谢谢！