• Centos8 nmcli 创建网桥


    Centos8 nmcli 创建网桥

    在centos8 上取消了常用的网桥管工具来brctl,基本网络相关的配置信息全部可以通过nmcli 来实现,下面介绍在centos8 上对网桥的相关使用;

    1、基本介绍:

    [root@localhost ~]# nmcli --help

    Usage: nmcli [OPTIONS] OBJECT { COMMAND | help }

    OPTIONS

      -a, --ask                                ask for missing parameters

      -c, --colors auto|yes|no                 whether to use colors in output

      -e, --escape yes|no                      escape columns separators in values

      -f, --fields <field,...>|all|common      specify fields to output

      -g, --get-values <field,...>|all|common  shortcut for -m tabular -t -f

      -h, --help                               print this help

      -m, --mode tabular|multiline             output mode

      -o, --overview                           overview mode

      -p, --pretty                             pretty output

      -s, --show-secrets                       allow displaying passwords

      -t, --terse                              terse output

      -v, --version                            show program version

          -w, --wait <seconds>                     set timeout waiting for finishing operations

    OBJECT

      g[eneral]       NetworkManager's general status and operations

      n[etworking]    overall networking control

      r[adio]         NetworkManager radio switches

      c[onnection]    NetworkManager's connections

      d[evice]        devices managed by NetworkManager

      a[gent]         NetworkManager secret agent or polkit agent

      m[onitor]       monitor NetworkManager changes

    2、创建网桥

    [root@localhost ~]# nmcli c add type bridge ifname br0 con-name br0

    Connection 'br0' (7b309691-5b24-42ab-bb8c-5e1cc24eafbd) successfully added.

    上面参数命令的解释:

    type : 类型,常用的vxlan,vlan,bridge,bridge-slave等,用来定义设备的类型;

    ifname:设备名字;

    con-name : 连接名称;

    创建完成后我们查看下网桥是否创建成功,

    [root@localhost ~]# nmcli c

    NAME        UUID                                  TYPE      DEVICE

    bridge-br0  f5f43513-ba3f-49dc-a6a6-ad96e3b4bfc4  bridge    br0

    eno4        d855cbac-278b-44c3-8ae6-05b6f9a44a1e  ethernet  eno4

    eno1        9b2dabf2-c1d3-4479-bd7b-9dc56ff426a7  ethernet  --

    eno2        2cb32179-6b65-4876-be77-b43ff9fad039  ethernet  --

    eno3        dbd7996f-a932-4e9c-b5d2-6174653eaf23  ethernet  --

    ens47f0     c5f2fd97-78e7-48c0-ad72-3015d542dca0  ethernet  --

    ens47f1     8ef8d139-a398-43c8-ab3c-c28a179bba11  ethernet  --添加接口

    [root@localhost ~]# nmcli c add type bridge-slave ifname ens47f1 master br0

    Connection 'bridge-slave-ae58-ebf3b38afbae) successfully added.

    这里的参数基本与之前的一致,注意设置类型即可,ifname 是需要添加到桥的接口名;

    当接口添加完成后我们可以查看下简单的连接信息,如:

    [root@localhost ~]# nmcli c

    NAME                  UUID                                  TYPE      DEVICE

    eno4                  d855cbac-278b-44c3-8ae6-05b6f9a44a1e  ethernet  eno4

    br0                   f5f43513-ba3f-49dc-a6a6-ad96e3b4bfc4  bridge    br0

    bridge-slave-ens47f1  7a2a9e70-7a49-4e8f-9f14-e5b4811cb5a5  ethernet  ens47f1

    vnet0                 f97493c4-b6d1-4efc-a1fd-7562dddf3753  tun       vnet0

    eno1                  9b2dabf2-c1d3-4479-bd7b-9dc56ff426a7  ethernet  --

    eno2                  2cb32179-6b65-4876-be77-b43ff9fad039  ethernet  --

    eno3                  dbd7996f-a932-4e9c-b5d2-6174653eaf23  ethernet  --

    ens47f0               c5f2fd97-78e7-48c0-ad72-3015d542dca0  ethernet  --

    ens47f1               8ef8d139-a398-43c8-ab3c-c28a179bba11  ethernet  --

    当看具体的信息的时候可以添加show 参数,如:

    [root@localhost ~]# nmcli c show bridge-slave-ens47f1

    connection.id:                          bridge-slave-ens47f1

    connection.uuid:                        7a2a9e70-7a49-4e8f-9f14-e5b4811cb5a5

    connection.stable-id:                   --

    connection.type:                        802-3-ethernet

    connection.interface-name:              ens47f1

    connection.autoconnect:                 yes

    connection.autoconnect-priority:        0

    connection.autoconnect-retries:         -1 (default)

    connection.multi-connect:               0 (default)

    connection.auth-retries:                -1

    connection.timestamp:                   1589364882

    connection.read-only:                   no

    connection.permissions:                 --

    connection.zone:                        --

    connection.master:                      br0

    connection.slave-type:                  bridge

    connection.autoconnect-slaves:          -1 (default)

    connection.secondaries:                 --

    connection.gateway-ping-timeout:        0

    connection.metered:                     unknown

    connection.lldp:                        default

    connection.mdns:                        -1 (default)

    connection.llmnr:                       -1 (default)

    connection.wait-device-timeout:         -1

    802-3-ethernet.port:                    --

    802-3-ethernet.speed:                   0

    802-3-ethernet.duplex:                  --

    802-3-ethernet.auto-negotiate:          no

    802-3-ethernet.mac-address:             --

    802-3-ethernet.cloned-mac-address:      --

    802-3-ethernet.generate-mac-address-mask:--

    802-3-ethernet.mac-address-blacklist:   --

    802-3-ethernet.mtu:                     auto

    802-3-ethernet.s390-subchannels:        --

    802-3-ethernet.s390-nettype:            --

    802-3-ethernet.s390-options:            --

    802-3-ethernet.wake-on-lan:             default

    802-3-ethernet.wake-on-lan-password:    --

    bridge-port.priority:                   32

    bridge-port.path-cost:                  100

    bridge-port.hairpin-mode:               no

    bridge-port.vlans:                      --

    GENERAL.NAME:                           bridge-slave-ens47f1

    GENERAL.UUID:                           7a2a9e70-7a49-4e8f-9f14-e5b4811cb5a5

    GENERAL.DEVICES:                        ens47f1

    GENERAL.STATE:                          activated

    GENERAL.DEFAULT:                        no

    GENERAL.DEFAULT6:                       no

    GENERAL.SPEC-OBJECT:                    --

    GENERAL.VPN:                            no

    GENERAL.DBUS-PATH:                      /org/freedesktop/NetworkManager/ActiveConnection/123

    GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/Settings/28

    GENERAL.ZONE:                           --

    GENERAL.MASTER-PATH:                    /org/freedesktop/NetworkManager/Devices/20

    IP4.GATEWAY:                            --

    IP6.GATEWAY:                            --

    3、启动网桥

    [root@localhost ~]# nmcli c up br0

    Connection successfully activated (master waiting for slaves) (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/89)

    查看下启动后的情况:

    [root@localhost ~]# nmcli c show

    NAME                  UUID                                  TYPE      DEVICE

    eno4                  d855cbac-278b-44c3-8ae6-05b6f9a44a1e  ethernet  eno4

    br0                   f5f43513-ba3f-49dc-a6a6-ad96e3b4bfc4  bridge    br0

    bridge-slave-ens47f1  7a2a9e70-7a49-4e8f-9f14-e5b4811cb5a5  ethernet  ens47f1

    eno1                  9b2dabf2-c1d3-4479-bd7b-9dc56ff426a7  ethernet  --

    eno2                  2cb32179-6b65-4876-be77-b43ff9fad039  ethernet  --

    eno3                  dbd7996f-a932-4e9c-b5d2-6174653eaf23  ethernet  --

    ens47f0               c5f2fd97-78e7-48c0-ad72-3015d542dca0  ethernet  --

    ens47f1               8ef8d139-a398-43c8-ab3c-c28a179bba11  ethernet  --

    4、相关参数修改:

    1、修网桥的IP形式为手动;

    [root@centos111 ~]# nmcli c modify br0 ipv4.method manual

    如果不修改,那么桥会自动取IP,取不到状态将错误,导致网桥无法使用;

    2、设置bridge 的IP信息;

    [root@centos111 ~]# nmcli c modify br0 ipv4.addresses 192.168.1.111/24

    3、设置网桥自动连接;

    [root@centos111 ~]# nmcli c modify br0 autoconnect yes

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  • 原文地址:https://www.cnblogs.com/juzib/p/12888025.html
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