網絡組是centos7上新出的一個技術，它的作用和bonding類似，是將多個網卡聚合在一起方法，從而實現冗錯和提高吞吐量，不同於舊版中bonding技術，網路組提供更好的性能和擴展性，它是由內核驅動和teamd守護進程實現。
網路組可以工作在多種方式(runner)
broadcast
roundrobin
activebackup
loadbalance
lacp (implements the 802.3ad Link Aggregation Control Protocol)

實驗環境：
一臺CentOS7主機，網卡2塊。

創建網絡組

1.創建網路網

[[email protected] ~]# nmcli connection add con-name team0 ifname team0 type team ipv4.method manual ipv4.addresses 192.168.172.100 config ‘{"runner":{"name":"loadbalance"}}‘
Connection ‘team0‘ (24db0099-b9fa-4aae-ace0-9421e3c69278) successfully added.

2.添加物理網卡
分別將ens33和ens37添加至網路組內

[[email protected] ~]# nmcli connection add con-name team0-ens33 ifname ens33 type team-slave master team0
Connection ‘team0-ens33‘ (0d00650a-e379-4c70-9f62-ba268af1a208) successfully added.
[[email protected] ~]# nmcli connection add con-name team0-ens37 ifname ens37 type team-slave master team0
Connection ‘team0-ens37‘ (2916ab1f-2e3c-477b-aaaf-52dfaecaaeb7) successfully added.
 

3.將物理網卡和網絡組關聯起來

#由於剛才只是將物理網卡添加至網絡組內，所以此時team0-ens33和team0-ens37並未啟用
[[email protected] ~]# nmcli connection
NAME                UUID                                  TYPE      DEVICE 
ens33               fca2f13f-7310-4595-bbb1-e6d0e3662aff  ethernet  ens33  
team0               24db0099-b9fa-4aae-ace0-9421e3c69278  team      team0  
virbr0              803d85ba-4e80-470f-bcf5-1b22b5653026  bridge    virbr0 
Wired connection 1  3f019cd5-7685-3368-960c-101e35cd6ce7  ethernet  ens37  
team0-ens33         0d00650a-e379-4c70-9f62-ba268af1a208  ethernet  --     
team0-ens37         2916ab1f-2e3c-477b-aaaf-52dfaecaaeb7  ethernet  --   
#將網絡組內的物理網卡關聯起來
[[email protected] ~]# nmcli connection up team0-ens33
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/7)
[[email protected] ~]# nmcli connection up team0-ens37
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/8)
#此時team-ens33和team-ens37都已經啟用，網絡組創建成功
[[email protected] ~]# nmcli connection 
NAME                UUID                                  TYPE      DEVICE 
team0               24db0099-b9fa-4aae-ace0-9421e3c69278  team      team0  
team0-ens33         0d00650a-e379-4c70-9f62-ba268af1a208  ethernet  ens33  
team0-ens37         2916ab1f-2e3c-477b-aaaf-52dfaecaaeb7  ethernet  ens37  
virbr0              803d85ba-4e80-470f-bcf5-1b22b5653026  bridge    virbr0 
ens33               fca2f13f-7310-4595-bbb1-e6d0e3662aff  ethernet  --     
Wired connection 1  3f019cd5-7685-3368-960c-101e35cd6ce7  ethernet  --   
 

4.查看網絡組狀態

[[email protected] ~]# teamdctl team0 state
setup:
  runner: loadbalance
ports:
  ens33
    link watches:
      link summary: up
      instance[link_watch_0]:
        name: ethtool
        link: up
        down count: 0
  ens37
    link watches:
      link summary: up
      instance[link_watch_0]:
        name: ethtool
        link: up
        down count: 0

網絡組的刪除

1.刪除相關配置文件
由於nmcli命令在執行時會自動生成網卡的配置文件，所以刪除網路組時需要將相應的配置文件進行刪除

[[email protected] ~]# rm -vf /etc/sysconfig/network-scripts/ifcfg-team0*
removed ‘/etc/sysconfig/network-scripts/ifcfg-team0’
removed ‘/etc/sysconfig/network-scripts/ifcfg-team0-ens33’
removed ‘/etc/sysconfig/network-scripts/ifcfg-team0-ens37’

2.取消相關網卡的關聯

#將網絡組中的ens33及ens37取消關聯
[[email protected] ~]# nmcli connection down team0-ens33
Connection ‘team0-ens33‘ successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/7)
[[email protected] ~]# nmcli connection down team0-ens37
Connection ‘team0-ens37‘ successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/8)
#刪除鏈接ens33和ens37
[[email protected] ~]# nmcli connection delete team0-ens33
Connection ‘team0-ens33‘ (0d00650a-e379-4c70-9f62-ba268af1a208) successfully deleted.
[[email protected] ~]# nmcli connection delete team0-ens37
Connection ‘team0-ens37‘ (2916ab1f-2e3c-477b-aaaf-52dfaecaaeb7) successfully deleted.

3.將網路組刪除

#先禁用網路組
[[email protected] ~]# nmcli connection down team0 
Connection ‘team0‘ successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/6)
#將網路組刪除
[[email protected] ~]# nmcli connection delete team0 
Connection ‘team0‘ (24db0099-b9fa-4aae-ace0-9421e3c69278) successfully deleted.

此時網路組已經從主機上刪除

[[email protected] ~]# nmcli connection 
NAME                UUID                                  TYPE      DEVICE 
ens33               fca2f13f-7310-4595-bbb1-e6d0e3662aff  ethernet  ens33  
virbr0              803d85ba-4e80-470f-bcf5-1b22b5653026  bridge    virbr0 
Wired connection 1  3f019cd5-7685-3368-960c-101e35cd6ce7  ethernet  ens37  

網絡組相關實驗