题目要求：配置链路聚合
在 server0 和 desktop0 之间按以下要求配置链路聚合
- l 此链路使用接口 eth1 和 eth2
- l 此链路在一个接口失效后，仍然能工作
- l 此链路在 server0 上使用地址 192.168.0.11/24
- l 此链路在 desktop0 上使用地址 192.168.0.10/24
- l 此链路在系统重启后依然保持正常状态
知识点小贴士：
Linux 链路聚合：链路聚合与双网卡绑定几乎相同，可以实现多网卡绑定主从荣誉，负载均衡，提高网络访问流量。但链路聚合与双网卡绑定技术（bond）不同点就在于，双网卡绑定只能使用两个网卡绑定，而链路聚合最多可将8个网卡汇聚同时做绑定，此聚合模式称之为team。默认情况下NetworkManager程序中集成了teamd功能就来配置链路聚合。
team 四种模式
- 广播容错："broadcast"
- 平衡轮询："roundrobin"
- 主备："activebackup"
- 负载均衡："loadbalance"
解题步骤：
（1）首先在desktop0上查找可复制的帮助命令及参考例子：由于nmcli 下的命令都比较长，所以我们不用死记，新版里的帮助和命令参数的tab补全特别好用，可以帮助我们搞定记不住的东西，通过man nmcli-examples查看和复制：
man nmcli-examples
<code>[root@desktop0 ~]# man -k nmcli
nmcli (1) - command - line tool for controlling ...
nmcli-examples (5) - usage examples of nmcli/<code>
<code>[root@desktop0 ~]# man nmcli-examples | grep team | grep \\\\$
<standard>:183: warning [p 2, 7.7i]: can't break line
$ nmcli con add type team con-name Team1 ifname Team1 config team1-master-json.conf
$ nmcli con add type team-slave con-name Team1-slave1 ifname em1 master Team1
$ nmcli con add type team-slave con-name Team1-slave2 ifname em2 master Team1/<standard>/<code>
<code>[root@desktop0 ~]# man teamd.conf | grep backup
activebackup — Watches for link changes and
Default for activebackup runner: 1
Default for activebackup runner: 1
"runner": {"name": "activebackup"},
This configuration uses active-backup runner with
"runner": {"name": "activebackup"},
"runner": {"name": "activebackup"},
"runner": {"name": "activebackup"},/<code>
（2）复制上述命令，在Server0上修改相关配置，补全内容即可：
第一步：teamed的配置
<code> [root@server0 ~]# nmcli con add type team con-name Team1 ifname Team1 config '{"runner": {"name": "activebackup"}}'
Connection 'Team1' (ce8cdd24-03a9-4bfe-9c35-900b14c0f279) successfully added.
[root@server0 ~]# nmcli con add type team-slave con-name Team1-slave1 ifname eth1 master Team1
Connection 'Team1-slave1' (465600d7-8aa2-4e2c-b6f6-d5d9b8138d07) successfully added.
[root@server0 ~]# nmcli con add type team-slave con-name Team1-slave2 ifname eth2 master Team1
Connection 'Team1-slave2' (e4908548-7eef-44bf-a83b-bbacb13cf179) successfully added./<code>第二步：为Team1接口配置IP地址
<code>[root@server0 ~]# nmcli connection modify Team1 ipv4.method manual ipv4.addresses 192.168.0.11/24 connection.autoconnect true
[root@server0 ~]# systemctl restart network/<code>
（3）查看验证验证Server0的配置：
<code>[root@server0 ~]# teamdctl Team1 state
setup:
runner: activebackup
ports:
eth1
link watches:
link summary: up
instance[link_watch_0]:
name: ethtool
link: up
eth2
link watches:
link summary: up
instance[link_watch_0]:
name: ethtool
link: up
runner:
active port: eth1/<code>
<code>[root@server0 ~]# ping -c 3 192.168.0.11
PING 192.168.0.11 (192.168.0.11) 56(84) bytes of data.
64 bytes from 192.168.0.11: icmp_seq=1 ttl=64 time=0.050 ms
64 bytes from 192.168.0.11: icmp_seq=2 ttl=64 time=0.107 ms
64 bytes from 192.168.0.11: icmp_seq=3 ttl=64 time=0.056 ms
--- 192.168.0.11 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 0.050/0.071/0.107/0.025 ms/<code>
（4）在Desktop0上重复上述操作配置
<code>[root@desktop0 ~]# nmcli con add type team con-name Team1 ifname Team1 config '{"runner": {"name": "activebackup"}}'
Connection 'Team1' (98692ec9-67b3-4757-a4e1-3a274e0d3199) successfully added.
[root@desktop0 ~]# nmcli con add type team-slave con-name Team1-slave1 ifname eth1 master Team1
Connection 'Team1-slave1' (9b76c92d-1454-43d0-9684-42a2814036c1) successfully added.
[root@desktop0 ~]# nmcli con add type team-slave con-name Team1-slave2 ifname eth2 master Team1
Connection 'Team1-slave2' (dfa79ef3-4ac0-41e0-9f82-d433a84f3580) successfully added.
[root@desktop0 ~]# nmcli connection modify Team1 ipv4.method manual ipv4.addresses 192.168.0.10/24 connection.autoconnect true/<code>（5）查看验证验证Desktop0的配置：
<code>[root@desktop0 ~]# systemctl restart network
[root@desktop0 ~]# teamdctl Team1 state
setup:
runner: activebackup
ports:
eth1
link watches:
link summary: up
instance[link_watch_0]:
name: ethtool
link: up
eth2
link watches:
link summary: up
instance[link_watch_0]:
name: ethtool
link: up
runner:
active port: eth1
[root@desktop0 ~]# ping -c 3 192.168.0.10
PING 192.168.0.10 (192.168.0.10) 56(84) bytes of data.
64 bytes from 192.168.0.10: icmp_seq=1 ttl=64 time=0.043 ms
64 bytes from 192.168.0.10: icmp_seq=2 ttl=64 time=0.126 ms
64 bytes from 192.168.0.10: icmp_seq=3 ttl=64 time=0.407 ms
--- 192.168.0.10 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 0.043/0.192/0.407/0.155 ms/<code>
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