CentOS7的聚合鏈路

1、環境介紹

[root@rhcc ~]# cat /etc/redhat-release 
CentOS Linux release 7.5.1804 (Core) 
ENERAL.DEVICE:                         ens37
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         00:0C:29:04:8C:9B
192.168.137.128/24
192.168.137.0/24
192.168.137.1

GENERAL.DEVICE:                         ens38
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         00:0C:29:04:8C:A5
192.168.137.129/24
192.168.137.1
因為是在虛擬機中進行的實驗只能進行高可用測試
聚合鏈路的幾種模式：
broadcast 傳輸所有端口進來的數據包
roundrobin 隨機計算發送數據（輪詢）
activebackup  高可用性
loadbalance 負載均衡
josn的配置{"runner": {"name":"activebackup"}} ##模式修改只需修改這個格式中的name字段的值

2、幾種做聚合鏈路的方式
2.1 圖形化

[root@rhcc ~]# nmtui-edit

JSON配置模式在team0這個虛擬網卡里配置
配置完成后重啟網卡

[root@rhcc ~]# systemctl restart network
[root@rhcc ~]# ip a
---
5: ens37: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master team0 state UP group default qlen 1000
    link/ether 00:0c:29:04:8c:9b brd ff:ff:ff:ff:ff:ff
6: ens38: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master team0 state UP group default qlen 1000
    link/ether 00:0c:29:04:8c:9b brd ff:ff:ff:ff:ff:ff
10: team0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 00:0c:29:04:8c:9b brd ff:ff:ff:ff:ff:ff
    inet 192.168.137.128/24 brd 192.168.137.255 scope global noprefixroute team0
       valid_lft forever preferred_lft forever
    inet6 fe80::f39f:f544:b69f:48db/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
---

2.2 命令行

第一種
[root@rhcc ~]# man nmcli-examples
找到以下照着模板抄
           $ nmcli con add type team con-name Team1 ifname Team1 config team1-ma
ster-json.conf
           $ nmcli con add type ethernet con-name Team1-slave1 ifname em1 master
 Team1
           $ nmcli con add type ethernet con-name Team1-slave2 ifname em2 master
 Team1
這是我本地的網卡名稱
ens37:  link/ether 00:0c:29:04:8c:9b
ens38:  link/ether 00:0c:29:04:8c:a5

[root@rhcc ~]# nmcli con add type team con-name Team1 ifname Team1 config '{"runner":{"name":"activebackup"}}'
[root@rhcc ~]# nmcli con add type ethernet con-name Team1-slave1 ifname ens37 master Team1
[root@rhcc ~]# nmcli con add type ethernet con-name Team1-slave2 ifname ens38 master Team1

第二種
[root@rhcc 1]# pwd
/usr/share/doc/teamd-1.27/example_ifcfgs/1
[root@rhcc 1]# ls
ifcfg-eth1  ifcfg-eth2  ifcfg-team_test0
這里是team的模板配置文件，直接復制到網卡的配置文件目錄修改修改
cd /etc/sysconfig/network-scripts/
   18  ls
   19  mv ifcfg-eth1 ifcfg-ens37
   20  mv ifcfg-eth2 ifcfg-ens38
   21  vim ifcfg-ens37
   22  vim ifcfg-ens38
   23  vim ifcfg-team_test0 
   24  systemctl restart network
[root@rhcc network-scripts]# cat ifcfg-ens37;cat ifcfg-ens38
DEVICE="ens37"
DEVICETYPE="TeamPort"
ONBOOT="yes"
TEAM_MASTER="team_test0"
DEVICE="ens38"
DEVICETYPE="TeamPort"
ONBOOT="yes"
TEAM_MASTER="team_test0"
[root@rhcc network-scripts]# cat ifcfg-team_test0 
DEVICE="team_test0"
DEVICETYPE="Team"
ONBOOT="yes"
BOOTPROTO=none
NETMASK=255.255.255.0
IPADDR=192.168.137.128
GATEWAY=192.168.137.1
TEAM_CONFIG='{"runner": {"name": "roundrobin"}}'

5: ens37: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master team_test0 state UP group default qlen 1000
    link/ether 00:0c:29:04:8c:9b brd ff:ff:ff:ff:ff:ff
6: ens38: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master team_test0 state UP group default qlen 1000
    link/ether 00:0c:29:04:8c:9b brd ff:ff:ff:ff:ff:ff
7: team_test0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 00:0c:29:04:8c:9b brd ff:ff:ff:ff:ff:ff
    inet 192.168.137.128/24 brd 192.168.137.255 scope global noprefixroute team_test0

3、總結
鏈路聚合主要是備份網卡，實現網卡交互工作，避免網卡單點故障，提高系統的可靠性。其中除了做熱備份（activebackup）連接冗余，其他的模式是需要交換機做[EtherChannel (PAgP and LACP) 以太通道]

簡書鏈接
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