[转帖]Centos7/RHEL7双网卡绑定的方法

Centos7/RHEL7双网卡绑定的方法

https://www.jb51.net/article/125347.htm

改天尝试一下.

 

  本篇文章主要介绍了Centos7/RHEL7双网卡绑定的方法,小编觉得挺不错的,现在分享给大家,也给大家做个参考。一起跟随小编过来看看吧  

1. 简要

双网卡绑定技术在centos7中使用了teaming技术,而在rhel6/centos7中使用的是bonding技术,在centos7中双网卡绑定既能使用teaming也可以使用bonding,这里推荐使用teaming技术,方便与查看和监控。

2. 原理

这里介绍两种最常见的双网卡绑定模式:

        (1) roundrobin - 轮询模式

            所有链路处于负载均衡状态,这种模式的特点增加了带宽,同时支持容错能力。

        (2) activebackup - 主备模式

            一个网卡处于活动状态,另一个处于备份状态,所有流量都在主链路上处理,当活动网卡down掉时,启用备份网卡。

3. 基础环境

系统:centos7

在centos7中,关闭虚拟机添加网卡,再开启虚拟机,系统是不会自动生成网卡的配置文件:

[转帖]Centos7/RHEL7双网卡绑定的方法

在centos7中要生成网卡配置文件的方法很简单,使用如下命令:

?
1 2 3 4 5 6 7   # 查看物理网卡信息 [root@localhost ~]# nmcli dev DEVICE    TYPE   STATE   CONNECTION     eno16777736 ethernet connected eno16777736    eno33554984 ethernet connected Wired connection 1 eno50332208 ethernet connected Wired connection 2 lo      loopback unmanaged --

上面的信息可以看到,一共有四张网卡,其中lo是本地回环网卡,另外三张为物理网卡。

?
1 2 3 4 5 6   # 查看网卡连接信息 [root@localhost ~]# nmcli con sh NAME        UUID                 TYPE      DEVICE   Wired connection 2 9a1314bf-d273-406a-930a-dc4160dee4ec 802-3-ethernet eno50332208 Wired connection 1 47eef4a3-7fa4-4a73-83ef-1485bda9b950 802-3-ethernet eno33554984 eno16777736     51d00668-2cf5-41da-ad8d-5019d62e98ad 802-3-ethernet eno16777736

上面的信息可以查看到一共有3个连接,其中两个有线连接,表示没有设置过的网卡连接,还有一个enoxx连接。接下来要修改两个有线连接的命名方法,并生成网卡配置文件:

?
1 2 3 4 5   # 首先,删除两个无用的有线连接 [root@localhost ~]# nmcli con del 9a1314bf-d273-406a-930a-dc4160dee4ec Connection 'Wired connection 2' (9a1314bf-d273-406a-930a-dc4160dee4ec) successfully deleted. [root@localhost ~]# nmcli con del 47eef4a3-7fa4-4a73-83ef-1485bda9b950 Connection 'Wired connection 1' (47eef4a3-7fa4-4a73-83ef-1485bda9b950) successfully deleted.
?
1 2 3 4 5 6 # 再次创建新的连接并生成配置文件   [root@localhost ~]# nmcli conn add type ethernet con-name eno50332208 ifname eno50332208 Connection 'eno50332208' (eea2a115-63f8-4f33-be84-12559f02542c) successfully added. [root@localhost ~]# nmcli conn add type ethernet con-name eno33554984 ifname eno33554984 Connection 'eno33554984' (32d2389e-4e82-4419-9d18-5aff8f0be003) successfully added.
?
1 2 3 4 5 6 7 8 9 10 11 12 # 最后,查看下   [root@localhost ~]# nmcli con sh NAME     UUID                 TYPE      DEVICE   eno16777736 51d00668-2cf5-41da-ad8d-5019d62e98ad 802-3-ethernet eno16777736 eno33554984 32d2389e-4e82-4419-9d18-5aff8f0be003 802-3-ethernet eno33554984 eno50332208 eea2a115-63f8-4f33-be84-12559f02542c 802-3-ethernet eno50332208   [root@localhost ~]# ll /etc/sysconfig/network-scripts/ifcfg-eno* -rw-r--r--. 1 root root 394 Nov 26 05:59 /etc/sysconfig/network-scripts/ifcfg-eno16777736 -rw-r--r--. 1 root root 288 Dec 26 08:44 /etc/sysconfig/network-scripts/ifcfg-eno33554984 -rw-r--r--. 1 root root 288 Dec 26 08:44 /etc/sysconfig/network-scripts/ifcfg-eno50332208

网络连接和配置文件都成功生成了。 接下来通过eno33554984 和 eno50332208 使用teaming模式进行双网卡绑定

4. roundrobin模式:

roundrobin模式也称为轮询模式,它 基于每一个包 ,当某一台服务器的两张网卡设置为roundrobin模式teaming,此时服务器发出的数据包,就会在两个物理网卡上进行轮询,即第一个数据包走一张网卡,第二个数据包走第二张网卡,依次轮询。

注意:

        (1)roundrobin具有容错性,当一张网卡down掉,数据包依然发送成功。

        (2)在使用roundrobin模式必须要在交换机上做以太通道,不然会出现网络无法连通。

实际操作:

?
1 2 3   # 使用nmcli命令操作,创建team接口team0,同时设置teaming模式为roundrobin [root@localhost ~]# nmcli con add type team con-name team0 ifname team0 config '{"runner":{"name": "roundrobin"}}' Connection 'team0' (9dc48bd6-54b9-48db-b7dd-ecf34ae9196f) successfully added.
?
1 2 3 4   # 给接口team0设置ip地址 [root@localhost ~]# nmcli con modify team0 ipv4.address '10.0.0.2/24' ipv4.gateway '10.0.0.1'   # 设置为手动模式,取消DHCP [root@localhost ~]# nmcli con modify team0 ipv4.method manual
?
1 2 3 4 5 6 7 8 9 10 11 12 13   # 将两张物理网卡加入到team中 [root@localhost ~]# nmcli con add type team-slave con-name team0-port1 ifname eno33554984 master team0 Connection 'team0-port1' (22d3640e-f5c8-499c-b0dd-913c8970d800) successfully added. [root@localhost ~]# nmcli con add type team-slave con-name team0-port2 ifname eno50332208 master team0 Connection 'team0-port2' (12660d2a-0e1f-41e6-96b2-53de4fc6b78c) successfully added. [root@localhost ~]# nmcli con sh NAME     UUID                 TYPE      DEVICE   team0-port2 12660d2a-0e1f-41e6-96b2-53de4fc6b78c 802-3-ethernet --     eno16777736 51d00668-2cf5-41da-ad8d-5019d62e98ad 802-3-ethernet eno16777736 team0-port1 22d3640e-f5c8-499c-b0dd-913c8970d800 802-3-ethernet --     team0    9dc48bd6-54b9-48db-b7dd-ecf34ae9196f team      team0    eno33554984 32d2389e-4e82-4419-9d18-5aff8f0be003 802-3-ethernet eno33554984 eno50332208 eea2a115-63f8-4f33-be84-12559f02542c 802-3-ethernet eno50332208
?
1 2 3 4 5   # 查看team0的状态   [root@localhost ~]# teamdctl team0 st setup:  runner: roundrobin

4.1 roundrobin问题排查

第一次查看出现的是这样的结果,检查下配置:

?
1 2 3 4 5 6 7 8   # 通过直接查看网卡发现team0并没有启动 [root@localhost ~]# ip a | grep team0 5: team0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN     # 使用ifup 启动team0并没有成功,继续排查 [root@localhost ~]# ifup team0 [root@localhost ~]# ip a | grep team0 5: team0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN

直接sysetmctl restart network 也没有成功。

?
1 2 3 4 5 6 7 8 9   # 发现team0-port1 team0-port2没有添加成功物理网卡,怎么回事呢? [root@localhost ~]# nmcli con sh NAME     UUID                 TYPE      DEVICE   team0-port2 ec96c1e1-d268-4ba1-a2f9-0133a9f02655 802-3-ethernet --     eno16777736 51d00668-2cf5-41da-ad8d-5019d62e98ad 802-3-ethernet eno16777736 team0-port1 22d3640e-f5c8-499c-b0dd-913c8970d800 802-3-ethernet --     team0    9dc48bd6-54b9-48db-b7dd-ecf34ae9196f team      team0    eno33554984 32d2389e-4e82-4419-9d18-5aff8f0be003 802-3-ethernet eno33554984 eno50332208 eea2a115-63f8-4f33-be84-12559f02542c 802-3-ethernet eno50332208
?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22   # 删除掉 [root@localhost ~]# nmcli con del team0-port1 Connection 'team0-port1' (22d3640e-f5c8-499c-b0dd-913c8970d800) successfully deleted. [root@localhost ~]# nmcli con del team0-port2 Connection 'team0-port2' (ec96c1e1-d268-4ba1-a2f9-0133a9f02655) successfully deleted.       # 删除两张物理网卡的连接 [root@localhost ~]# nmcli con sh NAME     UUID                 TYPE      DEVICE   eno16777736 51d00668-2cf5-41da-ad8d-5019d62e98ad 802-3-ethernet eno16777736 team0    9dc48bd6-54b9-48db-b7dd-ecf34ae9196f team      team0    eno33554984 32d2389e-4e82-4419-9d18-5aff8f0be003 802-3-ethernet eno33554984 eno50332208 eea2a115-63f8-4f33-be84-12559f02542c 802-3-ethernet eno50332208 [root@localhost ~]# nmcli con del eno33554984 eno50332208 Connection 'eno33554984' (32d2389e-4e82-4419-9d18-5aff8f0be003) successfully deleted. Connection 'eno50332208' (eea2a115-63f8-4f33-be84-12559f02542c) successfully deleted.   # 删除成功 [root@localhost ~]# nmcli con sh NAME     UUID                 TYPE      DEVICE   eno16777736 51d00668-2cf5-41da-ad8d-5019d62e98ad 802-3-ethernet eno16777736 team0    9dc48bd6-54b9-48db-b7dd-ecf34ae9196f team      team0
?
1 2 3 4 5 6 7 8 9 10 11   # 再次将两张物理网卡添加到team [root@localhost ~]# nmcli con add type team-slave con-name team0-port1 ifname eno33554984 master team0 Connection 'team0-port1' (0331ea43-95c0-4106-b388-8484d4c3940d) successfully added. [root@localhost ~]# nmcli con add type team-slave con-name team0-port2 ifname eno50332208 master team0 Connection 'team0-port2' (880f2146-fe93-42dd-8d28-7d0dd50b4011) successfully added. [root@localhost ~]# nmcli con sh NAME     UUID                 TYPE      DEVICE   team0-port1 0331ea43-95c0-4106-b388-8484d4c3940d 802-3-ethernet eno33554984 eno16777736 51d00668-2cf5-41da-ad8d-5019d62e98ad 802-3-ethernet eno16777736 team0    9dc48bd6-54b9-48db-b7dd-ecf34ae9196f team      team0    team0-port2 880f2146-fe93-42dd-8d28-7d0dd50b4011 802-3-ethernet eno50332208

现在成功将两张物理网卡绑定到了team组中

?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19   # 现在查看team0的状态就出现了,模式是:roundrobin [root@localhost ~]# teamdctl team0 st setup:  runner: roundrobin ports:  eno33554984   link watches:    link summary: up    instance[link_watch_0]:     name: ethtool     link: up     down count: 0  eno50332208   link watches:    link summary: up    instance[link_watch_0]:     name: ethtool     link: up     down count: 0

这样,team模式的roundrobin搭建成功。

总结:

在做链路聚合的时候,所要使用到的物理网卡不能独立存在连接,也就是在nmcli con sh查看时,不能独立存在,否则就无法绑定到team模式中。

4.2 测试

因为这里是虚拟机环境,只能通过down掉网卡进行查看。

?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 [root@localhost ~]# teamdctl team0 st setup:  runner: roundrobin ports:  eno33554984   link watches:    link summary: up    instance[link_watch_0]:     name: ethtool     link: up     down count: 0  eno50332208   link watches:    link summary: up    instance[link_watch_0]:     name: ethtool     link: up     down count: 0

两张网卡同时在线,现在down掉其中一张网卡,

?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 [root@localhost ~]# nmcli con del team0-port1 Connection 'team0-port1' (0331ea43-95c0-4106-b388-8484d4c3940d) successfully deleted. [root@localhost ~]# nmcli con sh NAME     UUID                 TYPE      DEVICE   eno16777736 51d00668-2cf5-41da-ad8d-5019d62e98ad 802-3-ethernet eno16777736 team0    9dc48bd6-54b9-48db-b7dd-ecf34ae9196f team      team0    team0-port2 880f2146-fe93-42dd-8d28-7d0dd50b4011 802-3-ethernet eno50332208   [root@localhost ~]# teamdctl team0 st setup:  runner: roundrobin ports:  eno50332208   link watches:    link summary: up    instance[link_watch_0]:     name: ethtool     link: up     down count: 0

这样就发现eno33554984网卡已经down掉了。

?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 [root@localhost ~]# nmcli con add type team-slave con-name team0-port1 ifname eno33554984 master team0 Connection 'team0-port1' (59acd6bf-affc-4994-a050-83c45816859a) successfully added. [root@localhost ~]# [root@localhost ~]# teamdctl team0 st setup:  runner: roundrobin ports:  eno33554984   link watches:    link summary: up    instance[link_watch_0]:     name: ethtool     link: up     down count: 0  eno50332208   link watches:    link summary: up    instance[link_watch_0]:     name: ethtool     link: up     down count: 0

 虚拟机环境就这样测试了吧,至于生产环境就直接拔网线,ping测试。

资料有说linux下roundrobin具有容错的效果,为了测试是否有容错的效果,虚拟机做了下更改来验证:

[转帖]Centos7/RHEL7双网卡绑定的方法

这一次网卡全部改成桥接模式,为了更好的测试是否具有容错性。

[转帖]Centos7/RHEL7双网卡绑定的方法

roundrobin已经配置完毕。接下来我们down掉一张网卡检查是否具有容错性。

[转帖]Centos7/RHEL7双网卡绑定的方法 

通过虚拟机测试,容错性是存在的。

 5. 双网卡绑定activebackup的实现

?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 [root@localhost ~]# nmcli con sh NAME     UUID                 TYPE      DEVICE   team0-port2 2a1aa534-e021-4452-bb0a-2002dabcbc08 802-3-ethernet eno50332208 team0-port1 9a10c9ef-ee9c-4151-9a47-59b4668e8934 802-3-ethernet --     eno16777736 51d00668-2cf5-41da-ad8d-5019d62e98ad 802-3-ethernet eno16777736 team0    c2278f3f-5c6b-4e1d-b925-514d3c3832b6 team      team0    [root@localhost ~]# nmcli con del team0 team0-port1 team0-port2 Connection 'team0' (c2278f3f-5c6b-4e1d-b925-514d3c3832b6) successfully deleted. Connection 'team0-port1' (9a10c9ef-ee9c-4151-9a47-59b4668e8934) successfully deleted. Connection 'team0-port2' (2a1aa534-e021-4452-bb0a-2002dabcbc08) successfully deleted. [root@localhost ~]# nmcli con sh NAME     UUID                 TYPE      DEVICE   eno16777736 51d00668-2cf5-41da-ad8d-5019d62e98ad 802-3-ethernet eno16777736      # 以上操作就删除了roundrobin模式,恢复到初始状态。
  ?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 # 添加逻辑网卡team0,并启用activebackup模式 [root@localhost ~]# nmcli con add type team con-name team0 ifname team0 config '{"runner":{"name":"activebackup"}}' Connection 'team0' (f0794e59-419d-4c2a-96b9-464610b6321a) successfully added.   # 绑定ip [root@localhost ~]# nmcli con modify team0 ipv4.address 192.168.118.122/24 ipv4.gateway 192.168.118.1 [root@localhost ~]# nmcli con modify team0 ipv4.method manual     # 添加物理网卡到activebackup模式 [root@localhost ~]# nmcli con add type team-slave con-name team0-port1 ifname eno33554984 master team0 Connection 'team0-port1' (52656904-6e85-4a04-98b4-2b19773fa290) successfully added. [root@localhost ~]# nmcli con add type team-slave con-name team0-port2 ifname eno50332208 master team0 Connection 'team0-port2' (44d96e3a-014a-481f-9122-4ca2d3be9f7a) successfully added.
?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [root@localhost ~]# teamdctl team0 st setup:  runner: activebackup ports:  eno33554984   link watches:    link summary: up    instance[link_watch_0]:     name: ethtool     link: up     down count: 0  eno50332208   link watches:    link summary: up    instance[link_watch_0]:     name: ethtool     link: up     down count: 0 runner:  active port: eno33554984

成功,处于活动中的网卡为 eno33554984

5.1 测试

通过down掉活动网卡测试网络是否仍然处于连通状态

 [转帖]Centos7/RHEL7双网卡绑定的方法

测试成功。

注意: 在做网卡绑定的时候,如果发现物理网卡总是无法绑定到team0,请检查该物理网卡是否处于up状态。

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

上一篇:FastStone Capture——屏幕录像


下一篇:【论文阅读】Infomation Extraction from English & Japanese Resume with Neural Sequence Labelling Methods[AN