Linux网络管理之多网卡绑定

  一、bonding介绍

  在企业Linux服务器管理里中,服务器的可靠性、可用性以及I/O速度都非常重要,保持服务器的高可用和安全性是生产环境的重要指标,其中最重要的一点是服务器网络连接的高可用性。通常我们会把重要的服务器做主备,其目的在于当主服务器宕机,备份服务器马上接管其主服务器的工作,从而实现服务的连续,不至于服务的停用。还有一种情况,我们会给服务器做负载均衡,当一个服务器对外提供服务,接收到用户请求太多,会导致服务器宕机,这个时候我们用主备显得力不从心,怎么办呢,这个时候我们就需要考虑把原来访问一台服务器的流量,分别用很多台服务器来分担,这样一来把原来一台服务器承受的压力分别用很多台服务器来承担。我们知道一张物理网卡的网络吞吐量是有限的,当服务器上的网卡吞吐量达到上限,这个时候就算性能再好的服务器我们访问它都会感觉慢,这时我们就需要考虑增大网卡的网络吞吐量。一张网卡不够用,我们用两张,三张,很多张。虽然很多张网卡同时对外提供服务是可以解决吞吐量的问题,但是新的问题又产生了,用户怎么知道我们其他网卡上的ip呢?通常情况我们的都是以一个ip对外服务,(当然也有多个ip对外服务,一个域名对外服务,后台可能是多个IP),用户只知道一个ip或者域名,那我们虽然装了很多张网卡,但直接使用好像是达不到我们理想的效果。有没有一种技术将很多张网卡虚拟成一个大的网卡,就有点类似于LVM磁盘管理一样,可以把很多张网卡整合成一张,然后来提高网卡的性能呢?诶,有的,bonding就有这样的功能。它可以将多张网卡绑定同一IP地址对外提供服务,可实现高可用或负载均衡。我们都知道两张网卡或多张网卡设置同一IP地址是不可以的,但bonding可以,它的底层工作原理就是通过虚拟一块网卡对外提供连接,物理网卡的MAC地址都会被修改成相同的MAC地址。这样一来就实现了提高网卡的性能的同时也有冗余的网卡。

  二、bonding工作模式

  bonding的工作模式有七种,其中有三种是最为常用

  Mode 0 (balance-rr)轮转策略:这种模式就是从头到尾顺序的在每一个slave接口上发送数据包,它提供了网卡的负载均衡和容错的能力

  mode 1 (active-backup) 活动-备份策略:这种模式只有一个slave被激活,当且仅当活动的slave接口失败时才会激活其他slave,为了避免交换机发生混乱,此时绑定的MAC地址只有一个外部端口上可见

  mode 3(broadcast)广播策略:这种模式在所有的slave接口上传送所有的报文,提供容错能力。

  注意:active-backup、balance-tlb 和 balance-alb 模式不需要交换机的任何特殊配置。其他绑定模式需要配置交换机以便整合链接。如:Cisco 交换机需要在模式 0、2 和 3 中使用 EtherChannel,但在模式4中需要 LACP和EtherChannel

  三、bonding实现 mode 0 并测试

  1)查看系统是否加载了bonding模块

[root@test-centos7-node1 ~]# lsmod|grep bonding
[root@test-centos7-node1 ~]# 

  说明:如果你的系统执行了lsmod命令 没有过滤到bonding相关的内容,说明你的系统没有加载bonding模块

  2)加载bonding模块

[root@test-centos7-node1 ~]# lsmod|grep bonding
[root@test-centos7-node1 ~]# modprobe bonding
[root@test-centos7-node1 ~]# lsmod |grep bonding
bonding               145728  0 
[root@test-centos7-node1 ~]# 

  说明:通常情况下内核版本2.4以后都是默认支持bonding模块,无需手动编译

  3)备份原有的网卡配置文件

[root@test-centos7-node1 test]# ls /etc/sysconfig/network-scripts/
ifcfg-ens33  ifdown-ippp    ifdown-sit       ifup-bnep  ifup-plusb   ifup-TeamPort
ifcfg-ens36  ifdown-ipv6    ifdown-Team      ifup-eth   ifup-post    ifup-tunnel
ifcfg-lo     ifdown-isdn    ifdown-TeamPort  ifup-ippp  ifup-ppp     ifup-wireless
ifdown       ifdown-post    ifdown-tunnel    ifup-ipv6  ifup-routes  init.ipv6-global
ifdown-bnep  ifdown-ppp     ifup             ifup-isdn  ifup-sit     network-functions
ifdown-eth   ifdown-routes  ifup-aliases     ifup-plip  ifup-Team    network-functions-ipv6
[root@test-centos7-node1 test]# cp /etc/sysconfig/network-scripts/{ifcfg-ens33,ifcfg-ens33.bak}
[root@test-centos7-node1 test]# cp /etc/sysconfig/network-scripts/{ifcfg-ens36,ifcfg-ens36.bak}
[root@test-centos7-node1 test]# ls /etc/sysconfig/network-scripts/
ifcfg-ens33      ifdown       ifdown-isdn    ifdown-Team      ifup-bnep  ifup-plip    ifup-sit       init.ipv6-global
ifcfg-ens33.bak  ifdown-bnep  ifdown-post    ifdown-TeamPort  ifup-eth   ifup-plusb   ifup-Team      network-functions
ifcfg-ens36      ifdown-eth   ifdown-ppp     ifdown-tunnel    ifup-ippp  ifup-post    ifup-TeamPort  network-functions-ipv6
ifcfg-ens36.bak  ifdown-ippp  ifdown-routes  ifup             ifup-ipv6  ifup-ppp     ifup-tunnel
ifcfg-lo         ifdown-ipv6  ifdown-sit     ifup-aliases     ifup-isdn  ifup-routes  ifup-wireless
[root@test-centos7-node1 test]# 

  4)创建bonding配置文件

[root@test-centos7-node1 test]# vim /etc/sysconfig/network-scripts/ifcfg-bond0
  
DEVICE=bond0
ONBOOT=YES
BOOTPROTO=static
IPADDR=192.168.0.33
PREFIX=24
GATEWAY=192.168.0.1
DNS1=192.168.0.1
BONDING_OPTS="miimon=100 mode=0"
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"/etc/sysconfig/network-scripts/ifcfg-bond0" [New] 8L, 141C written                                       
[root@test-centos7-node1 test]# 

  说明:band0相对于原来的物理网卡它也是一块网卡,我们可以像配置物理网卡一样配置,但它又区别于物理网卡,它是一张虚拟的网卡,我们除了配置ip地址信息之外,还需要配置它工作的模式,以及心跳检测时间,其中miimon 是用来进行链路监测的。如果miimon=100,那么系统每100ms 监测一次链路连接状态,如果有一条线路不通就转入另一条线路。

  5)修改物理网卡配置文件

[root@test-centos7-node1 test]# cat /etc/sysconfig/network-scripts/ifcfg-ens33
NAME=ens33
DEVICE=ens33
ONBOOT=yes
BOOTPROTO=none
MASTER=bond0
SLAVE=yes
[root@test-centos7-node1 test]# cat /etc/sysconfig/network-scripts/ifcfg-ens36
NAME=ens36
DEVICE=ens36
ONBOOT=yes
BOOTPROTO=none
MASTER=bond0
SLAVE=yes
[root@test-centos7-node1 test]# 

  说明:把原有的配置ip信息去掉,把BOOTPROTO修改成none,然后新加MASTER=bond0,SLAVE=yes即可

  6)重启网络服务并测试

   说明:重启网络服务我用的crt会一直卡在哪里,原因是我们重新配置了IP地址。我们可用crt重新连接新配的地址

[root@test-centos7-node1 test]# ip a s
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000
    link/ether 00:0c:29:f2:82:0c brd ff:ff:ff:ff:ff:ff
3: ens36: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000
    link/ether 00:0c:29:f2:82:0c brd ff:ff:ff:ff:ff:ff
5: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP qlen 1000
    link/ether 00:0c:29:f2:82:0c brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.33/24 brd 192.168.0.255 scope global bond0
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fef2:820c/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
[root@test-centos7-node1 test]# cat /proc/net/bonding/bond0 
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: load balancing (round-robin)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: ens33
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:f2:82:0c
Slave queue ID: 0

Slave Interface: ens36
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:f2:82:16
Slave queue ID: 0
[root@test-centos7-node1 test]# 

  说明:可看到两张物理网卡和bond0的MAC都变成一样了,况且两张物理网卡上没有任何ip地址,bond0上是我们刚才配置的ip地址,说明我们配置的bond0已经可以使用了。当然我们也可以看/proc/net/bonding/bond0来查看bond的详细信息,其中可以看到两块物理网卡都从属bond0,band0的工作模式是load balancing。此模式实现了网卡的负载均衡和容错,我们可任意断开一个物理网卡,其网络服务不断开。测试的话可选择下载一个大文件来测试。

  下载http://192.168.0.99/bigfile 文件测试

  1)使用bond0 两物理网卡负载均衡来下载

[root@test-centos7-node1 test]# time wget http://192.168.0.99/bigfile
--2020-01-10 10:33:48--  http://192.168.0.99/bigfile
Connecting to 192.168.0.99:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 5211422720 (4.9G)
Saving to: ‘bigfile’

100%[============================================================>] 5,211,422,720 57.2MB/s   in 93s    

2020-01-10 10:35:21 (53.6 MB/s) - ‘bigfile’ saved [5211422720/5211422720]


real    1m32.961s
user    0m0.502s
sys     0m21.582s
[root@test-centos7-node1 test]# 

  说:可看到下载一个4.9G的大文件,用bond0下载平均下载速度是53.6MB/S

  2)不使用bond0下载,恢复两物理网卡,让其都是用不同的IP

[root@test-centos7-node1 ~]# ls /etc/sysconfig/network-scripts/
ifcfg-ens33      ifdown-ippp    ifdown-TeamPort  ifup-isdn    ifup-TeamPort
ifcfg-ens33.bak  ifdown-ipv6    ifdown-tunnel    ifup-plip    ifup-tunnel
ifcfg-ens36      ifdown-isdn    ifup             ifup-plusb   ifup-wireless
ifcfg-ens36.bak  ifdown-post    ifup-aliases     ifup-post    init.ipv6-global
ifcfg-lo         ifdown-ppp     ifup-bnep        ifup-ppp     network-functions
ifdown           ifdown-routes  ifup-eth         ifup-routes  network-functions-ipv6
ifdown-bnep      ifdown-sit     ifup-ippp        ifup-sit
ifdown-eth       ifdown-Team    ifup-ipv6        ifup-Team
[root@test-centos7-node1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens33
NAME=ens33
DEVICE=ens33
ONBOOT=yes
IPADDR=192.168.0.10
PREFIX=24
GATEWAY=192.168.0.1
DNS1=192.168.0.1
[root@test-centos7-node1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens36
NAME=ens36
DEVICE=ens36
ONBOOT=yes
IPADDR=192.168.0.20
PREFIX=24
GATEWAY=192.168.0.1
DNS1=192.168.0.1
[root@test-centos7-node1 ~]# ip a 
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:f2:82:0c brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.10/24 brd 192.168.0.255 scope global ens33
       valid_lft forever preferred_lft forever
3: ens36: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:f2:82:16 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.20/24 brd 192.168.0.255 scope global ens36
       valid_lft forever preferred_lft forever
5: bond0: <NO-CARRIER,BROADCAST,MULTICAST,MASTER,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
    link/ether e6:e0:29:24:b5:e1 brd ff:ff:ff:ff:ff:ff
[root@test-centos7-node1 ~]# time wget http://192.168.0.99/bigfile
--2020-01-10 10:42:55--  http://192.168.0.99/bigfile
Connecting to 192.168.0.99:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 5211422720 (4.9G)
Saving to: ‘bigfile’

100%[=================================================>] 5,211,422,720 63.6MB/s   in 2m 48s 

2020-01-10 10:45:43 (29.6 MB/s) - ‘bigfile’ saved [5211422720/5211422720]


real    2m48.065s
user    0m0.823s
sys     1m6.360s
[root@test-centos7-node1 ~]#

  说明:可看到不使用bond0 下载平均速度是29.6MB/S

  四、bonding实现 mode 1 并测试

  前面的网卡配置文件备份,这里就不在演示,同上面的一样,这里只需要修改bond0 的配置文件,将其mode=0 修改成mode=1 ,物理网卡的配置文件同上面的一样

[root@test-centos7-node1 ~]# ip a l
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000
    link/ether e6:e0:29:24:b5:e1 brd ff:ff:ff:ff:ff:ff
3: ens36: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000
    link/ether e6:e0:29:24:b5:e1 brd ff:ff:ff:ff:ff:ff
5: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP qlen 1000
    link/ether e6:e0:29:24:b5:e1 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.33/24 brd 192.168.0.255 scope global bond0
       valid_lft forever preferred_lft forever
    inet6 fe80::e4e0:29ff:fe24:b5e1/64 scope link 
       valid_lft forever preferred_lft forever
[root@test-centos7-node1 ~]# cat /proc/net/bonding/bond0 
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: ens33
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: ens33
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:f2:82:0c
Slave queue ID: 0

Slave Interface: ens36
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:f2:82:16
Slave queue ID: 0
[root@test-centos7-node1 ~]# 

  说明:可以看到,两个网卡都是启动的状态,当前活跃的网卡是ens33

  测试:模拟ens33网线断了,看看ens36会不会顶替上去

 

   说明:可以看到ens33出现故障 ens36 立即就顶替上去了,这里需要注意一点ens33如果恢复了,它不会去顶替ens36 它会一直盯着ens36 直到它ens36死了,它才会顶替上去。

  五、bonding实现 mode 3

  前期准备同上,只需更改bond0配置文件/etc/sysconfig/network-scripts/ifcfg-bond0,把mode=1  修改成mode=3,然后重启服务网络即可

[root@test-centos7-node1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
ONBOOT=YES
BOOTPROTO=static
IPADDR=192.168.0.33
PREFIX=24
GATEWAY=192.168.0.1
DNS1=192.168.0.1
BONDING_OPTS="miimon=100 mode=3"
[root@test-centos7-node1 ~]# systemctl restart network
[root@test-centos7-node1 ~]# ip a 
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000
    link/ether e6:e0:29:24:b5:e1 brd ff:ff:ff:ff:ff:ff
3: ens36: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000
    link/ether e6:e0:29:24:b5:e1 brd ff:ff:ff:ff:ff:ff
5: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP qlen 1000
    link/ether e6:e0:29:24:b5:e1 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.33/24 brd 192.168.0.255 scope global bond0
       valid_lft forever preferred_lft forever
    inet6 fe80::e4e0:29ff:fe24:b5e1/64 scope link tentative dadfailed 
       valid_lft forever preferred_lft forever
[root@test-centos7-node1 ~]# cat /proc/net/bonding/bond0 
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: fault-tolerance (broadcast)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: ens33
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:f2:82:0c
Slave queue ID: 0

Slave Interface: ens36
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:f2:82:16
Slave queue ID: 0
[root@test-centos7-node1 ~]#

  说明:此模式是广播模式,什么意思呢,就是访问bond0 它就会广播给每个网卡,然后每张物理网卡收到广播后都会回应。

  测试:在192.168.0.99 上ping 192.168.0.33

[root@test html]# ping 192.168.0.33
PING 192.168.0.33 (192.168.0.33) 56(84) bytes of data.
64 bytes from 192.168.0.33: icmp_seq=1 ttl=64 time=1.43 ms
64 bytes from 192.168.0.33: icmp_seq=1 ttl=64 time=1.51 ms (DUP!)
64 bytes from 192.168.0.33: icmp_seq=2 ttl=64 time=1.38 ms
64 bytes from 192.168.0.33: icmp_seq=2 ttl=64 time=1.45 ms (DUP!)
64 bytes from 192.168.0.33: icmp_seq=3 ttl=64 time=2.22 ms
64 bytes from 192.168.0.33: icmp_seq=3 ttl=64 time=2.28 ms (DUP!)
64 bytes from 192.168.0.33: icmp_seq=4 ttl=64 time=0.997 ms
64 bytes from 192.168.0.33: icmp_seq=4 ttl=64 time=1.06 ms (DUP!)
64 bytes from 192.168.0.33: icmp_seq=5 ttl=64 time=0.618 ms
64 bytes from 192.168.0.33: icmp_seq=5 ttl=64 time=0.764 ms (DUP!)
64 bytes from 192.168.0.33: icmp_seq=6 ttl=64 time=0.600 ms
64 bytes from 192.168.0.33: icmp_seq=6 ttl=64 time=0.670 ms (DUP!)
64 bytes from 192.168.0.33: icmp_seq=7 ttl=64 time=0.584 ms
64 bytes from 192.168.0.33: icmp_seq=7 ttl=64 time=0.707 ms (DUP!)
64 bytes from 192.168.0.33: icmp_seq=8 ttl=64 time=0.581 ms
64 bytes from 192.168.0.33: icmp_seq=8 ttl=64 time=0.651 ms (DUP!)
64 bytes from 192.168.0.33: icmp_seq=9 ttl=64 time=0.579 ms
64 bytes from 192.168.0.33: icmp_seq=9 ttl=64 time=0.650 ms (DUP!)
64 bytes from 192.168.0.33: icmp_seq=10 ttl=64 time=0.589 ms
64 bytes from 192.168.0.33: icmp_seq=10 ttl=64 time=0.661 ms (DUP!)
^C
--- 192.168.0.33 ping statistics ---
10 packets transmitted, 10 received, +10 duplicates, 0% packet loss, time 9006ms
rtt min/avg/max/mdev = 0.579/0.999/2.284/0.528 ms
[root@test html]#

  说明:0.99向0.33发送一条ping报文,0.99上收到了两个消息,是不是很奇怪呀,出去一个回来两个重复的。这就是因为0.33上的两块物理网卡收到广播后都进行了回应,所以在0.99上会收到2条重复的回应消息。

  六、卸载bonding 恢复原有物理网卡

  1)恢复配置文件

[root@test-centos7-node1 ~]# cp /etc/sysconfig/network-scripts/{ifcfg-ens33.bak,ifcfg-ens33}
cp: overwrite ‘/etc/sysconfig/network-scripts/ifcfg-ens33’? y
[root@test-centos7-node1 ~]# cp /etc/sysconfig/network-scripts/{ifcfg-ens36.bak,ifcfg-ens36}
cp: overwrite ‘/etc/sysconfig/network-scripts/ifcfg-ens36’? y
[root@test-centos7-node1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens33
NAME=ens33
DEVICE=ens33
ONBOOT=yes
IPADDR=192.168.0.10
PREFIX=24
GATEWAY=192.168.0.1
DNS1=192.168.0.1
[root@test-centos7-node1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens36
NAME=ens36
DEVICE=ens36
ONBOOT=yes
IPADDR=192.168.0.20
PREFIX=24
GATEWAY=192.168.0.1
DNS1=192.168.0.1
[root@test-centos7-node1 ~]# mv /etc/sysconfig/network-scripts/{ifcfg-bond0,ifcfg-bond0.bak} 
[root@test-centos7-node1 ~]# ls /etc/sysconfig/network-scripts/
ifcfg-bond0.bak  ifcfg-lo     ifdown-ipv6    ifdown-sit       ifup-aliases  ifup-isdn   ifup-routes    ifup-wireless
ifcfg-ens33      ifdown       ifdown-isdn    ifdown-Team      ifup-bnep     ifup-plip   ifup-sit       init.ipv6-global
ifcfg-ens33.bak  ifdown-bnep  ifdown-post    ifdown-TeamPort  ifup-eth      ifup-plusb  ifup-Team      network-functions
ifcfg-ens36      ifdown-eth   ifdown-ppp     ifdown-tunnel    ifup-ippp     ifup-post   ifup-TeamPort  network-functions-ipv6
ifcfg-ens36.bak  ifdown-ippp  ifdown-routes  ifup             ifup-ipv6     ifup-ppp    ifup-tunnel
[root@test-centos7-node1 ~]# 

  2)卸载bonding 模块

   3)重启

  正常情况下修改了配置文件后重启网络服务就可以了 ,如果要卸载bonding模块,卸载后重启网络服务,物理网卡是启动不起来的,需要把服务器重启下即可恢复正常。

  总结:通过上面的实验可以看到 bonding技术类似raid技术,它可把多张网卡绑定在一起,不同的模式有着不同模式的特点。mode 0 轮循负载均衡,可提高网卡的性能的同时也有冗余网卡。mode1 主备模式,可实现网卡的高可用。mode3 广播模式,提供容错能力。其他模式可参考文档https://www.kernel.org/doc/Documentation/networking/bonding.txt

posted @ 2020-01-11 01:33  Linux-1874  阅读(2732)  评论(1编辑  收藏  举报