CentOS6/CentOS7 双网卡配置bonding

在CentOS6/RHEL6上配置网络绑定

网络绑定是将多个局域网卡（eth0和eth1）聚合成称为绑定接口的单个接口。网络绑定是一项内核功能，也称为网卡绑定。通常需要绑定来提供高可用性和负载均衡服务。

在本教程中，笔者在CentOS 6.X上配置网络绑定，笔者服务器有两个Lan卡（em1和em2）并将创建绑定接口（bond0)

步骤一、创建绑定文件（ifcfg-bond0）并指定IP地址，网络掩码和网关

cat /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
IPADDR=192.168.0.210
NETMASK=255.255.255.0
GATEWAY=192.168.0.1
TYPE=Bond
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=static

IP地址相关需自定义
步骤二、编辑em1和em2的文件，并确保输入主和从条目，如下所示

[root@aniu-cache-01 ~]# cat /etc/sysconfig/network-scripts/ifcfg-em1
DEVICE=em1
HWADDR=B87209:6E
TYPE=Ethernet
UUID=f0fa2ed7-27a6-4c70-89da-45965a249dfa
ONBOOT=yes
NM_CONTROLLED=no
MASTER=bond0
SLAVE=yes
[root@aniu-cache-01 ~]# cat /etc/sysconfig/network-scripts/ifcfg-em2
DEVICE=em2
HWADDR=B87209:6F
TYPE=Ethernet
UUID=c18e1b9e-4a86-47d1-84e2-c4e2a60863ba
ONBOOT=no
NM_CONTROLLED=no
MASTER=bond0
SLAVE=yes
步骤三、创建Bond文件（bonding.conf）

vi /etc/modprobe.d/bonding.conf
alias bond0 bonding
options bond0 mode=1 miimon=100

高可用模式

bonding.conf文件中使用的不同模式,功能不同，具体如下

balance-rr or 0 — 用于容错和负载平衡的循环模式
active-backup or 1 — 设置用于容错的活动备份模式
balance-xor or 2 — 为容错和负载平衡设置异或（异或）模式。
broadcast or 3 — 设置容错的广播模式。所有传输都在所有的从接口上发送。
802.3ad or 4 — 设置IEEE 802.3ad动态链接聚合模式。创建共享相同速度和双工设置的聚合组。
balance-tlb or 5 — 设置传输负载平衡（TLB）模式以实现容错和负载平衡。
balance-alb or 6 — 为容错和负载平衡设置活动负载平衡（ALB）模式。

步骤四、重启网络服务，并检查网络接口信息

[root@aniu-cache-01 ~]# ifconfig bond0
bond0 Link encap:Ethernet HWaddr B87209:6E

      inet addr:192.168.0.210  Bcast:192.168.0.255  Mask:255.255.255.0
      inet6 addr: fe80:72ff96e/64 Scope:Link
      UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
      RX packets:271980 errors:0 dropped:0 overruns:0 frame:0
      TX packets:16989 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0 
      RX bytes:45139572 (43.0 MiB)  TX bytes:1719627 (1.6 MiB)

步骤五、验证bonding状态

[root@aniu-cache-01 ~]# 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: em1
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: em1
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: b87209:6e
Slave queue ID: 0

Slave Interface: em2
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: b87209:6f
Slave queue ID: 0

注意：根据上面显示的输出，正在使用主动备份绑定。要执行测试，只需禁用一个接口，并检查是否仍在使用bond ip访问您的机器。

在CentOS 7 / RHEL 7中配置NIC（网络接口卡）绑定

先决条件

如果bonding模块没有加载到你的Linux机器上，那么使用下面的命令来加载。
modprobe bonding

要列出绑定模块信息，请使用以下命令
[root@aniu-k8s ~]# modinfo bonding # 类似下面信息
filename: /lib/modules/3.10.0-693.17.1.el7.x86_64/kernel/drivers/net/bonding/bonding.ko.xz
author: Thomas Davis, tadavis@lbl.gov and many others
description: Ethernet Channel Bonding Driver, v3.7.1
version: 3.7.1
license: GPL
alias: rtnl-link-bond
rhelversion: 7.4
srcversion: 33C47E3D00DF16A17A5AB9C
depends:
intree: Y
vermagic: 3.10.0-693.17.1.el7.x86_64 SMP mod_unload modversions
signer: CentOS Linux kernel signing key
sig_key: 5068:68:802C54F083C69D4F:22
sig_hashalgo: sha256
parm: max_bonds:Max number of bonded devices (int)
parm: tx_queues:Max number of transmit queues (default = 16) (int)
parm: num_grat_arp:Number of peer notifications to send on failover event (alias of num_unsol_na) (int)
parm: num_unsol_na:Number of peer notifications to send on failover event (alias of num_grat_arp) (int)
parm: miimon:Link check interval in milliseconds (int)
parm: updelay:Delay before considering link up, in milliseconds (int)
parm: downdelay:Delay before considering link down, in milliseconds (int)
parm: use_carrier:Use netif_carrier_ok (vs MII ioctls) in miimon; 0 for off, 1 for on (default) (int)
parm: mode:Mode of operation; 0 for balance-rr, 1 for active-backup, 2 for balance-xor, 3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, 6 for balance-alb (charp)
parm: primary:Primary network device to use (charp)
parm: primary_reselect:Reselect primary slave once it comes up; 0 for always (default), 1 for only if speed of primary is better, 2 for only on active slave failure (charp)
parm: lacp_rate:LACPDU tx rate to request from 802.3ad partner; 0 for slow, 1 for fast (charp)
parm: ad_select:802.3ad aggregation selection logic; 0 for stable (default), 1 for bandwidth, 2 for count (charp)
parm: min_links:Minimum number of available links before turning on carrier (int)
parm: xmit_hash_policy:balance-xor and 802.3ad hashing method; 0 for layer 2 (default), 1 for layer 3+4, 2 for layer 2+3, 3 for encap layer 2+3, 4 for encap layer 3+4 (charp)
parm: arp_interval:arp interval in milliseconds (int)
parm: arp_ip_target:arp targets in n.n.n.n form (array of charp)
parm: arp_validate:validate src/dst of ARP probes; 0 for none (default), 1 for active, 2 for backup, 3 for all (charp)
parm: arp_all_targets:fail on any/all arp targets timeout; 0 for any (default), 1 for all (charp)
parm: fail_over_mac:For active-backup, do not set all slaves to the same MAC; 0 for none (default), 1 for active, 2 for follow (charp)
parm: all_slaves_active:Keep all frames received on an interface by setting active flag for all slaves; 0 for never (default), 1 for always. (int)
parm: resend_igmp:Number of IGMP membership reports to send on link failure (int)
parm: packets_per_slave:Packets to send per slave in balance-rr mode; 0 for a random slave, 1 packet per slave (default), >1 packets per slave. (int)
parm: lp_interval:The number of seconds between instances where the bonding driver sends learning packets to each slaves peer switch. The default is 1. (uint)
步骤：1创建bond接口文件

$ cat /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
TYPE=Bond
NAME=bond0
BONDING_MASTER=yes
BOOTPROTO=none
ONBOOT=yes
IPADDR=192.168.1.70
NETMASK=255.255.255.0
GATEWAY=192.168.1.1
BONDING_OPTS=”mode=5 miimon=100”
步骤：2编辑NIC接口文件

ifcfg-enp0s3
[root@openstack ~]# vi /etc/sysconfig/network-scripts/ifcfg-enp0s3
TYPE=Ethernet
BOOTPROTO=none
DEVICE=enp0s3
ONBOOT=yes
HWADDR=”08:00:2760:c9”
MASTER=bond0
SLAVE=yes

ifcfg-enp0s8
[root@openstack ~]# cat /etc/sysconfig/network-scripts/ifcfg-enp0s8
TYPE=Ethernet
BOOTPROTO=none
DEVICE=enp0s8
ONBOOT=yes
HWADDR=”08:00:2771:8d”
MASTER=bond0
SLAVE=yes
步骤：3重新启动网络服务

root@openstack ~]# systemctl restart network.service
步骤：4测试和验证绑定界面。

ifcofnig
cat /proc/net/bonding/bond0
步骤：5容错测试

$ ifdown enp0s8

查看网络bond0状态
参考链接：https://www.thegeekdiary.com/centos-rhel-7-how-to-create-an-interface-bonding-nic-teaming-using-nmcli/