centos7 双网卡做bond

alenas

实验环境
[iyunv@localhost ~]# cat /etc/redhat-releaseCentOSLinux release 7.2.1511(Core)[iyunv@localhost ~]# uname -r3.10.0-327.el7.x86_64
查看网卡信息
[iyunv@localhost ~]# ip addr
1: lo:<LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
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: eno16777736:<BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:07:2c:86 brd ff:ff:ff:ff:ff:ff
inet 192.168.92.11/24 brd 192.168.92.255 scope global eno16777736
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe07:2c86/64 scope link
valid_lft forever preferred_lft forever
3: eno33554960:<BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:07:2c:90 brd ff:ff:ff:ff:ff:ff
4: eno50332184:<BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:07:2c:9a brd ff:ff:ff:ff:ff:ff
1 备份网卡配置文件
[iyunv@localhost ~]# cd /etc/sysconfig/network-scripts/
[iyunv@localhost network-scripts]# mkdir /tmp/net_bak
[iyunv@localhost network-scripts]# cp ifcfg-*/tmp/net_bak/
[iyunv@localhost network-scripts]# ls /tmp/net_bak/
ifcfg-eno16777736 ifcfg-eno33554960 ifcfg-eno50332184 ifcfg-eno67109408 ifcfg-eno83886632 ifcfg-lo
2 使用nmcli命令配置bond
# 生成bond配置文件
[iyunv@localhost network-scripts]# nmcli connection add type bond ifname bond0 mode 1
# 将网卡`eno33554960`与`eno50332184`绑定到bond0
[iyunv@localhost network-scripts]# nmcli connection add type bond-slave ifname eno33554960 master bond0
[iyunv@localhost network-scripts]# nmcli connection add type bond-slave ifname eno50332184 master bond0
# 查看生成的配置文件
[iyunv@localhost network-scripts]# ls ifcfg-bond-*
ifcfg-bond-bond0 ifcfg-bond-slave-eno33554960 ifcfg-bond-slave-eno50332184
bond的mode如下：

• balance-rr (0) –轮询模式，负载均衡（bond默认的模式）
• active-backup (1) –主备模式（常用）
• balance-xor (2)
• broadcast (3）
• 802.3ad (4) –聚合模式
• balance-tlb (5)
• balance-alb (6)
  

3 修改bond0网卡配置
[iyunv@localhost network-scripts]# vim ifcfg-bond-bond0
DEVICE=bond0
BONDING_OPTS=mode=active-backup
TYPE=Bond
BONDING_MASTER=yes
BOOTPROTO=static====>将 dhcp 改为static
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
NAME=bond-bond0
UUID=af2d6662-608c-4f5d-8018-1984cc3d87ef
ONBOOT=yes
IPADDR=192.168.92.20# 配置 IP 地址
PREFIX=24# 配置掩码 也可以使用 NETMASK=255.255.255.0
GATEWAY=192.168.92.2# 配置网关
如果不想修改bond网络接口配置文件可以在第2步的第一条命令后加上 ip4 "ip地址" gw4 "网关地址"
nmcli connection add type bond ifname bond0 mode 1 ip4 192.168.92.20/24 gw4 192.168.92.2
4 重启网络，验证配置结果
1. 查看网卡信息
[iyunv@localhost network-scripts]# ip addr show1: lo:<LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWNlink/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope hostvalid_lft forever preferred_lft forever2: eno16777736:<BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000link/ether 00:0c:29:07:2c:86 brd ff:ff:ff:ff:ff:ffinet 192.168.92.11/24 brd 192.168.92.255 scope global eno16777736valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:fe07:2c86/64 scope linkvalid_lft forever preferred_lft forever3: eno33554960:<BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000link/ether 00:0c:29:07:2c:90 brd ff:ff:ff:ff:ff:ff4: eno50332184:<BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000link/ether 00:0c:29:07:2c:90 brd ff:ff:ff:ff:ff:ff31: bond0:<BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UPlink/ether 00:0c:29:07:2c:90 brd ff:ff:ff:ff:ff:ffinet 192.168.92.20/24 brd 192.168.92.255 scope global bond0valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:fe07:2c90/64 scope linkvalid_lft forever preferred_lft forever
2. 查看bond信息
[iyunv@localhost network-scripts]# cat /proc/net/bonding/bond0EthernetChannelBondingDriver: v3.7.1(April27,2011)BondingMode: fault-tolerance (active-backup)===> bond主备模式PrimarySlave:NoneCurrentlyActiveSlave: eno33554960 ===>当前激活的网卡eno33554960MII Status: upMII PollingInterval(ms):100UpDelay(ms):0DownDelay(ms):0SlaveInterface: eno33554960 ===> bond0 组内的网卡MII Status: upSpeed:1000MbpsDuplex: fullLinkFailureCount:0Permanent HW addr:00:0c:29:07:2c:90Slave queue ID:0SlaveInterface: eno50332184 ===> bond0 组内的网卡MII Status: upSpeed:1000MbpsDuplex: fullLinkFailureCount:0Permanent HW addr:00:0c:29:07:2c:9aSlave queue ID:0
5 删除 bond 设备
1.查看网络设备
[iyunv@localhost ~]# ls /sys/class/net/bond0 bond1 bonding_masters eno16777736 eno33554960 eno50332184 eno67109408 eno83886632 lo
2.删除bond网络设备
直接删除bond0，会提示无权限。
可以通过bonding_masters文件删除bond设备,但是bonding_masters文件是无法直接修改的。
[iyunv@localhost ~]# echo -bond0 >/sys/class/net/bonding_masters
echo 后面的 ‘-’ 是删除设备，‘+’是增加设备

zhangxiajun

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