centos7網卡bond配置

centos7網卡bond配置

1 備份網卡配置文件
2 使用nmcli命令配置bond
3 修改bond0網卡配置
4 重啟網絡，驗證配置結果
5 刪除 bond 設備
6 ifensalve 工具

實驗環境

[root@localhost ~]# cat /etc/redhat-release
CentOSLinux release 7.2.1511(Core)
[root@localhost ~]# uname -r
3.10.0-327.el7.x86_64

linux服務器 eno33554960 與 eno50332184 兩張網卡配置 bond 步驟（如果要配置多個bond0,1…按照這個流程重復操作即可）參考

查看網卡信息

 
                 [root@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 備份網卡配置文件

 
                 [root@localhost ~] 
                 # cd /etc/sysconfig/network-scripts/ 
                
                 [root@localhost network-scripts] 
                 # mkdir /tmp/net_bak 
                
                 [root@localhost network-scripts] 
                 # cp ifcfg-*/tmp/net_bak/ 
                
                 [root@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 
                
                 [root@localhost network-scripts] 
                 # nmcli connection add type bond ifname bond0 mode 0 
                
                 # 將網卡`eno33554960`與`eno50332184`綁定到bond0 
                
                 [root@localhost network-scripts] 
                 # nmcli connection add type bond-slave ifname eno33554960 master bond0 
                
                 [root@localhost network-scripts] 
                 # nmcli connection add type bond-slave ifname eno50332184 master bond0 
                
                 # 查看生成的配置文件 
                
                 [root@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) –輪詢模式，負載均衡（bond默認的模式）
active-backup (1) –主備模式（常用）
balance-xor (2)
broadcast (3）
802.3ad (4) –聚合模式
balance-tlb (5)
balance-alb (6)

3 修改bond0網卡配置

 
                [root@localhost network-scripts] 
                # vim ifcfg-bond-bond0 
               
                DEVICE=bond0 
               
                BONDING_OPTS=mode=active-backup 
               
                TYPE=Bond 
               
                BONDING_MASTER= 
                yes 
               
                BOOTPROTO=static====>將 dhcp 改為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 
                # 配置掩碼 也可以使用 NETMASK=255.255.255.0 
               
                GATEWAY=192.168.92.2 
                # 配置網關

Tips: 如果不想修改bond網絡接口配置文件可以在第2步的第一條命令后加上 ip4 "ip地址" gw4 "網關地址"
nmcli connection add type bond ifname bond0 mode 1 ip4 192.168.92.20/24 gw4 192.168.92.2

4 重啟網絡，驗證配置結果

1. 查看網卡信息

[root@localhost network-scripts]# ip addr show
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,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000
link/ether 00:0c:29:07:2c:90 brd ff:ff:ff:ff:ff:ff
4: eno50332184:<BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000
link/ether 00:0c:29:07:2c:90 brd ff:ff:ff:ff:ff:ff
31: bond0:<BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
link/ether 00:0c:29:07:2c:90 brd ff:ff:ff:ff:ff:ff
inet 192.168.92.20/24 brd 192.168.92.255 scope global bond0
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe07:2c90/64 scope link
valid_lft forever preferred_lft forever

2. 查看bond信息

[root@localhost network-scripts]# cat /proc/net/bonding/bond0
EthernetChannelBondingDriver: v3.7.1(April27,2011)
BondingMode: fault-tolerance (active-backup)===> bond主備模式
PrimarySlave:None
CurrentlyActiveSlave: eno33554960 ===>當前激活的網卡eno33554960
MII Status: up
MII PollingInterval(ms):100
UpDelay(ms):0
DownDelay(ms):0
SlaveInterface: eno33554960 ===> bond0 組內的網卡
MII Status: up
Speed:1000Mbps
Duplex: full
LinkFailureCount:0
Permanent HW addr:00:0c:29:07:2c:90
Slave queue ID:0
SlaveInterface: eno50332184 ===> bond0 組內的網卡
MII Status: up
Speed:1000Mbps
Duplex: full
LinkFailureCount:0
Permanent HW addr:00:0c:29:07:2c:9a
Slave queue ID:0

5 刪除 bond 設備

當我們需要刪除bond設備的時候,該如何刪除呢？請看下面操作

1.查看網絡設備

[root@localhost ~]# ls /sys/class/net/
bond0 bond1 bonding_masters eno16777736 eno33554960 eno50332184 eno67109408 eno83886632 lo

2.刪除bond網絡設備

直接刪除bond0，會提示無權限。
可以通過bonding_masters文件刪除bond設備,但是bonding_masters文件是無法直接修改的。

[root@localhost ~]# echo -bond0 >/sys/class/net/bonding_masters

echo 后面的 ‘-’ 是刪除設備，‘+’是增加設備

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