Linux 系统双网卡绑定配置实现

系统版本

[root@ ~]# cat /etc/redhat-release 

CentOS release 6.8 (Final)

[root@ ~]# uname -r

2.6.32-642.6.1.el6.x86_64

网卡说明

eth0   192.168.1.8（服务器外网卡）
eth1
eth2
两块服务器网卡(内网)

关闭防火墙

[root@ ~]# /etc/init.d/iptables stop

[root@ ~]# chkconfig iptables off

关闭selinux

[root@ ~]#setenforce 0
[root@ ~]#sed -i ‘s/SELINUX=enforcing/SELINUX=disabled/‘ /etc/selinux/config

禁用NetworkManager

[root@ ~]# /etc/init.d/NetworkManager stop

Stopping NetworkManager daemon:      [ OK ]

[root@ ~]# chkconfig NetworkManager off

[root@ ~]# /etc/init.d/network restart

编辑eth1网卡

[root@ ~]# cd /etc/sysconfig/network-scripts/
[root@ network-scripts\]# cat >ifcfg-eth1 <<EOF
DEVICE=eth1
ONBOOT=yes
BOOTPROTO=none
USERCTL=no
MASTER=bind0
EOF

编辑eth2网卡

[root@ network-scripts]# cat >ifcfg-eth2 <<EOF
DEVICE=eth2
ONBOOT=yes
BOOTPROTO=none
USERCTL=no
MASTER=bind0
EOF

编辑bind0网卡

[root@ network-scripts]# cat >ifcfg-bind0 <<EOF
DEVICE=bind0
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=none
IPADDR=10.0.0.8
NETMASK=255.255.255.0
GATEWAY=10.0.0.254
IPV6INIT=no
USERCTL=no
EOF

配置bond参数

[root@ network-scripts]# cat >/etc/modprobe.conf <<EOF
alias bind0 bonding
options bind0 miimon=100 mode=6
EOF

加入开机自启动(/etc/rc.local)

[root@ network-scripts]# cat >>/etc/rc.local <<EOF

ifenslave bind0 eth1 eth2

EOF

重启网络服务

[root@LVS-2 network-scripts]# service network restart

Shutting down interface eth0:               [ OK ]

Shutting down interface eth1:               [ OK ]

Shutting down interface eth2:               [ OK ]

Shutting down loopback interface:            [ OK ]

Bringing up loopback interface:              [ OK ]

Bringing up interface bind0: WARNING: Deprecated config file /etc/modprobe.conf, all config files belong into /etc/modprobe.d/.

WARNING: Deprecated config file /etc/modprobe.conf, all config files belong into /etc/modprobe.d/.

Determining if ip address 10.0.0.8 is already in use for device bind0..[ OK ]

Bringing up interface eth0: Determining if ip address 192.168.1.8 is already in use for device eth0...                          [ OK ]

Bringing up interface eth1: RTNETLINK answers: File exists     [ OK ]

Bringing up interface eth2: RTNETLINK answers: File exists [ OK ]

配置使绑定立即生效

[root@LVS-2 network-scripts]# ifenslave bind0 eth1 eth2

测试联通

[root@LVS-2 network-scripts]# ping 10.0.0.8

PING 10.0.0.8 (10.0.0.8) 56(84) bytes of data.

64 bytes from 10.0.0.8: icmp_seq=1 ttl=64 time=0.089 ms

64 bytes from 10.0.0.8: icmp_seq=2 ttl=64 time=0.046 ms

^C

--- 10.0.0.8 ping statistics ---

2 packets transmitted, 2 received, 0% packet loss, time 1921ms

rtt min/avg/max/mdev = 0.046/0.067/0.089/0.023 ms

此时会发现系统多一个网卡

[root@LVS-2 network-scripts]# ifconfig bind0

bind0 

Link encap:Ethernet HWaddr 00:0C:29:CC:9B:5 

inet addr:10.0.0.8 Bcast:10.0.0.255 Mask:255.255.255.0

inet6 addr: fe80::20c:29ff:fecc:9b55/64 Scope:LinkUP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1

RX packets:151 errors:0 dropped:0 overruns:0 frame:0

TX packets:3 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0 

RX bytes:11826 (11.5 KiB) TX bytes:258 (258.0 b)

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