1）内网网卡绑定

[root@external-lb01 ~]# cd /etc/sysconfig/network-scripts/

[root@external-lb01 network-scripts]# cat ifcfg-em1

DEVICE=em1

HWADDR=80:18:44:EB:0F:F4

TYPE=Ethernet

UUID=1bb1d77b-2cda-4640-b425-3ef692138937

ONBOOT=yes

NM_CONTROLLED=no

BOOTPROTO=none

MASTER=bond0

SLAVE=yes

[root@external-lb01 network-scripts]# cat ifcfg-em2

DEVICE=em2

HWADDR=80:18:44:EB:0F:F5

TYPE=Ethernet

UUID=e28f73ac-9149-47d9-84eb-3e7c027038e2

ONBOOT=yes

NM_CONTROLLED=no

BOOTPROTO=none

MASTER=bond0

SLAVE=yes

[root@external-lb01 network-scripts]# cat ifcfg-bond0

DEVICE=bond0

name='bond0'

TYPE=Ethernet

ONBOOT=yes

NM_CONTROLLED=no

BOOTPROTO=none

IPADDR=10.0.36.21

NETMASK=255.255.255.0

GATEWAY=10.0.36.1

BONDING_OPTS='mode=4 miimon=100'

2）外网网卡绑定

[root@external-lb01 network-scripts]# cat ifcfg-em3

DEVICE=em3

HWADDR=80:18:44:EB:0F:F6

TYPE=Ethernet

UUID=4f0384bb-7140-4161-9a87-561e0964120c

ONBOOT=yes

NM_CONTROLLED=no

BOOTPROTO=none

MASTER=bond1

SLAVE=yes

[root@external-lb01 network-scripts]# cat ifcfg-em4

DEVICE=em4

HWADDR=80:18:44:EB:0F:F7

TYPE=Ethernet

UUID=2e9236cb-4745-46b7-bfb7-9bf7333fd99a

ONBOOT=yes

NM_CONTROLLED=no

BOOTPROTO=none

MASTER=bond1

SLAVE=yes

[root@external-lb01 network-scripts]# cat ifcfg-bond1

DEVICE=bond1

name='bond1'

TYPE=Ethernet

ONBOOT=yes

NM_CONTROLLED=no

BOOTPROTO=none

IPADDR=115.182.11.21

NETMASK=255.255.255.240

GATEWAY=115.182.11.17

BONDING_OPTS='mode=4 miimon=100'

3）修改网卡绑定配置

[root@external-lb01 network-scripts]# cat /etc/modprobe.d/bonding.conf

alias bond0 bonding

options bonding mode=4 miimon=100

alias bond1 bonding

options bonding mode=4 miimon=100

网卡绑定生效：

[root@external-lb01 network-scripts]# modprobe bonding

[root@external-lb01 network-scripts]# /etc/init.d/network restart

[root@external-lb01 network-scripts]# modprobe bonding

查看网卡绑定结果：

[root@external-lb01 network-scripts]# cat /proc/net/bonding/bond0

Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: IEEE 802.3ad Dynamic link aggregation

Transmit Hash Policy: layer2 (0)

MII Status: up

........

........

[root@external-lb01 network-scripts]# cat /proc/net/bonding/bond1

Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: IEEE 802.3ad Dynamic link aggregation

Transmit Hash Policy: layer2 (0)

MII Status: up

........

........

4）查看路由

[root@external-lb01 ~]# route -n         //默认配置了外网网关地址

Kernel IP routing table

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface

115.182.11.16   0.0.0.0         255.255.255.240 U     0      0        0 bond1

10.0.36.0       0.0.0.0         255.255.255.0   U     0      0        0 bond0

169.254.0.0     0.0.0.0         255.255.0.0     U     1006   0        0 bond0

169.254.0.0     0.0.0.0         255.255.0.0     U     1007   0        0 bond1

0.0.0.0         115.182.11.17   0.0.0.0         UG    0      0        0 bond1

[root@external-lb01 ~]# cat /etc/resolv.conf

nameserver 8.8.8.8

nameserver 8.8.4.4

如上配置后，该机器可以ping通别的机器，及网络出去没有问题，因为配置了外网地址。

但是别的内网机器ping不通该机，这就需要配置该机的内网网关。

5）设置内网网关

临时设置内网网关（重启网卡服务后，这个临时设置的网关地址就消失了）

[root@external-lb01 ~]# route add -net 10.0.0.0/8 gw 10.0.36.1

永久设置内网网关（这样重启网卡服务后，这个网关地址还会在）

[root@external-lb01 ~]# vim /etc/sysconfig/network

GATEWAY=10.0.36.1

[root@external-lb01 ~]# vim /etc/sysconfig/static-routes

any net 10.0.0.0/8 gw 10.0.36.1

开启IP转发

[root@external-lb01 ~]# echo "1" >/proc/sys/net/ipv4/ip_forward    //临时开启

[root@external-lb01 ~]# vim /etc/sysctl.conf

net.ipv4.ip_forward = 1                 //永久开启

重启网卡

[root@external-lb01 ~]# /etc/init.d/network restart