Linux一块网卡添加多个IP地址

**环境: **RHEL6.4
**需求: **Linux一块网卡添加多个IP地址

一、临时生效

• 1.1 网卡eth0添加一个IP地址
• 1.2 修改eth0:0的广播地址

二、永久生效

• 2.1 编辑ifcfg-eth0:0
• 2.2 重启网卡生效配置

当前eth0的配置:

# ifconfig
eth0      Link encap:Ethernet  HWaddr 2A:2E:BE:CF:8C:DC  
          inet addr:192.168.99.159  Bcast:192.168.99.255  Mask:255.255.255.0
          inet6 addr: fe80::282e:beff:fecf:8cdc/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:32955247 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3800040 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:15964502776 (14.8 GiB)  TX bytes:11315742252 (10.5 GiB)
          Interrupt:247 

一、临时生效

1.1 网卡eth0添加一个IP地址

``` ifconfig eth0 add 10.10.10.159 ``` **查看:** ``` # ifconfig -a eth0 Link encap:Ethernet HWaddr 2A:2E:BE:CF:8C:DC inet addr:192.168.99.159 Bcast:192.168.99.255 Mask:255.255.255.0 inet6 addr: fe80::282e:beff:fecf:8cdc/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:32958394 errors:0 dropped:0 overruns:0 frame:0 TX packets:3800101 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:15965401503 (14.8 GiB) TX bytes:11315752846 (10.5 GiB) Interrupt:247

eth0:0 Link encap:Ethernet HWaddr 2A:2E:BE:CF:8C:DC
inet addr:10.10.10.159 Bcast:192.168.99.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:247

发现多了一个基于eth0的eth0:0的虚拟接口。
<h2 id="1.2">1.2 修改eth0:0的广播地址</h2>

ifconfig eth0:0 broadcast 10.10.10.255

**查看:**

ifconfig -a

eth0 Link encap:Ethernet HWaddr 2A:2E:BE:CF:8C:DC
inet addr:192.168.99.159 Bcast:192.168.99.255 Mask:255.255.255.0
inet6 addr: fe80::282e:beff:fecf:8cdc/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:32959543 errors:0 dropped:0 overruns:0 frame:0
TX packets:3800126 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:15965717592 (14.8 GiB) TX bytes:11315758056 (10.5 GiB)
Interrupt:247

eth0:0 Link encap:Ethernet HWaddr 2A:2E:BE:CF:8C:DC
inet addr:10.10.10.159 Bcast:10.10.10.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:247

成功修改了eth0:0的广播地址。

<h1 id="2">二、永久生效</h1>
<h2 id="2.1">2.1 编辑ifcfg-eth0:0</h2>
配置文件在`/etc/sysconfig/network-scripts/`路径下。

cd /etc/sysconfig/network-scripts/

more ifcfg-eth0

DEVICE=eth0
TYPE=Ethernet
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=static
IPADDR=192.168.99.159
NETMASK=255.255.255.0

more ifcfg-eth0:0

DEVICE=eth0:0
TYPE=Ethernet
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=static
IPADDR=10.10.10.159
NETMASK=255.255.255.0

如果还想添加IP地址,可以同理编辑`ifcfg-eth0:1`文件.

<h2 id="2.2">2.2 重启网卡生效配置</h2>
### 2.2.1 可以重启整个网络服务: ###

service network restart

### 2.2.2 也可针对eth0网卡,关闭再启动: ###

ifdown eth0
ifup eth0

### 2.2.3 最后看eth0网卡信息如下: ###
ifconfig查看eth0的网卡信息:

ifconfig

eth0 Link encap:Ethernet HWaddr 2A:2E:BE:CF:8C:DC
inet addr:192.168.99.159 Bcast:192.168.99.255 Mask:255.255.255.0
inet6 addr: fe80::282e:beff:fecf:8cdc/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:32989071 errors:0 dropped:0 overruns:0 frame:0
TX packets:3800770 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:15974202540 (14.8 GiB) TX bytes:11315842294 (10.5 GiB)
Interrupt:247

eth0:0 Link encap:Ethernet HWaddr 2A:2E:BE:CF:8C:DC
inet addr:10.10.10.159 Bcast:10.10.10.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:247

eth0:1 Link encap:Ethernet HWaddr 2A:2E:BE:CF:8C:DC
inet addr:10.11.11.159 Bcast:10.11.11.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:247