IP Alias – linux中單網卡多IP

最近由於測試的需要,

在一台linux 機器下配置單網卡多個IP,

指令碼如下

#!/bin/sh# ip_alias.sh#author.....#20130110#for addint or delete 1,000 net-card alias#from 10.3.231.1~200#from 10.3.232.1~200#from 10.3.233.1~200#from 10.3.234.1~200#from 10.3.235.1~200#10.3.231.1         168027905    #10.3.231.200        168028104#10.3.232.1         168028161#10.3.232.200        168028360#10.3.233.1         168028417#10.3.233.200        168028616#10.3.234.1         168028673#10.3.234.200        168028872#10.3.235.1         168028929#10.3.235.200        168029128#usage: sh ip_alias.sh add#usage: sh ip_alias.sh delcc_max=235bb_max=200ip_pre="10.3."net_card_num=0;if [ "$1" == "add" ];thenfor (( i = 231; i <= cc_max ; i ++ ))do        for ((j = 1; j <= bb_max; j ++))        do                ip=${ip_pre}${i}"."${j}                let net_card_num+=1;                echo $net_card_num;                ifconfig eth0:$net_card_num $ip netmask 255.255.0.0 up                echo $ip        donedoneelif [ "$1" == "del" ];then        for (( i = 231; i <= cc_max ; i ++ ))        do                for ((j = 1; j <= bb_max; j ++))                do                        ip=${ip_pre}${i}"."${j}                        let net_card_num+=1;                        echo $net_card_num;                        ifconfig eth0:$net_card_num $ip netmask 255.255.0.0 down                        echo $ip                donedoneelse        echo "error parameter"        echo "#usage: sh ip_alias.sh add"        echo "#usage: sh ip_alias.sh del"fi

參考了...

http://bbs.neten.de/viewthread.php?tid=574

 

 

IP Alias - linux中單網卡多IP可以運行命令ifconfig 添加IP Alias 

在eth0:0上添加IP地址192.168.0.128/255.255.255.0

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代碼:

# ifconfig eth0:0 192.168.0.128netmask 255.255.255.0 up

刪除IP Alias eth0:0

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代碼:

# ifconfig eth0:0 down

為一塊網卡配置多IP可以通過命令列設定也可以通過設定檔設定，以下我分別通過這兩種方式實現：

1.用命令列設定

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代碼:

ifconfig命令格式：ifconfig 裝置名稱 IP netmask 掩碼 broadcast 廣播位址 動作

# ifconfig

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代碼:

eth0 Link encap:Ethernet HWaddr 00:0E:1F:01:6C:50
inet addr:192.168.16.108 Bcast:192.168.16.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:224 (224.0 b) TX bytes:387 (387.0 b)
Interrupt:11 Base address:0x2000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:773 errors:0 dropped:0 overruns:0 frame:0
TX packets:773 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:52352 (51.1 Kb) TX bytes:52352 (51.1 Kb)

可以看到，當前eth0的IP為192.168.16.108，此時請注意一下MAC(00:0E:1F:01:6C:50)

現在我們為eth0綁定另一個IP，裝置為eth0:0，可以看到，現在又多了一個IP，注意，網卡實際上只有一塊（可以看MAC，都為00:0E:1F:01:6C:50)，卻綁定了兩個IP，可以依此配置多個IP。

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代碼:

# ifconfig eth0:0 192.168.1.100 netmask 255.255.255.0

# ifconfig

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代碼:

eth0 Link encap:Ethernet HWaddr 00:0E:1F:01:6C:50
inet addr:192.168.16.108 Bcast:192.168.16.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:29 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:2879 (2.8 Kb) TX bytes:387 (387.0 b)
Interrupt:11 Base address:0x2000

eth0:0 Link encap:Ethernet HWaddr 00:0E:1F:01:6C:50
inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:29 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:2879 (2.8 Kb) TX bytes:387 (387.0 b)
Interrupt:11 Base address:0x2000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:7329 errors:0 dropped:0 overruns:0 frame:0
TX packets:7329 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:500674 (488.9 Kb) TX bytes:500674 (488.9 Kb)

2.通過設定檔設定多IP
網卡IP配置的檔案在/etc/sysconfig/network-scripts/下，檔案分別為ehtx或ethx:x
# cd /etc/sysconfig/network-scripts/
# ls

ifcfg-eth0 ifdown-ippp ifdown-ppp ifup-aliases ifup-isdn ifup-ppp ifup-wireless
ifcfg-lo ifdown-ipv6 ifdown-sit ifup-ippp ifup-plip ifup-routes init.ipv6-global
ifdown ifdown-isdn ifdown-sl ifup-ipv6 ifup-plusb ifup-sit network-functions
ifdown-aliases ifdown-post ifup ifup-ipx ifup-post ifup-sl network-functions-ipv6

#這是eth0的對應的內容
#vi ifcfg-eth0

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代碼:

DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
USERCTL=no
PEERDNS=yes
TYPE=Ethernet
IPADDR=192.168.16.108
NETMASK=255.255.255.0
HWADDR=00:0e:1f:01:6c:50
GATEWAY=192.168.16.1
NETWORK=192.168.16.0
BROADCAST=192.168.16.255

配置另一IP，因我們剛才已配置了eth0:0，所以此時要用eth0:1了
# cp ifcfg-eth0 ifcfg-eth0:1
修改設定檔，內容如下
# vi ifcfg-eth0:1

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代碼:

DEVICE=eth0:1
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.2.100
NETMASK=255.255.255.0
NETWORK=192.168.2.0

啟動eth0:1，查看，此時是不是就已經有三個IP了？
# ifup eth0:1
# ifconfig

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代碼:

eth0 Link encap:Ethernet HWaddr 00:0E:1F:01:6C:50
inet addr:192.168.16.108 Bcast:192.168.16.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:52 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:6037 (5.8 Kb) TX bytes:627 (627.0 b)
Interrupt:11 Base address:0x2000

eth0:0 Link encap:Ethernet HWaddr 00:0E:1F:01:6C:50
inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:52 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:6037 (5.8 Kb) TX bytes:627 (627.0 b)
Interrupt:11 Base address:0x2000

eth0:1 Link encap:Ethernet HWaddr 00:0E:1F:01:6C:50
inet addr:192.168.2.100 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:52 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:6037 (5.8 Kb) TX bytes:627 (627.0 b)
Interrupt:11 Base address:0x2000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:14131 errors:0 dropped:0 overruns:0 frame:0
TX packets:14131 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:965895 (943.2 Kb) TX bytes:965895 (943.2 Kb)

OK，配置成功，這個隨便你用哪種方法都可以，用設定檔的方法可以寫一些注釋，而用ifconfig則簡單方便，這就看你的愛好了。

轉自：Linux教程-紅旗.Redhat作業系統命令學習