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    Linux：子网卡（单网卡绑定多IP）

    Adamhuan发表于 2016-09-10 08:19:51
    love 0

    子网卡，具体说就是一快网卡上配置多个IP地址。
    它的实现细节，将会在接下来的内容中展开。

    首先看看我的Linux的当前网络环境：

    [root@mysql-1 ~]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0C:29:97:5C:02  
          inet addr:192.168.111.128  Bcast:192.168.111.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe97:5c02/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:51 errors:0 dropped:0 overruns:0 frame:0
          TX packets:41 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:4600 (4.4 KiB)  TX bytes:3294 (3.2 KiB)

eth1      Link encap:Ethernet  HWaddr 00:0C:29:97:5C:0C  
          inet addr:192.168.111.162  Bcast:192.168.111.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe97:5c0c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:38 errors:0 dropped:0 overruns:0 frame:0
          TX packets:44 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:4927 (4.8 KiB)  TX bytes:5043 (4.9 KiB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:16 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:960 (960.0 b)  TX bytes:960 (960.0 b)

[root@mysql-1 ~]# 
[root@mysql-1 ~]# ls -al /sys/class/net/
total 0
drwxr-xr-x  2 root root 0 Aug 31 10:00 .
drwxr-xr-x 43 root root 0 Aug 31 10:00 ..
lrwxrwxrwx  1 root root 0 Aug 31 10:00 eth0 -> ../../devices/pci0000:00/0000:00:11.0/0000:02:00.0/net/eth0
lrwxrwxrwx  1 root root 0 Aug 31 10:00 eth1 -> ../../devices/pci0000:00/0000:00:11.0/0000:02:03.0/net/eth1
lrwxrwxrwx  1 root root 0 Aug 31 10:00 lo -> ../../devices/virtual/net/lo
[root@mysql-1 ~]# 
[[root@mysql-1 ~]# cd /etc/sysconfig/network-scripts/
[root@mysql-1 network-scripts]# ls 
ifcfg-eth0         ifdown-ib    ifdown-routes  ifup-eth   ifup-plusb   ifup-wireless
ifcfg-lo           ifdown-ippp  ifdown-sit     ifup-ib    ifup-post    init.ipv6-global
ifcfg-System_eth1  ifdown-ipv6  ifdown-tunnel  ifup-ippp  ifup-ppp     net.hotplug
ifdown             ifdown-isdn  ifup           ifup-ipv6  ifup-routes  network-functions
ifdown-bnep        ifdown-post  ifup-aliases   ifup-isdn  ifup-sit     network-functions-ipv6
ifdown-eth         ifdown-ppp   ifup-bnep      ifup-plip  ifup-tunnel
[root@mysql-1 network-scripts]#

    这里，打算给第一块网卡【eth0】配置两个子网：

    [root@mysql-1 network-scripts]# vi ifcfg-eth0:0
[root@mysql-1 network-scripts]# vi ifcfg-eth0:1
[root@mysql-1 network-scripts]# 
[root@mysql-1 network-scripts]# ls
ifcfg-eth0         ifdown-eth   ifdown-routes  ifup-ib     ifup-ppp          network-functions
ifcfg-eth0:0       ifdown-ib    ifdown-sit     ifup-ippp   ifup-routes       network-functions-ipv6
ifcfg-eth0:1       ifdown-ippp  ifdown-tunnel  ifup-ipv6   ifup-sit
ifcfg-lo           ifdown-ipv6  ifup           ifup-isdn   ifup-tunnel
ifcfg-System_eth1  ifdown-isdn  ifup-aliases   ifup-plip   ifup-wireless
ifdown             ifdown-post  ifup-bnep      ifup-plusb  init.ipv6-global
ifdown-bnep        ifdown-ppp   ifup-eth       ifup-post   net.hotplug
[root@mysql-1 network-scripts]# 
[root@mysql-1 network-scripts]# cat ifcfg-eth0:0
DEVICES=eth0:0
BOOTPROTO=static
IPADDR=192.168.111.151
NETMASK=255.255.255.0
ONBOOT=yes
[root@mysql-1 network-scripts]# cat ifcfg-eth0:1
DEVICES=eth0:1
BOOTPROTO=static
IPADDR=192.168.111.152
NETMASK=255.255.255.0
ONBOOT=yes
[root@mysql-1 network-scripts]#

    重启网络服务【network】：

    [root@mysql-1 ~]# service NetworkManager status
NetworkManager (pid  1598) is running...
[root@mysql-1 ~]# 
[root@mysql-1 ~]# service NetworkManager stop
Stopping NetworkManager daemon:                            [  OK  ]
[root@mysql-1 ~]# 
[root@mysql-1 ~]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0C:29:97:5C:02  
          inet addr:192.168.111.128  Bcast:192.168.111.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe97:5c02/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:619 errors:0 dropped:0 overruns:0 frame:0
          TX packets:368 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:52510 (51.2 KiB)  TX bytes:51499 (50.2 KiB)

eth1      Link encap:Ethernet  HWaddr 00:0C:29:97:5C:0C  
          inet addr:192.168.111.162  Bcast:192.168.111.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe97:5c0c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:76 errors:0 dropped:0 overruns:0 frame:0
          TX packets:77 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:9301 (9.0 KiB)  TX bytes:7287 (7.1 KiB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:16 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:960 (960.0 b)  TX bytes:960 (960.0 b)

[root@mysql-1 ~]# 
[root@mysql-1 ~]# service network restart
Shutting down interface System_eth1:                       [  OK  ]
Shutting down interface eth0:                              [  OK  ]
Shutting down loopback interface:                          [  OK  ]
Bringing up loopback interface:                            [  OK  ]
Bringing up interface System_eth1:  Determining if ip address 192.168.111.162 is already in use for device eth1...
                                                           [  OK  ]
Bringing up interface eth0:  Determining if ip address 192.168.111.128 is already in use for device eth0...
Determining if ip address 192.168.111.151 is already in use for device eth0...
Determining if ip address 192.168.111.152 is already in use for device eth0...
                                                           [  OK  ]
[root@mysql-1 ~]# 
[root@mysql-1 ~]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0C:29:97:5C:02  
          inet addr:192.168.111.128  Bcast:192.168.111.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe97:5c02/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:683 errors:0 dropped:0 overruns:0 frame:0
          TX packets:421 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:57554 (56.2 KiB)  TX bytes:57747 (56.3 KiB)

eth0:0    Link encap:Ethernet  HWaddr 00:0C:29:97:5C:02  
          inet addr:192.168.111.151  Bcast:192.168.111.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:1    Link encap:Ethernet  HWaddr 00:0C:29:97:5C:02  
          inet addr:192.168.111.152  Bcast:192.168.111.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth1      Link encap:Ethernet  HWaddr 00:0C:29:97:5C:0C  
          inet addr:192.168.111.162  Bcast:192.168.111.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe97:5c0c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:114 errors:0 dropped:0 overruns:0 frame:0
          TX packets:109 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:12071 (11.7 KiB)  TX bytes:11707 (11.4 KiB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:16 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:960 (960.0 b)  TX bytes:960 (960.0 b)

[root@mysql-1 ~]#

    如上，这样，子网卡就配好了。

    测试下：

    C:\Users\adamhuan>ping -n 2 192.168.111.128

正在 Ping 192.168.111.128 具有 32 字节的数据:
来自 192.168.111.128 的回复: 字节=32 时间<1ms TTL=64
来自 192.168.111.128 的回复: 字节=32 时间<1ms TTL=64

192.168.111.128 的 Ping 统计信息:
    数据包: 已发送 = 2，已接收 = 2，丢失 = 0 (0% 丢失)，
往返行程的估计时间(以毫秒为单位):
    最短 = 0ms，最长 = 0ms，平均 = 0ms

C:\Users\adamhuan>
C:\Users\adamhuan>ping -n 3 192.168.111.151

正在 Ping 192.168.111.151 具有 32 字节的数据:
来自 192.168.111.151 的回复: 字节=32 时间<1ms TTL=64
来自 192.168.111.151 的回复: 字节=32 时间<1ms TTL=64
来自 192.168.111.151 的回复: 字节=32 时间<1ms TTL=64

192.168.111.151 的 Ping 统计信息:
    数据包: 已发送 = 3，已接收 = 3，丢失 = 0 (0% 丢失)，
往返行程的估计时间(以毫秒为单位):
    最短 = 0ms，最长 = 0ms，平均 = 0ms

C:\Users\adamhuan>
C:\Users\adamhuan>ping -n 3 192.168.111.152

正在 Ping 192.168.111.152 具有 32 字节的数据:
来自 192.168.111.152 的回复: 字节=32 时间<1ms TTL=64
来自 192.168.111.152 的回复: 字节=32 时间<1ms TTL=64
来自 192.168.111.152 的回复: 字节=32 时间<1ms TTL=64

192.168.111.152 的 Ping 统计信息:
    数据包: 已发送 = 3，已接收 = 3，丢失 = 0 (0% 丢失)，
往返行程的估计时间(以毫秒为单位):
    最短 = 0ms，最长 = 0ms，平均 = 0ms

C:\Users\adamhuan>

    可以看到，子网卡配置成功。

    ——————————————————
    Done。



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