ifconfig 查看IP地址
em1 Link encap:Ethernet HWaddr ****
inet addr:192.168.1.32 Bcast:10.10.1.255 Mask:255.255.255.0 # 集群局域网ip地址
inet6 addr: **** Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:11297 errors:0 dropped:0 overruns:0 frame:0
TX packets:4578 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1695966 (1.6 MiB) TX bytes:652377 (637.0 KiB)
Interrupt:35
em2 Link encap:Ethernet HWaddr ****
inet addr:114.2.1.1 Bcast:114.2.255.255 Mask:255.255.240.0 # 外网ip地址，我们都是连接这个ip
inet6 addr: ***** Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:748 errors:0 dropped:0 overruns:0 frame:0
TX packets:1824 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:80412 (78.5 KiB) TX bytes:194872 (190.3 KiB)
Interrupt:38
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:16436 Metric:1
RX packets:121109 errors:0 dropped:0 overruns:0 frame:0
TX packets:121109 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:26637971 (25.4 MiB) TX bytes:26637971 (25.4 MiB)
/etc/sysconfig/network-scripts/ifcfg-em2 中保存了IP配置信息
more /etc/sysconfig/network-scripts/ifcfg-em2 动态IP配置
DEVICE=em2
HWADDR=43:21:32:43:21:32
#IPADDR=114.123.123.123 #注释
#NETMASK=255.255.255.0 #注释
BOOTPROTO=dhcp #dhcp动态获取IP
ONBOOT=yes #启用该网口
MTU=1500
`more /etc/sysconfig/network-scripts/ifcfg-em2` 静态IP配置
DEVICE=em2
HWADDR=43:21:32:43:21:32
IPADDR=114.123.123.123 #设置的静态IP地址
NETMASK=255.255.255.0 #子网掩码
BOOTPROTO=static #静态IP
ONBOOT=yes #启用该网口
MTU=1500
重启网络 service network restart
实例 东华理工大学 并行计算实验室
外网 vi /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
TYPE=Bridge
IPADDR=AAA.BBB.CCC.150
NETMASK=255.255.255.0
GATEWAY=AAA.BBB.CCC.1
BOOTPROTO=static
ONBOOT=yes
MTU=1500