1 网卡eth0配置多个ip地址
一个网卡多个ip，如何一个网卡配置多个ip
方法1：ifconfig eth0:0 10.0.0.101/24 up （ifconfig 方式设置ip叫做别名IP）
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[root@web01 conf]
# ifconfig eth0:0 10.0.0.101/24 up
[root@web01 conf]
# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:79:73:42
inet addr:10.0.0.8 Bcast:10.0.0.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe79:7342
/64
Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2694 errors:0 dropped:0 overruns:0 frame:0
TX packets:1959 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:243597 (237.8 KiB) TX bytes:229882 (224.4 KiB)
eth0:0 Link encap:Ethernet HWaddr 00:0C:29:79:73:42
inet addr:10.0.0.101 Bcast:10.0.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
eth1 Link encap:Ethernet HWaddr 00:0C:29:79:73:4C
inet addr:172.16.1.8 Bcast:172.16.1.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe79:734c
/64
Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:154 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:9398 (9.1 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:129 errors:0 dropped:0 overruns:0 frame:0
TX packets:129 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:11352 (11.0 KiB) TX bytes:11352 (11.0 KiB)
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在管理机m01上面ping是否可以ping通
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[root@m01 ~]
# ping 10.0.0.101 -c4
PING 10.0.0.101 (10.0.0.101) 56(84) bytes of data.
64 bytes from 10.0.0.101: icmp_seq=1 ttl=64
time
=0.421 ms
64 bytes from 10.0.0.101: icmp_seq=2 ttl=64
time
=0.416 ms
64 bytes from 10.0.0.101: icmp_seq=3 ttl=64
time
=0.384 ms
64 bytes from 10.0.0.101: icmp_seq=4 ttl=64
time
=0.397 ms
--- 10.0.0.101
ping
statistics ---
4 packets transmitted, 4 received, 0% packet loss,
time
3000ms
rtt min
/avg/max/mdev
= 0.384
/0
.404
/0
.421
/0
.025 ms
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方法2： 辅助IP设置ip addr add 10.0.0.102/24 dev eth0 label eth0:1（不带表情label ifconifg看不了）
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[root@web01 conf]
# ip addr add 10.0.0.102/24 dev eth0 label eth0:1
[root@web01 conf]
# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:79:73:42
inet addr:10.0.0.8 Bcast:10.0.0.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe79:7342
/64
Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2920 errors:0 dropped:0 overruns:0 frame:0
TX packets:2103 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:262933 (256.7 KiB) TX bytes:247258 (241.4 KiB)
eth0:0 Link encap:Ethernet HWaddr 00:0C:29:79:73:42
inet addr:10.0.0.101 Bcast:10.0.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
eth0:1 Link encap:Ethernet HWaddr 00:0C:29:79:73:42
inet addr:10.0.0.102 Bcast:0.0.0.0 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
eth1 Link encap:Ethernet HWaddr 00:0C:29:79:73:4C
inet addr:172.16.1.8 Bcast:172.16.1.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe79:734c
/64
Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6 errors:0 dropped:0 overruns:0 frame:0
TX packets:154 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:360 (360.0 b) TX bytes:9398 (9.1 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:129 errors:0 dropped:0 overruns:0 frame:0
TX packets:129 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:11352 (11.0 KiB) TX bytes:11352 (11.0 KiB)
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用ip add可以看出来ip的别名和辅助ip区别
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[root@web01 conf]
# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link
/loopback
00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1
/8
scope host lo
inet6 ::1
/128
scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link
/ether
00:0c:29:79:73:42 brd ff:ff:ff:ff:ff:ff
inet 10.0.0.8
/24
brd 10.0.0.255 scope global eth0
inet 10.0.0.101
/24
brd 10.0.0.255 scope global secondary eth0:0
inet 10.0.0.102
/24
scope global secondary eth0:1
inet6 fe80::20c:29ff:fe79:7342
/64
scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link
/ether
00:0c:29:79:73:4c brd ff:ff:ff:ff:ff:ff
inet 172.16.1.8
/24
brd 172.16.1.255 scope global eth1
inet6 fe80::20c:29ff:fe79:734c
/64
scope link
valid_lft forever preferred_lft forever
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到管理机m01查看辅助ip地址是否通
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[root@m01 ~]
# ping -c4 10.0.0.102
PING 10.0.0.102 (10.0.0.102) 56(84) bytes of data.
64 bytes from 10.0.0.102: icmp_seq=1 ttl=64
time
=1.65 ms
64 bytes from 10.0.0.102: icmp_seq=2 ttl=64
time
=0.330 ms
64 bytes from 10.0.0.102: icmp_seq=3 ttl=64
time
=0.379 ms
64 bytes from 10.0.0.102: icmp_seq=4 ttl=64
time
=0.318 ms
--- 10.0.0.102
ping
statistics ---
4 packets transmitted, 4 received, 0% packet loss,
time
3003ms
rtt min
/avg/max/mdev
= 0.318
/0
.670
/1
.655
/0
.569 ms
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2 修改nginx配置文件
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[root@web01 conf]
# cat nginx.conf
worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application
/octet-stream
;
sendfile on;
keepalive_timeout 65;
server {
listen 10.0.0.8:80;
server_name www.etiantian.org;
location / {
root html
/www
;
index index.html index.htm;
}
}
server {
listen 10.0.0.101:80;
server_name www.etiantian.org;
location / {
root html
/bbs
;
index index.html index.htm;
}
}
server {
listen 10.0.0.102:80;
server_name www.etiantian.org;
location / {
root html
/blog
;
index index.html index.htm;
}
}
}
[root@web01 conf]
# /application/nginx/sbin/nginx -t
nginx: the configuration
file
/application/nginx-1
.6.3
//conf/nginx
.conf syntax is ok
nginx: configuration
file
/application/nginx-1
.6.3
//conf/nginx
.conf
test
is successful
[root@web01 conf]
# /application/nginx/sbin/nginx -s reload
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2.1 验证，在m01管理机上面验证
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[root@m01 ~]
# curl 10.0.0.8
www
[root@m01 ~]
# curl 10.0.0.101
www
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发现101是错误的，原因：有时候平滑优雅重启不生效。在web01机器上面关闭nginx服务再开启nginx服务。
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[root@web01 conf]
# /application/nginx/sbin/nginx -s stop
[root@web01 conf]
# /application/nginx/sbin/nginx
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继续在管理机m01上验证
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[root@m01 ~]
# curl 10.0.0.8
www
[root@m01 ~]
# curl 10.0.0.101
bbs
[root@m01 ~]
# curl 10.0.0.102
blog
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上面已验证成功。
总结：
配置ip (ifconfig是配置别名ip地址，ip addr是配置辅助ip地址)
ifconfig eth0:0 10.0.0.101/24 up
ip addr add 10.0.0.102/24 dev eth0 label eth0:1
删除ip
ifconfig eth0:0 down
ip addr del 10.0.0.102/24 dev eth0 label eth0:1
本文转自sandshell博客51CTO博客，原文链接http://blog.51cto.com/sandshell/1957785如需转载请自行联系原作者
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