IP Alias

Linux 시스템에서는 하나의 물리적인 Ethernet Device에 대해서 가상의 Device를 추가하여 할당 할 수 있으며 설정 과정은 아래와 같다. 

 

1. ifconfig 명령을 통한 추가

[root@TEST02 ~]# [root@TEST02 ~]# ifconfig eth0:1 192.168.137.40 netmask 255.255.255.0 up [root@TEST02 ~]#

 

 

2. ip 명령을 통한 추가

[root@TEST02 ~]# [root@TEST02 ~]# ip addr add 192.168.137.40/24 dev eth0 [root@TEST02 ~]#

 

 

3. 추가된 Ethernet Alias 확인

[root@TEST02 ~]# ifconfig eth0 Link encap:Ethernet HWaddr 08:00:27:E2:B9:11 inet addr:192.168.137.20 Bcast:192.168.137.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:94893 errors:0 dropped:0 overruns:0 frame:0 TX packets:49062 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:22029990 (21.0 MiB) TX bytes:42433842 (40.4 MiB) eth0:1 Link encap:Ethernet HWaddr 08:00:27:E2:B9:11 inet addr:192.168.137.40 Bcast:192.168.137.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 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:4 errors:0 dropped:0 overruns:0 frame:0 TX packets:4 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:200 (200.0 b) TX bytes:200 (200.0 b)

 

 

4. 추가된 가상 Ethernet Device에 대한 Ping 테스트

[root@TEST02 ~]# [root@TEST02 ~]# ping -c 3 -i 0.1 192.168.137.40 PING 192.168.137.40 (192.168.137.40) 56(84) bytes of data. 64 bytes from 192.168.137.40: icmp_seq=1 ttl=64 time=0.017 ms 64 bytes from 192.168.137.40: icmp_seq=2 ttl=64 time=0.022 ms 64 bytes from 192.168.137.40: icmp_seq=3 ttl=64 time=0.122 ms --- 192.168.137.40 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 200ms rtt min/avg/max/mdev = 0.017/0.053/0.122/0.049 ms [root@TEST02 ~]# [root@TEST02 ~]#