Setting IP Alias di Linux

IP Alias di linux berfungsi agar Linux anda memiliki IP lebih dari 1, dan seolah - olah memiliki ethernet card bayangan.

Ok langsung aja berikut adalah langkah untuk membuat IP Alias di Linux :
1. Cek dulu konfigurasi IP anda saat ini
# ifconfig
Berikut adalah output di tempat saya :

eth0 Link encap:Ethernet HWaddr 00:19:D1:0F:01:F0
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::219:d1ff:fe0f:1f0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2849399 errors:0 dropped:0 overruns:0 frame:0
TX packets:2343011 errors:20 dropped:0 overruns:0 carrier:20
collisions:67275 txqueuelen:100
RX bytes:1445982491 (1.3 GB) TX bytes:270488780 (257.9 MB)
Base address:0x20c0 Memory:50300000-50320000


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:54454 errors:0 dropped:0 overruns:0 frame:0
TX packets:54454 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3848597 (3.6 MB) TX bytes:3848597 (3.6 MB)

2. Tambahkan IP Alias yang anda inginkan
# ifconfig eth0:1 192.168.2.2

3. Cek lagi konfigurasi IP anda, dan sekarang perhatikan eth0:1, ini adalah IP Alias anda
# ifconfig

eth0 Link encap:Ethernet HWaddr 00:19:D1:0F:01:F0
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::219:d1ff:fe0f:1f0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2849399 errors:0 dropped:0 overruns:0 frame:0
TX packets:2343011 errors:20 dropped:0 overruns:0 carrier:20
collisions:67275 txqueuelen:100
RX bytes:1445982491 (1.3 GB) TX bytes:270488780 (257.9 MB)
Base address:0x20c0 Memory:50300000-50320000


eth0:1 Link encap:Ethernet HWaddr 00:19:D1:0F:01:F0
inet addr:192.168.2.2 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Base address:0x20c0 Memory:50300000-50320000


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:54454 errors:0 dropped:0 overruns:0 frame:0
TX packets:54454 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3848597 (3.6 MB) TX bytes:3848597 (3.6 MB)


Selamat mencoba :D

Referensi :
http://tldp.org/HOWTO/IP-Alias/index.html