[TriLUG] multiple IP from the same network card?

[Jason Tower]

what you are describing is a virtual interface, and it's a snap.  for a quick 
and dirty setup, you can simply run the following:

[root at bigtoe root]# ifconfig eth0:0 10.1.1.1

which results in something like the following:

[root at bigtoe root]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:A0:C9:5A:DF:F7
          inet addr:10.0.0.100  Bcast:10.0.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:454545 errors:0 dropped:0 overruns:0 frame:0
          TX packets:311037 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:94017376 (89.6 Mb)  TX bytes:31798276 (30.3 Mb)
          Interrupt:10 Base address:0xdc00 Memory:ef201000-ef201038

eth0:0    Link encap:Ethernet  HWaddr 00:A0:C9:5A:DF:F7
          inet addr:10.1.1.1  Bcast:10.1.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
          Interrupt:10 Base address:0xdc00 Memory:ef201000-ef201038

to make this permanent, copy /etc/sysconfig/network-scripts/ifcfg-eth0 to 
ifcfg-eth0:0 and modify the file contents with the desired info.  you can 
have several virtual interfaces, all on different subnets.  good luck!

jason

On Wednesday 18 June 2003 13:29, Michael Winslow Czeiszperger wrote:
> Hi--
>
> I'm working on a new feature for our load testing product and have been
> stumped on a Linux configuration issue. The product needs to send out
> HTTP requests from multiple IP addresses in order to fake out IP-based
> load balancers. To do this I need to configure a Linux box to have
> multiple IP addresses on the same network card, but for the life of me
> I can't find the HOWTO or docs to do this. Strangely enough it seemed
> fairly easy on Windows :-(
>
> Any pointers to the right documentation would be greatly appreciated...
>
> Thanks,
>
> --------------------------------
> Michael Czeiszperger
> czei at webperformanceinc dot com
> Web Performance, Inc.
> 9207 Baileywick Road, Suite 203
> Raleigh, NC 27615
> 919-845-7601
>
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