multiple ip addresses + one NIC?

darkchemist · #1 28th May 2006, 07:32 PM

hello, i have a game server where there is 7 IP's total going into this box. I have one NIC, and it is only assigning the first ip (xxx.xxx.xxx.30)in my pool of addresses give to that box. I need this box to have acess to all 7 IP's

Quote:

xxx.xxx.xxx.31
xxx.xxx.xxx.32
xxx.xxx.xxx.33
xxx.xxx.xxx.34
xxx.xxx.xxx.193
xxx.xxx.xxx.194

Is there an easy command line way to do this? i only have SSH acess to this machine so the gui is of no use to me.

thankyou!
-matt

Brian1 · #2 28th May 2006, 08:59 PM

Each addtional IP will be an Alising IP called eth0:0, eth0:1, eth0:2, and so on.
Check out this site on Alising IP setup

https://www.redhat.com/archives/fedo.../msg04163.html
http://www.faqs.org/docs/Linux-mini/IP-Alias.html

There are serval other links. Just use google and search for Alias IP

Brian1

darkchemist · #3 28th May 2006, 09:52 PM

thankyou for your reply, and i DID figure out how to get the ip's to work with IP aliasing, however...

it said to place the script:

Quote:

#setting up IP alias interfaces
echo "Setting 69.28.221.31, 69.28.221.32, 69.28.221.33, 69.28.221.34, 69.28.221.193, 69.28.221.194 IP Aliases ..."
/sbin/ifconfig eth0:0 69.28.221.31
/sbin/ifconfig eth0:1 69.28.221.32
/sbin/ifconfig eth0:2 69.28.221.33
/sbin/ifconfig eth0:4 69.28.221.34
/sbin/ifconfig eth0:5 69.28.221.193
/sbin/ifconfig eth0:6 69.28.221.194

in the "/etc/rc.d/rc.local" file to auto config the card to work, however it will not auto start on boot.

if i just type in "/sbin/ifconfig eth0:0 69.28.221.31" it loads without problem.

How can i tell that the rc.local file is being read at boot?

Brian1 · #4 28th May 2006, 10:41 PM

Do you see the echo line on boot?
If so does any of the virtual IP get created?
Are these IP's a simple nat1to1 or are they given to you in a segment of a class C address?
I assume eth0 works fine.

Brian1

darkchemist · #5 28th May 2006, 11:16 PM

I do not have acess to see the machine boot, so im not sure if it echo;s the info.

They are nat1to1

really all that i need is for the server to run /sbin/ifconfig eth0:0 69.28.221.31 for each of the ip's needed on boot. but im not sure that the rc.local file is being ran on boot

Brian1 · #6 29th May 2006, 12:01 AM

I would think your /var/log/messages would contain the info if started. I think the echo will show up in there.
Do you have anything else in rc.local that you know is running?
You can put say ' cp /etc/fstab to /home/<username>/fstab ' in your rc.local. Once booted you can see if rc.local did run.

Brian1