Multiple IPs on single interface

[Smith, Albert]

256 is the maxium amount of ip address that can be bound to a single nic

Albert Smith
Sr. Unix Systems Administrator
Genex Services
440 E. Swedesford Rd.
Wayne, PA 19087
albert.smith at genexservices.com
(610) 964-5154



-----Original Message-----
From: redhat-list-bounces at redhat.com on behalf of Jason Williard
Sent: Tue 2/15/2005 1:17 AM
To: 'General Red Hat Linux discussion list'
Subject: RE: Multiple IPs on single interface
 
That worked.  Thank you very much.  Do you know if there is a max limit on
how many IP's can be attached to a single interface?  Also, is there a way
to add an entire subnet without creating 1 file for each IP?

---
Thank You,
Jason Williard
PCSafe, Inc.
 
 

-----Original Message-----
From: redhat-list-bounces at redhat.com [mailto:redhat-list-bounces at redhat.com]
On Behalf Of IAK Tanoli
Sent: Monday, February 14, 2005 10:08 PM
To: General Red Hat Linux discussion list
Subject: Re: Multiple IPs on single interface


Modify the file as following. 

DEVICE=eth0:1
ONBOOT=yes
BOOTPROTO=static
IPADDR=xxx.xxx.xxx.xxx
NETMASK=255.255.254.0
GATEWAY=xxx.xxx.xxx.xxx
HWADDR=00:00:00:00:00:00

--- Jason Williard <jason at pcsafe.com> wrote:

> Hello,
> 
> I have a box with Red Hat Enterprise Linux ES
> release 3 installed on it.
> Today, I acquired 2 additional IP addresses for it. 
> I can add the IP
> addresses using the following commands, but they are
> not permanent.
> 
> # ifconfig eth0 add xxx.xxx.xxx.xxx netmask
> 255.255.254.0
> # ifconfig eth0:0 add xxx.xxx.xxx.xxx netmask
> 255.255.254.0
> 
> As this was not making it permanent, I created 2
> files (ifcfg-eth0:0 &
> ifcfg-eth0:0:1) inside the
> /etc/sysconfig/network-scripts/ directory.  The
> first file works and interface eth0:0 comes up at
> startup.  However, the
> second interface stays down.  Below is the content
> of the two files:
> 
> ifcfg-eth0:0
> ---
> DEVICE=eth0:0
> ONBOOT=yes
> BOOTPROTO=static
> IPADDR=xxx.xxx.xxx.xxx
> NETMASK=255.255.254.0
> GATEWAY=xxx.xxx.xxx.xxx
> HWADDR=00:00:00:00:00:00
> ---
> 
> ifcfg-eth0:0:1
> ---
> DEVICE=eth0:0:1
> ONBOOT=yes
> BOOTPROTO=static
> IPADDR=xxx.xxx.xxx.xxx
> NETMASK=255.255.254.0
> GATEWAY=xxx.xxx.xxx.xxx
> HWADDR=00:00:00:00:00:00
> ---
> 
> 
> ---
> Thank You,
> Jason Williard
> PCSafe, Inc.
>  
>  
> 
> 
> 
> 
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>
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=====
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