[CentOS] Cluster: understanding virtual IP

John R Pierce pierce at hogranch.com
Sun Jul 13 16:06:47 UTC 2008

Filipe Brandenburger wrote:
> On Sun, Jul 13, 2008 at 10:56 AM, Dirk H. Schulz
> <dirk.schulz at kinzesberg.de> wrote:
>> Okay, I found that ifconfig does not show the virtual IP address
> Are you sure?
> These are interface aliases, they should show up as a "different"
> interface such as eth0:0 or eth0:1. If you run "ifconfig" without any
> parameters, doesn't it show up?

with the IP stack in Linux as of kernel 2.4.something, and the 'ip' 
command, virtual addresses no longer need be associated with virtual 
interfaces like eth0:1, instead you can `ip addr add eth0 a.b.c.d`

the ifconfig command, written back in the stone ages, is blissfully 
unaware of this.  it really should be deprecated in favor of `ip addr`

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