[CentOS] Cluster: understanding virtual IP

Les Mikesell lesmikesell at gmail.com
Sun Jul 13 18:18:07 UTC 2008

John R Pierce 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`

Where is the best documentation on how the ip capabilities map to the 
files in /etc/sysconfig/network-scripts?  Do you have to use the eth0:n 
syntax there?  Also, isn't there some way to describe up vlan trunks and 
subinterfaces there?

   Les Mikesell
    lesmikesell at gmail.com

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