[CentOS] Cluster: understanding virtual IP

[Les Mikesell]

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