ip addr add vs ifconfig eth0:1

[lartc@xxxxxxxxxxxxxxxx]

A stupid question: which is recomended? 

I have 1 interface eth0. I need to set about 20 virtual interfaces eth0:xx 
on it. 

If I create them with ifconfig eth0:xx I see it with ifconfig and with ip 
addr ls. If I set it with 'ip addr add', ifconfig don't show them, but 'ip 
addr ls' and 'route' show them. So, which is better? 

Thanks in advance.
PS: I can't find anywhere docs about relationship between 'old' utilities 
ifconfig, route, etc and the iproute2 package. Point me to some comparision 
between them, please. 


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