Re: [CentOS-virt] IP based VirtualHost: IP aliases vs. additional virtual interfaces

On 08/10/2010 02:01 AM, Mathieu Baudier wrote:

n order to have the IPs available on some guests, I'm wondering whether I should: 1 - add additional virtual interfaces or 2 - set up IP aliases (eth0:1, etc.) in the guests

I imagine that (1) would be faster and more efficient (but that's a guts feeling), and it feels cleaner. But with (2), I just need to restart the network in order to add new IPs (there won't be that many: like around 10 in the next few months), insteead of restarting the whole guest.

You don't have to restart the guest to add or remove aliases:

ifup eth0:1

ifdown eth0:1

work fine for starting and stopping them.