[CentOS-virt] IP aliases from a QEMU/KVM guest
mbaudier at argeo.org
Fri Aug 13 09:19:50 EDT 2010
I'm trying to set up IP aliases within a QEMU/KVM guest on CentOS 5.5
x86_64, going through a bridged virtualized interface.
The virtualized interface in the guest is configured as follow:
IP.OF.HOST.GATEWAY dev eth1
default via IP.OF.HOST.GATEWAY dev eth1
This is the configuration recommended by the provider (OVH) after a
virtual MAC address has been allocated for IP.OF.GUEST.ETH1:
It works fine for virtual interfaces added via libvirt/QEMU.
But when I try to configure an IP alias on another IP address aliasing
a virtualized interface, as per the instructions from
http://help.ovh.co.uk/IpAlias (and after assigning it a virtual mac
just like for eth1) :
I get the following error when restarting the network:
SIOCADDRT: Network is unreachable
and IP.OF.GUEST.ETH1:1 is:
- pingable from the same guest
- not pingable from other guests by the same provider
- not pingable from outside
or commenting out
(the IP block was a /30, but I don't think that has something to do here)
did not change the behavior.
I'll be interested to hear from experiences with setting IP alias from
within a guest.
Maybe my problem is due to the configuration of the provider network
and it is actually impossible to use IP aliases on virtualized
Any opinion/idea welcome!
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