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From Edison Su <>
Subject RE: Cloudstack 4.0 networking
Date Thu, 27 Dec 2012 00:11:12 GMT
You can try basic network with a little hack:
1. install cloudstack mgt server and kvm agent as normal, add the kvm host into cloudstack,
without any extra configuration for network.
    By default, cloudstack will create a bridge, called cloudbr0,  on your kvm host. The bridge
is created on the gateway device(ip route|grep default|awk '{print $5}')
2. Then disable the zone, so no vm will be created.
3. manually create another bridge on the device which is not gateway device.
4. modify /etc/cloud/agent/, set {guest,private,public}.network.device properly.

For example, if cloudbr0 is created on eth0(which is your public network), and cloudbr1 is
created on eth1(which is your private network), set
5. restart cloud agent by "service cloud-agent restart"
6. enable the zone, everything should work as planned.

> -----Original Message-----
> From: linuxsupport []
> Sent: Wednesday, December 26, 2012 2:48 AM
> To:
> Subject: Cloudstack 4.0 networking
> Hi All,
> I am new to CloudStack, I have installed version 4 on CentOS 6.3
> Management node is a virtual machine, with 2 interfaces one for public and
> other for private network
> eth0 => public
> eth1 -> private
> Host machine in which management VM is running is a Xen host with 2
> physical interfaces, eth0 and eth1, both eth0 and eth1 have a respective
> bridge setup and this is working.
> I have another machine which is KVM host with cloud-agent (CentOS 6.3)
> KVM machine also have 2 physical interfaces eth0 and eth1, eth0 has a public
> IP and eth1 has private IP (
> Now, I want that all the communication for management, storage and guest
> to guest happen through eth1 and for internet use eth0
> Can someone guide me to configure networking correctly?
> If I use basic networking then it does not allow me to use eth1 and if I use
> advance networking then it asks for VLANs, I tried to configure VLANs
> interfaces on eth1 but it did not work, may be because I have no control on
> switches provider has their own VLAN for public and private which I am not
> aware about it.
> Please help me to find right way.
> Thanks
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