Hello,

Question — I am following the directions found here:  
http://docs.cloudstack.apache.org/projects/cloudstack-installation/en/latest/hypervisor_installation.html?highlight=network

I am wondering something about the interfaces, I do as it says; however, I am 
unable to obtain connect to my box once setup. I have to revert eth0 (eth1) to 
regain network connectivity. Is there something I am missing? Is this setup, 
required to have a switch (hardware) if so, then I suspect I would need to 
setup OpenVSwitch, correct?

- daoenix

vi /etc/sysconfig/network-scripts/ifcfg-eth0
Make sure it looks similar to:

DEVICE=eth0
HWADDR=00:04:xx:xx:xx:xx
ONBOOT=yes
HOTPLUG=no
BOOTPROTO=none
TYPE=Ethernet
We now have to configure the three VLAN interfaces:

vi /etc/sysconfig/network-scripts/ifcfg-eth0.100
DEVICE=eth0.100
HWADDR=00:04:xx:xx:xx:xx
ONBOOT=yes
HOTPLUG=no
BOOTPROTO=none
TYPE=Ethernet
VLAN=yes
IPADDR=192.168.42.11
GATEWAY=192.168.42.1
NETMASK=255.255.255.0
vi /etc/sysconfig/network-scripts/ifcfg-eth0.200
DEVICE=eth0.200
HWADDR=00:04:xx:xx:xx:xx
ONBOOT=yes
HOTPLUG=no
BOOTPROTO=none
TYPE=Ethernet
VLAN=yes
BRIDGE=cloudbr0
vi /etc/sysconfig/network-scripts/ifcfg-eth0.300
DEVICE=eth0.300
HWADDR=00:04:xx:xx:xx:xx
ONBOOT=yes
HOTPLUG=no
BOOTPROTO=none
TYPE=Ethernet
VLAN=yes
BRIDGE=cloudbr1
Now we have the VLAN interfaces configured we can add the bridges on top of 
them.

vi /etc/sysconfig/network-scripts/ifcfg-cloudbr0
Now we just configure it is a plain bridge without an IP-Address

DEVICE=cloudbr0
TYPE=Bridge
ONBOOT=yes
BOOTPROTO=none
IPV6INIT=no
IPV6_AUTOCONF=no
DELAY=5
STP=yes
We do the same for cloudbr1

vi /etc/sysconfig/network-scripts/ifcfg-cloudbr1
DEVICE=cloudbr1
TYPE=Bridge
ONBOOT=yes
BOOTPROTO=none
IPV6INIT=no
IPV6_AUTOCONF=no
DELAY=5
STP=yes

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