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From Geoff Higginbottom <>
Subject RE: Help with advanced zone kvm networking setup.
Date Mon, 21 Jan 2013 09:43:05 GMT
Hi Nate,

The main problem I see with your design is with relation to the Storage Network using a VLAN.

There is a lot of confusion within CloudStack relating to the 'Storage Network' as it relates
to Secondary and NOT Primary Storage.

If you choose to use the Storage Network, it is only worthwhile doing so if you have NIC(s)
you can dedicate to it, once configured it is used by the SSVM to transfer Snapshots, Templates
etc to and from Secondary Storage.  If you place it on a unique VLAN and IP Range, the SSVM
AND the CloudStack management Server must be able to communicate with it.

With regard to VLANs, just make sure the switch ports are configured for the VLAN IDs you
want to use, CloucStack will configure the VLANs on the Hypervisors for you

I suggest you take a look at the following

Paul Angus' Blog on understanding the physical network

You may also find My blog on CloudStack Networking usefull, a little old now but still pertinent

There is also a recording of the 'Introduction to Networking' talk I gave at the CloudStack
Collaboration Conference in Las Vegas recently


Geoff Higginbottom

D: +44 20 3603 0542 | S: +44 20 3603 0540 | M: +447968161581

-----Original Message-----
From: Matt Hohman []
Sent: 21 January 2013 03:45
Cc: Nate Vick
Subject: Help with advanced zone kvm networking setup.

Hey All,

I'm looking for some advice on setting up our advanced zone for our small private cloud. Here
is a rundown of how we are trying to get this going.

5 KVM Ubuntu 12.03 Hypervisors with 2 nics each

on eth0

management network is untagged vlan 3001 tagged storage

on eth1
vlan 101 tagged Public
vlan 3100 - 3199 tagged Guest

KVM Hots are on: mngt storage mngt storage mngt storage mngt storage mngt storage

Cloudstack 4.0 is installed on Ubuntu 12.04 on ip NFS is

Does this network scheme work well for cloudstack? Is there something that should be changed?

I'm a little confused on how to set this setup properly in /etc/network/interfaces. Do I need
to manually define all 100 guest vlans? How do I setup the guest bridge?

When I'm adding the zone to cloudstack what should my network labels be and do I assign these
in the /etc/network/interfaces file?

Here is my attempt at /etc/network/interfaces for host1

### /etc/network/interfaces
auto lo
iface lo inet loopback

# Hypervisor Management
auto eth0
iface eth0 inet static

#cloud-store storage network
auto eth0.3001
iface eth0.3001 inet static

# Public network
auto cloudbr0
iface cloudbr0 inet manual
    bridge_ports eth1.101
    bridge_fd 5
    bridge_stp off
    bridge_maxwait 1
### EOF

Any help would be greatly appreciated!

Matt Hohman
Technical Ministries
New Heights Church
ShapeBlue provides a range of strategic and technical consulting and implementation services
to help IT Service Providers and Enterprises to build a true IaaS compute cloud. ShapeBlue’s
expertise, combined with CloudStack technology, allows IT Service Providers and Enterprises
to deliver true, utility based, IaaS to the customer or end-user.


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