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From Kirk Kosinski <>
Subject Re: Xenserver Shared Public Network
Date Fri, 02 Nov 2012 05:23:57 GMT
Hi, Trevor.  Unfortunately, removal of the CSP or other supplemental
packs is not possible, so you would have to reinstall XenServer.  I'm
not sure how to confirm that the CSP is causing a problem.  I guess you
can check for and disable any iptables or ebtables rules on the host
that appear to be blocking VM traffic.

The docs might not explicitly state when not to install the CSP, but
they do explain when it should be installed (to enable SG, ELB, and
EIP).  I filed a bug a while ago to request that CloudStack handle hosts
with the CSP that don't need it.  I filed it because it will probably be
required when XS 6.1 support is added (the CSP is included with XS 6.1).

Regarding the configuration, it sounds like you do need an advanced
zone, and if the application cannot work with NAT, shared networks are
the way to go.

It's possible there is another issue, but I am not clear on the
symptoms.  Hosts not pinging VMs and VMs not pinging system VMs aren't
necessarily problems.  The VMs can get DHCP from the virtual router, so
they can contact the virtual router, which is good.  If instances cannot
access your (physical) router, there may be a problem outside of
CloudStack.  Check if traffic from instances leaving the host are going
to the correct VLAN (the one with your router).  If it is, there may be
an issue with the router configuration.

Best regards,

On 11/01/2012 08:59 PM, Trevor Francis wrote:
> Hmm, that isn't represented in the docs (3.02 or 4.0)… Not quite sure how to remove
> Yes, I am running an advanced network because I have 3 physical bonds on my hosts and
it is my intent to direct assign a public ip address and a private ip address to my VMs.
> Is there a better way to skin a cat? I can't do NAT because of the nature of the application
deployed over the cloud instances.
> On Nov 1, 2012, at 10:55 PM, Kirk Kosinski <> wrote:
>> Hi, Trevor.  Are you using a basic zone with Security Groups?  It sounds
>> like you aren't since you mentioned creating multiple shared networks.
>> You should not install the CSP on XS hosts in an advanced zone or a
>> basic zone without SGs.  Doing so can result in network connectivity
>> issues for VMs.
>> Best regards,
>> Kirk
>> On 11/01/2012 08:42 PM, Trevor Francis wrote:
>>> yeap.
>>> On Nov 1, 2012, at 10:38 PM, "Kristoffer Sheather - Cloud Central" <>
>>>> Have you installed the XenServer Cloud Support Pack (CSP)?
>>>> ----------------------------------------
>>>> From: "Trevor Francis" <>
>>>> Sent: Friday, November 02, 2012 2:24 PM
>>>> To: "" 
>>>> <>
>>>> Subject: Xenserver Shared Public Network
>>>> So, I abandoned KVM due to Bonding floods that the community was unable to

>>>> resolve. I have no idea why it was happening.
>>>> Anyway. I am now on XS 6.02 and trying to deploy my network. I have created

>>>> a shared public network and a shared private network. I have both VLANS in

>>>> my switches (10 = public, and 11 = private). There is a VR for the shared

>>>> public network, just being used to hand out dhcp. The guest VMs can get out

>>>> on the isolated private network, but are unable to get out on the shared

>>>> public network. Both networks are able to pull dhcp from their respective

>>>> virtual routers.
>>>> The VMs cannot ping any system VMs (even though they reside on the same 
>>>> physical host) and the host cannot ping the vms. 
>>>> Any thoughts?
>>>> TGF

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