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From Geoff Higginbottom <>
Subject Re: Management addresses on XenServers
Date Thu, 03 Oct 2013 21:11:43 GMT

Link local is so that the management server can talk to them, and the private (management)
address is so they can talk to the management server.

The Virtual Router has no private address so the standard way that CloudStack management servers
talk to all system VMs is via link local.

SSVM and CPVM have a private address and they use this when thy initiate comms to the management
server, using the address specified in the 'host' global setting' which should be a load balanced
ip if you have more than one management server.

The exception to this is if using VMware which does not have a link local network, in which
case the equivalent VIF on the vm is allocated a private ip range, but of course basic networking
does not work with VMWare so we can ignore that for now.


Geoff Higginbottom
CTO / Cloud Architect

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On 3 Oct 2013, at 22:02, "David Comerford" <<>>


Why do system VM's on XenServer in a Basic networking zone require a
link-local address AND a private IP from the management range?

Best regards,
David Comerford
Tel: +353 87 1238295
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