Problem with OpenStack Getting Started Guide

Steven Dake sdake at
Tue Jan 3 18:29:40 UTC 2012

On 01/03/2012 05:32 AM, Mark McLoughlin wrote:
> On Fri, 2011-12-23 at 13:16 -0700, Steven Dake wrote:
>> Killing the first VM that was started (which has a MAC address equal to
>> the br0) will cause deletion of vnet0 and cause the bridge driver to
>> flush the arp table and choose a new bridge interface.  This results in
>> disconnection of the remaining VM for 30-60 seconds.  
> What exactly is happening during this time? The guest's routing table is
> configured with the host as its gateway and it has a stale ARP cache
> entry for the host?
> Cheers,
> Mark.

br0 adopts the mac address of the first interface added to it.  If the
first interface added to it is removed, br0 finds a new mac address from
the "next" interface in the bridge.  When the mac address is removed,
the arp table is flushed for 30-60 seconds.


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