[ovs-discuss] DPID changed when deleting a port

[Jesse Gross]

On Tue, Oct 30, 2012 at 8:50 AM, Jeff Welsch <jeff at jeffwelsch.com> wrote:
> Hello,
>
> I was prepared to write this email with examples of how to reproduce the
> issue, yet when I tried to do so I was unable.  However,  I do have the
> output of the original case that triggered the process in my terminal
> session so will report it regardless.  However, perhaps this should just be
> a heads-up at this point.
>
> When deleting a port using ovs-vsctl del-port the DPID for my OVS 1.8.90
> changed.  Can that be confirmed as incorrect behavior?  When adding the same
> port back to the switch with ovs-vsctl add-port the DPID changed back to the
> original.

The DPID is based on the bridge MAC address, which is from the lowest
numbered device attached to the bridge.  If you remove this device,
the DPID will change.  You can avoid this behavior by manually setting
a specific DPID in the database.