[ovs-dev] STP and Open vSwitch: hosts versus networks

[Jarno Rajahalme]

> On May 4, 2015, at 5:41 PM, Ben Pfaff <blp at nicira.com> wrote:
> 
> Recently we've had a number of reports on this mailing list that, when a
> new port appears on an Open vSwitch switch, STP triggers a topology
> change and start dropping packets for several seconds.  After thinking
> about this for a while, I think what's happening is that STP in OVS is
> treating every port as if it potentially connects to a switching
> element.  That's correct, but it makes connecting new ports slow.  It
> seems to me that we need to add a feature equivalent to Cisco's
> "portfast" (e.g. see
> http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4000/8-2glx/configuration/guide/stp_enha.html)
> if we want to support STP in a way that's really convenient for users.
> 
> Any thought?

Would this happen if the added port had stp-enable=false on it?

  Jarno