Hi,
The cause of this problem seems that the difference of OFPT_PORT_STATUS message
behavior between Open vSwitch(OVS) and Lagopus.
Then, does the following patch fix this problem?
$ git diff
diff --git a/ryu/lib/stplib.py b/ryu/lib/stplib.py
index de3cced..beb68e1 100644
--- a/ryu/lib/stplib.py
+++ b/ryu/lib/stplib.py
@@ -297,6 +297,11 @@ class Stp(app_manager.RyuApp):
bridge.port_delete(port.port_no)
else:
assert reason is dp.ofproto.OFPPR_MODIFY
+ if bridge.dp.ports[port.port_no].state == port.state:
+ # Do nothing
+ self.logger.debug('[port=%d] Link status not changed.',
+ port.port_no, extra=dpid_str)
+ return
if link_down_flg:
self.logger.info('[port=%d] Link down.',
port.port_no, extra=dpid_str)
To Ryu team, the problem details are below:
simple_switch_stp_13.py supposed OVS on Mininet and was implemented for
Ryu-Book example.
http://osrg.github.io/ryu-book/en/html/spanning_tree.html
In case of OVS, OFPT_PORT_STATUS messages will be NOT sent when the port config
has changed
and only sent when the port state has changed.
OTOH, in case of Lagopus, OFPT_PORT_STATUS messages will be sent when both port
state and
config have changed.
Therefore, simple_switch_stp_13.py will overproduce the topology recalculation
events.
According to OpenFlow Spec 1.3.5, OFPT_PORT_STATUS messages with the reason
value
OFPPR_MODIFY should be sent the BOTH port state and config have changed.
So, the behavior of Lagopus is correct and we should fix stplib.py as the
above, I think.
Thanks,
Iwase
On 2016年07月11日 15:46, Hong Panha wrote:
> Hi everyone !
>
>
> I am doing experiment with lagopus and ryu now on my two mini-server which
> both of them running ubuntu 14.04LTS, Lagopus 0.2.6 , Ryu 3.25 and intel dpdk
> 2.2.0. when i try to run simple_switch_stp_13.py with ryu-manager, it’s not
> function well. Please refer to the attachment file which consist of Lagopus
> setting and log from ryu- manager.
>
> I am looking forward to hearing back from you.
>
> Best Regards,
> Hong Panha
>
> =
>
>
>
>
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