Thank you, Iwase.
Yes, I used simple_switch_stp.py.
I see timeout_check_period and others in switches.py.
So, did you mean I should run like that ryu-manager simple_switch_stp.py
--observe-links?
I'm sorry, I'm a newbee in Ryu.

Thank you,
Tsogbayar.

On Fri, May 29, 2015 at 11:16 AM, Yusuke Iwase <[email protected]>
wrote:

> Hi,
>
> First, what Ryu application are you using? simple_switch_stp.py?
> If so, simple_switch_stp.py is one of the sample application of Ryu.
> In other words, Ryu does not require to use BPDU,
> just performing like STP switch by using simple_switch_stp.py.
>
> If you want to recover a link failure with Ryu,
> I recommend you to use ryu.topology modules with --observe-links option of
> ryu-manager.
>  https://github.com/osrg/ryu/tree/master/ryu/topology
>
> Thanks,
> Iwase
>
> On 2015年05月29日 10:55, Hm Balarama wrote:
> > Hello,
> >
> > I tested Ryu with loop topology. I used 3 switches and those are OF
> enabled.
> > I wanted how much time does Ryu recover a link failure when I remove
> cable.
> > So I changed DEFAULT_MAX_AGE in bpdu.py. Also I set DEFAULT_HELLO_TIME=1.
> > I tested 4 times.
> > DEFAULT_MAX_AGE =1 and average recovery time was 74 seconds
> > DEFAULT_MAX_AGE =2 and average recovery time was 72 seconds
> > DEFAULT_MAX_AGE =3 and average recovery time was 71 seconds
> > DEFAULT_MAX_AGE =5 and average recovery time was 74 seconds
> > It seems to me a little bit strange. I don't know why.
> > I expected DEFAULT_MAX_AGE=1 takes very short time than DEFAULT_MAX_AGE
> =2,3,5 but it doesn't.
> > Could you please tell me why it happened?
> >
> > Thank you,
> > Tsogbayar.
> >
> >
> >
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> >
> >
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