[ovs-discuss] Error setting forward delay on STP

[h bagade]

Thanks Justin for your complete reply:) I didn't know that there is a
relation between forward delay and max-age, your explanation helps me a lot.


On Mon, Jun 18, 2012 at 12:05 AM, Justin Pettit <jpettit at nicira.com> wrote:

> I took a quick look at the code, and nothing obviously stood out as wrong.
>  Our STP library (which is taken almost verbatim out of the 802.1D spec)
> has the following comment:
>
> /* Sets the desired forward delay for 'stp' to 'ms', in milliseconds.  The
>  * actual forward delay is clamped to the range of 4 to 30 seconds and
> subject
>  * to the relationship (2 * (bridge_forward_delay - 1 s) >=
> bridge_max_age).
>  * The bridge forward delay is only used when 'stp' is the root bridge. */
>
> By default, the max age is 20 seconds, which makes sense that the forward
> delay can't be below 11.  If you lower the max age
> (other_config:stp-max-age), can you lower the forward delay?  Clearly, this
> information should make it outside the code.  :-)  I'll fix that up so it's
> in ovs-vswitchd.conf.db.
>
> --Justin
>
>
> On Jun 17, 2012, at 6:02 AM, h bagade wrote:
>
> > Hi all,
> >
> > I'm using openvswitch 1.4.1. when I enable stp on bridge and set the
> forward delay lower than 11, in bridge status it is set correctly but the
> forward delay on sending packets are not correct and is shown to be 11
> instead of what I set! for example, I set the fw time to 9, it is shown 9
> on bridge status but 11 on STP packets!
> > Shouldn't the forward delay on packets be set to the value shown on
> bridge status?
> >
> > Thanks in advance
> > _______________________________________________
> > discuss mailing list
> > discuss at openvswitch.org
> > http://openvswitch.org/mailman/listinfo/discuss
>
>
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