[ovs-discuss] Error setting forward delay on STP
bagadeh at gmail.com
Tue Jun 19 03:45:30 UTC 2012
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
> * to the relationship (2 * (bridge_forward_delay - 1 s) >=
> * 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.
> 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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