*Could you please explain,. how long RSTP waits in learning stage ? and when timers come into play ? * On Thu, Nov 18, 2010 at 9:08 PM, Jay Taylor <[email protected]> wrote:
> It's done through Proposal and Agreement messages - > http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_52_se/configuration/guide/swmstp.html#wp1073033 > > > > > On Thu, Nov 18, 2010 at 10:24 AM, Taqdir Singh <[email protected]>wrote: > >> *Hello Jay* >> ** >> *Could you please explain a little bit more on negotiations in RSTP ?* >> >> ** >> *if it is negotiation based, why there are timers ? when they are used ?* >> >> >> On Thu, Nov 18, 2010 at 8:49 PM, Jay Taylor <[email protected]> wrote: >> >>> There is no forward delay timer in RSTP. Convergence is based on >>> negotiation rather than waiting for timers to expire. >>> >>> >>> >>> On Thu, Nov 18, 2010 at 10:15 AM, Ryan Jensen <[email protected]> wrote: >>> >>>> I'm pretty sure the forward-delay timer is still 15 seconds. >>>> >>>> On Thu, Nov 18, 2010 at 10:03 AM, Taqdir Singh < >>>> [email protected]> wrote: >>>> >>>>> *Hi all,* >>>>> * >>>>> *What is the default convergence times when using RSTP? Unlike STP I >>>>> understand that RSTP has three timing intervals before it begins to >>>>> converge. >>>>> >>>>> RSTP >>>>> Hello timer >>> 2 seconds >>>>> MAX-AGE >>> 6 seconds >>>>> Forward-Delay (Learning) >>> ? seconds >>>>> >>>>> Default convergence time ? >>>>> >>>>> >>>>> STP >>>>> Hello timer >>> 2 seconds >>>>> MAX-AGE >>> 20 seconds >>>>> Forward-Delay (Listening) >>> 15 seconds >>>>> Forward-Delay (Learning) >>> 15 seconds >>>>> >>>>> Default convergence time 50 seconds >>>>> >>>>> >>>>> If I am understanding things correctly >>>>> >>>>> 1.The Hello interval are the same as STP which is every 2 seconds. >>>>> >>>>> 2. The default Max-Age time for RSTP is 3 times the hello interval or 6 >>>>> seconds. >>>>> >>>>> 3.RSTP elminates the listening state however, there is a learning >>>>> state. >>>>> >>>>> What is the default time that RSTP stays in the learning state before >>>>> is transitions to either forwarding or discarding? >>>>> >>>>> >>>>> _______________________________________________ >>>>> For more information regarding industry leading CCIE Lab training, >>>>> please visit www.ipexpert.com >>>>> >>>>> >>>> >>>> _______________________________________________ >>>> For more information regarding industry leading CCIE Lab training, >>>> please visit www.ipexpert.com >>>> >>>> >>> >> >> >> -- >> Thanks & regards, >> >> Taqdir Singh >> Networks | 9911709496 >> >> > -- Thanks & regards, Taqdir Singh Networks | 9911709496
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