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 > >
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