From: Niche (jackyliu419@gmail.com)
Date: Tue Oct 25 2005 - 10:38:28 GMT-3
Hi guys,
May be I will wait for abit and see any input from others before I say
anything again.
As far as I know, 15+15+20 = 50, that's how "STP 50 seconds rule" come from,
just a thought =)
Cheers~
Jacky
On 10/25/05, simon hart <simon@harttel.com> wrote:
>
> Niche,
>
> I have never heard of reconfiguration stage?
>
> The max-age timer is for aging out macs in the cam prior to going to
> listening or learning. Now if the port is coming up from first
> initialisation the port will only go through the learning and listening
> mode
> Hence 8 +8 = 16
>
> If the port is reconverging then you have to wait for the cam to age out
> with the max-age timer and this will need to add the max-age, thus an
> addtional 6 seconds int the example given.
>
> So the point of my earlier mail was it depends upon what state the port is
> in to begin with
>
> Simon
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Niche
> Sent: 25 October 2005 13:14
> To: Javier Tomi
> Cc: ccielab@groupstudy.com
> Subject: Re: STP Question
>
>
> Hi guys,
>
> To Simon,
>
> According to software configuration guide of 3550
>
> Forward-delay timer - Determines how long each of the listening and
> learning
> states last before the interface begins forwarding.
> So if we set 7 or 8, then that will make the total delay time to 20 or 21
> seconds,
> listen stage - 7 seconds (forward-delay)
> learning stage - 7 seconds (forward-delay)
> reconfiguration stage - 6 seconds (max-age)
>
> To Javier,
>
> Honestly, I would like to clarify the original question as well cause I am
> still trying to figure out the accurate requirement of it. But snapshot
> routing can be used not only just dial-up link I think.
>
> Cheers~
> Jacky
>
> On 10/25/05, Javier Tomi <fjtm@tid.es> wrote:
> >
> > Hi Jacky,
> >
> > I am not sure to understand your question... Snapshot routing is used to
> > periodically trigger conections on dial up environments to make sure
> > that the routing table is accurate. I don't think that this is what you
> > are looking for.
> >
> > Could you try to clarify the requirements...
> >
> > Regards
> >
> > Javi
> >
> >
> > Niche wrote:
> >
> > >Sorry to make some modification to my previous post,
> > >
> > >1 router be (active router speaker) and 1 router be (listener &
> re-active
> > >route speaker)
> > >
> > >Cheers~
> > >Jacky
> > >
> > >On 10/25/05, Niche <jackyliu419@gmail.com> wrote:
> > >
> > >
> > >>1. So I guess the configuration is,
> > >>
> > >>spanning-tree vlan x forward-time 4
> > >>spanning-tree vlan x max-age 6
> > >>
> > >>2. Sorry in advance if it's due to my understanding to the original
> > >>question is wrong.
> > >>
> > >>ip rip triggered
> > >>
> > >>this command is actually make the router send update to it's neighbor
> > when
> > >>there is a change in network topology.
> > >>
> > >>I think that's not the original question ask for? Snapshot routing was
> > >>also the answer that pop up in my mind cause the question was asking
> > kinda
> > >>like 1 router be route speaker and 1 router be route listener.
> > >>
> > >>May be I am wrong?
> > >>
> > >>Cheers~
> > >>Jacky
> > >>
> > >>On 10/25/05, Javier Tomi <fjtm@tid.es> wrote:
> > >>
> > >>
> > >>>1. Tunning the STP timers. Remember to do it on the STP root and
> backup
> > >>>root of the VLAN
> > >>>2. Ip rip triggered at interface level
> > >>>
> > >>>HTH
> > >>>
> > >>>Javi
> > >>>
> > >>>Nadeem Zahid (iszahid) wrote:
> > >>>
> > >>>
> > >>>
> > >>>>1. Let say I want to move a switchport into FWD state under 16
> second
> > >>>>and yet it should
> > >>>>go through all STP states, what comes to your mind?
> > >>>>- Portfast? will only go through all states after a switch resets,
> > >>>>otherwise will skip 2 states
> > >>>>- Tune down the STP timers to minimum for that VLAN?
> > >>>>LIS=4+LRN=4+AGE=6
> > >>>>Which one sounds better fit to fulfill the requirement?
> > >>>>
> > >>>>2. R1--------------R2
> > >>>>- R1 should only send RIP update when it sees one, otherwise not.
> > >>>>What comes to your mind - Snapshot?
> > >>>>
> > >>>>thanks
> > >>>>
> > >>>>Nadeem
> > >>>>
> > >>>>NADEEM ZAHID
> > >>>>Cat6500 MPLS & FM DevTest
> > >>>>
> > >>>>250 West Tasman Drive
> > >>>>San Jose, CA-95134 USA
> > >>>>IP Phone: 1 (408) 526 5857
> > >>>>IP Fax: 1 (408) 527 1325
> > >>>>
> > >>>>"Life is short - use it...!"
> > >>>>
> >
> >
>
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