Re: STP access port start-up delay or intialization to

This is My Output
Show Run | i span
spanning-tree mode pvst
spanning-tree extend system-id
spanning-tree vlan 1 forward-time 6

Switch#show run int f1/0/12
Building configuration...

Current configuration : 36 bytes
!
interface FastEthernet1/0/12
end

Switch#debug spanning-tree events
Spanning Tree event debugging is on
Switch#

00:04:18: setting bridge id (which=3) prio 32769 prio cfg 32768 sysid 1 (on)
id
8001.000f.f7be.7400
00:04:18: set portid: VLAN0001 Fa1/0/12: new port id 800E
00:04:18: STP: VLAN0001 Fa1/0/12 -> listening
00:04:20: %LINK-3-UPDOWN: Interface FastEthernet1/0/12, changed state to up
00:04:21: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet1/0/12, ch
anged state to up
00:04:24: STP: VLAN0001 Fa1/0/12 -> learning
00:04:30: STP: VLAN0001 Fa1/0/12 -> forwarding

So From Blocking to Listening - 0 Time
Listening to Learning - 6
Learning to Forward - 6

VLAN0001
  Spanning tree enabled protocol ieee
  Root ID Priority 32769
             Address 000f.f7be.7400
             This bridge is the root
             Hello Time 2 sec Max Age 20 sec Forward Delay 6 sec

  Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
             Address 000f.f7be.7400
             Hello Time 2 sec Max Age 20 sec Forward Delay 6 sec
             Aging Time 300

Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- --------
--------------------------------

Fa1/0/12 Desg FWD 19 128.14 P2p

On Sat, May 9, 2009 at 11:13 PM, Ryan West <rwest_at_zyedge.com> wrote:

> Mike,
>
> This is the autoverify output:
>
> ! "show spanning-tree root" on SW1 should look like (Root ID will differ):
>
> Root Hello Max Fwd
> Vlan Root ID Cost Time Age Dly Root Port
> VLAN0001 1 0013.806d.d180 0 2 20 16
> VLAN0100 100 0013.806d.d180 0 2 20 16
> VLAN0145 145 0013.806d.d180 0 2 20 16
>
> (My output is below, thought I would mention this since it's not obvious
> via
> email)
> show spanning-tree root
>
> Root Hello Max Fwd
> Vlan Root ID Cost Time Age Dly Root Port
> ---------------- -------------------- --------- ----- --- --- ------------
> VLAN0001 1 0016.4736.ef80 0 2 20 6
> VLAN0013 13 0016.4736.ef80 0 2 20 6
> VLAN0100 100 0016.4736.ef80 0 2 20 6
> VLAN0145 145 0016.4736.ef80 0 2 20 6
>
> You can't see from here, but I was marked incorrect for using a
> forward-time
> of 6. My sixes have a red line through them.
>
> -ryan
>
> From: Mike Leske [mailto:mike.leske_at_googlemail.com]
> Sent: Saturday, May 09, 2009 4:09 PM
> To: Ryan West
> Cc: Anbu; Cisco certification
> Subject: Re: STP access port start-up delay or intialization to forwarding
> delay
>
> Hi Ryan,
>
> why not going with:
>
> spanning-tree vlan x forward-time 6
> 20 + 6 + 6 = 32
>
> Mike
>
> 2009/5/9 Ryan West <rwest_at_zyedge.com<mailto:rwest_at_zyedge.com>>
> Anbu,
>
> Thanks for the replay, I understand those phases on paper. What I'm trying
> to
> figure out when this actually happens and what type of wording in a
> question
> might key me to take into account. For example, the ASET lab asks this:
>
> Configure switch 1 as the STP root and set the following parameters:
>
> * Root priority of zero (0)
>
> * An access port start-up delay, due to Spanning Tree, of 32
> seconds.
>
> Which in this case means set the forward-time to 16 seconds and priority of
> associated VLANs to 0. What I'm trying to figure out is when I need to
> account for blocking as well.
>
> -ryan
>
> From: Anbu [mailto:ksanpu_at_gmail.com<mailto:ksanpu_at_gmail.com>]
> Sent: Saturday, May 09, 2009 3:29 PM
> To: Ryan West
> Cc: Cisco certification
> Subject: Re: STP access port start-up delay or intialization to forwarding
> delay
>
> From blocking to listening - 20 Sec
> Listening to Learning - 15 sec
> Learning to Forwarding - 15 sec
>
> So total 50 sec.
> On Sat, May 9, 2009 at 7:33 PM, Ryan West
> <rwest_at_zyedge.com<mailto:rwest_at_zyedge.com><mailto:rwest_at_zyedge.com<mailto:
> rwe
> st_at_zyedge.com>>> wrote:
> Hello,
>
> I was going through some of the ASET exams and I was wondering if someone
> might have some insight on key word detection for an STP question. What
> wording would key you into accounting for blocking time when taking a port
> from <state described in question> to forwarding?
>
> Thanks,
>
> -ryan
>
>
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Received on Sat May 09 2009 - 23:32:05 ART