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

I agree 100%, in fact if you turn on debugs to the msec, youbll find that itbs 12.000 seconds. Ibm just trying to avoid being wordsmithed for 3 points during the exam and knowing when I should account for blocking and not.

Labbing it up for the win though!

-ryan

From: WW)W WWWW W [mailto:eshedalonie_at_gmail.com]
Sent: Saturday, May 09, 2009 4:38 PM
To: Ryan West
Cc: Mike Leske; Anbu; Cisco certification
Subject: Re: STP access port start-up delay or intialization to forwarding delay

! Exactly 12 Seconds !
I've Checkd that out With Ping from the computer to the switch.
On Sat, May 9, 2009 at 11:32 PM, WW)W WWWW W <eshedalonie_at_gmail.com<mailto:eshedalonie_at_gmail.com>> wrote:
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<mailto: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<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><mailto: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><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:rwest_at_zyedge.com>><mailto:rwest_at_zyedge.com<mailto:rwest_at_zyedge.com><mailto:rwe<mailto:rwe>
st_at_zyedge.com<mailto: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 - 16:42:11 ART