Thanks alot joe you have provided the enough information :)
with option one if its the indirect failure then it will take 20 seconds
(default max-age ) + 16 seconds forward delay so total of 36 seconds
Even If I use with MST instead of PVSTP I hope the result will remain the
same.. am I right ?
SW1
spanning-tree MST forward-time 8
Date: Wed, 22 Jul 2009 21:17:01 -0400
Subject: Re: [OSL | CCIE_RS] Spanning-tree timer
From: [email protected]
To: [email protected]
CC: [email protected]
Option #1 assuming the question means it will wait 16 seconds AFTER max_age has
already expired. After max_age expires it is 2x forward-delay.
Option #2 assuming the question means it will wait 16 seconds in total.
I suppose it depends on how you interpret "...when a port fails". My best
guess is option #1, but in the real lab if I got this,I would ask the proctor
and give him the information you just gave me so he knows that you know what
you are talking about.
Also:
Max-Age is still 20 seconds even with RSTP/MST (verify this by doing show span
in either of those modes). There is a subtle difference. RSTP/MST can detect
a failure in 6 seconds (3x hello-time of 2 seconds) but that is a different
function than the max age. The hello BPDUs in RSTP/MST work differently than
in traditional STP and PVSTP+ because in RSTP/MST the hellos are used between
routers on each segment as sort of a "keepalive."
On Wed, Jul 22, 2009 at 9:08 PM, M Jay <[email protected]> wrote:
Hi
I need help in this question:
SW1 connected with SW2 through trunk ports, when a port fails the other port
will wait for 16 second before the interface begins forwarding.
Possible soltuions:
SW1
spanning-tree VLANx forward-time 8
Or
Spannin-tree VLANx forward-time 5
spanning-tree VLANx max-age 6
As forward-time includes listening and learning phases (5+5= 10) do I need to
include the max-age time of 6 seconds ? Does max-age time effects in forwarding
state of interface ??
Please assist!!!!
Thanks
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