From: Scott Morris (smorris@ipexpert.com)
Date: Tue Oct 16 2007 - 14:15:46 ART
Max age is how long you wait after receiving the last BPDU before
recalculating things (like a dead timer).
When a port comes up, you block for 20 seconds initially. (first plug in)
That 20 seconds is not a changeable timer. Then you listen/learn for 15
seconds each. That's the "normal" 50 seconds.
If you want the whole thing to take 34 seconds, subtract 20 first. Since
you can't change that. So now we have 14 seconds for listening and
learning. These timers must be the same per spec, so divide by two (7) and
that's your forward-timer.
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE-M
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-ER
VP - Technical Training - IPexpert, Inc.
IPexpert Sr. Technical Instructor
A Cisco Learning Partner - We Accept Learning Credits!
smorris@ipexpert.com
Telephone: +1.810.326.1444
Fax: +1.810.454.0130
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
hadek.el-ayachi@nsn.com
Sent: Tuesday, October 16, 2007 11:39 AM
To: ccielab@groupstudy.com
Subject: IE lab40
Hi experts,
In Lab40, the question said: access ports should take 34 seconds to come
online.
I was expecting the answer: spanning-tree forward-time 17. I checked this
answer using sh and no sh in one access port.
However the answer is spanning-tree forward 7???????????????? It takes into
consideration max-age:( Any comment please
This archive was generated by hypermail 2.1.4 : Fri Nov 16 2007 - 13:11:15 ART