From: Jack Flash (jack.flash@inbox.com)
Date: Thu Jan 10 2008 - 22:05:24 ARST
Scott,
You wrote.. > If you have an access-port with no BPDU's (e.g. portfast)
My understanding of portfast was that bpdu's still get transmitted, as per
below? Have I got this wrong?
Only one interface is up...
Switch#sh ip int b | inc up
FastEthernet0/13 unassigned YES unset up up
Portfast is enabled
Switch#sh run int fa0/13
Building configuration...
Current configuration : 93 bytes
!
interface FastEthernet0/13
switchport mode dynamic desirable
spanning-tree portfast
end
yet I still see BPDU's getting sent....
Switch#sh spanning-tree vlan 1 detail | inc sent
BPDU: sent 7, received 0
Switch#sh spanning-tree vlan 1 detail | inc sent
BPDU: sent 8, received 0
Switch#sh spanning-tree vlan 1 detail | inc sent
BPDU: sent 10, received 0
Switch#
Regards,
Jack
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Scott Morris
Sent: 10 January 2008 04:47
To: wim.depauw@getronics.com; ccielab@groupstudy.com
Subject: RE: Tuning STP timers : IPexpert versus IE
If you have an access-port with no BPDU's (e.g. portfast) then you are
correct that it's just listening + learning. if you aren't doing portfast
and it's the first time the port is coming online, it will be blocking (20
sec) + listening + learning. Maxage has nothing to do with this part
(although it too equals 20 seconds, so I can understand the confusion)
Perspective. It's all about perspective.
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE-M
#153, JNCIS-ER, 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!
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
wim.depauw@getronics.com
Sent: Wednesday, January 09, 2008 2:09 PM
To: ccielab@groupstudy.com
Subject: Tuning STP timers : IPexpert versus IE
Hi,
When you get the following question :
- Configre your switch so that the hosts come online in 34 sec
I would configure it with the following command
- spanning-tree vlan X forward-time 17 sec
I did a test with this command and it seems to work , but in the ipexpert v9
lab 40 they configure it like this :
spanning-tree vlan X forward-time 7 sec , I presume they use also the
max-age timer so then the sum will be 34 sec .
BUT
for a normal access-port with portfast configured you will not send any BPDU
so you shouldn't count the max-age timer.
I saw an example in the IE workbook and they configure it on my way
I was wondering if the guru's don't come the same solution how would the
would-like-to-be CCIE's find the correct solution :-))
Any opinions ??
PS : A second question , do I need to calculate in this time also the hello
time or is this not necessary ?
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