From: bilal khan (bilalk.1@gmail.com)
Date: Sat Jan 12 2008 - 12:03:23 ARST
Hi Scott,
In case we use forward-time for that port. The scope for this is vlan based
. but it has no effect untill it is configured on the root bridge of the
vlan.
am i right?
Thanks
Bilal
On Jan 11, 2008 9:41 AM, Frank CCIE <frankccie@gmail.com> wrote:
> Hi,
>
> I did the test on Cat 3560. No port-fast is configured in port-level
> or global level for access-port.
>
> After plugging a cable into new configured access port, the port
> immediately -> "Listening", without staying "Block" for 20 second.
>
> It takes 30 second (listening time + learning time) to forward state.
>
> Is it new in 3560? Did anybody test it in 3550?
>
> (I tested on trunk port. After plug a cable to trunk port, the port ->
> listening state immediately too).
>
> Thanks
>
> Frank
>
>
> ======================
> CAT2(config-if)#do sh run int f0/11
> Building configuration...
> !
> interface FastEthernet0/11
> switchport access vlan 100
> end
>
> CAT2# debug spann event
>
> CAT2#
> 02:13:36: set portid: VLAN0100 Fa0/11: new port id 800D
> 02:13:36: STP: VLAN0100 Fa0/11 -> listening
> CAT2#
> 02:13:38: %LINK-3-UPDOWN: Interface FastEthernet0/11, changed state to up
> 02:13:39: %LINEPROTO-5-UPDOWN: Line protocol on Interface
> FastEthernet0/11, changed state to up
> CAT2#
> 02:13:51: STP: VLAN0100 Fa0/11 -> learning
> CAT2#
> 02:14:06: STP: VLAN0100 Fa0/11 -> forwarding
> CAT2#
>
>
>
>
>
> On Jan 9, 2008 11:46 PM, Scott Morris <smorris@ipexpert.com> wrote:
> > 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!
> >
> > 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
> > 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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