Re: RAPID PVST question (forward-delay)

Yeah - in 802.1D - the root initiates the timers as it initiates the
BPDUs. But in my testing of RSTP at the command line - I needed to set
them on each switch as they would no longer propagate from the root. I
presume this is because all switches are initiating BPDUs now as a
"keepalive" type mechanism.

Warmest Regards,

Anthony J. Sequeira, CCIE #15626
http://www.INE.com

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More Info: http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a0080093f25.shtml

On Jul 27, 2009, at 3:15 AM, Binoy Udayabhanu wrote:

> Hi Anthony,
>
> I read in CCNP Text that timers need to be changed only on the root
> switch as it will be propagated in BPDU packets to all others. If I
> remember correct I thought it was in the STP chapter. I assumed the
> same for RSTP. So should we change the timers in all switches
> involved?
>
> Binoy
> CCIE# 24874
>
> --- On Sun, 26/7/09, Anthony Sequeira <asequeira_at_ine.com> wrote:
>
> From: Anthony Sequeira <asequeira_at_ine.com>
> Subject: Re: RAPID PVST question (forward-delay)
> To: "Joe Astorino" <jastorino_at_ipexpert.com>
> Cc: "Rameez Khan" <rameezk1999_at_gmail.com>, "CCIE Groupstudy" <ccielab_at_groupstudy.com
> >
> Date: Sunday, 26 July, 2009, 10:48 PM
>
> Yes - and it is a global configuration change for both (or all)
> switches involved.
>
> Warmest Regards,
>
> Anthony J. Sequeira, CCIE #15626
> http://www.INE.com
>
> Test your Core Knowledge today!
> Q: What type of IGMP message is not supported by IGMPv1 but is
> supported by IGMPv2?
> A: Leave Message
> More Info: http://technet.microsoft.com/en-us/library/cc957916.aspx
>
>
> On Jul 26, 2009, at 12:57 PM, Joe Astorino wrote:
>
> > You would change forward delay to 6 seconds in both cases.
> >
> >
> > ------Original Message------
> > From: Rameez Khan
> > Sender: nobody_at_groupstudy.com
> > To: CCIE Groupstudy
> > ReplyTo: Rameez Khan
> > Subject: RAPID PVST question (forward-delay)
> > Sent: Jul 26, 2009 6:18 AM
> >
> > i have to ask 1 thng, in RAPID-PVST ,if we want to change total
> > startup-delay incase when switch one port fails to let say 12
> seconds
> > so i wld do
> > spanning-tree vlan_A forward-delay 16
> > and incase of PVST+ , i do
> > spanning-tree vlan_A forward-delay 8
> >
> > am i right or am i mising sme thng ????
> > and it needs to configred on both ends or it is local to the
> switch ?
> >
> >
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> > Regards,
> >
> > Joe Astorino - CCIE #24347 R&S
> > Technical Instructor - IPexpert, Inc.
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Received on Mon Jul 27 2009 - 12:48:21 ART