Re: MST & PVST Forwarding Question

> I Think I am correct here , please fix me if not.
>
> *IN PVST*
>
> *From What I See in the configuration guide you can only configure by vlan
> the timers*
>
> *Default are :*
>
> **20 seconds for BPDU information to time out, 15 seconds in the listening
> state and another 15 seconds in the learning state.
> *so I Would make Listening + Learning to 8 Seconds - each of them to 4
> *spanning-tree vlan* *vlan-id *max-age 4
>
> And Max-Age to 6 - BPDU information to time out
> *spanning-tree vlan* *vlan-id* *forward-time* 8
>
> You will get 8 + 8 = 16
>
> *
> http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_50_se/configuration/guide/swstp.html
> *<http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_50_se/configuration/guide/swstp.html>
>
>
> *IN MSTP*
>
>
> *From What I See in the configuration guide you can only configure by MST
> Instance ***
>
> *spanning-tree mst* *forward-time* 4
>
> *spanning-tree mst max-age* 8
>
> so you will get 8 + 8 = 16
>
> *
> ----------------------------------------------------------------------------------------------------------------------------------
> *
>
> *Since you are using the Backup Interface command - so its not suppose to
> be in Spanning-tree block mode. **and then The Port Will have to go truh
> all the process of blocking , listening, learning, forwarding.*
>
>
> http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_50_se/configuration/guide/swmstp.html#wp1073033
>
> On 4/10/09, Bhuvanesh Rajput <ashu2084_at_gmail.com> wrote:
>>
>> paul,
>>
>> there should be vlan in this case....
>>
>> please specify the vlan #
>>
>> cheers!
>> Bhuvanesh
>>
>>
>>
>> On Fri, Apr 10, 2009 at 10:51 PM, Paul Adams <ccie.paul_at_gmail.com> wrote:
>> > Hello GS,
>> >
>> > Can I have input of this question
>> >
>> > (Question )
>> > Sw4 is connected to SW1 on ports Fa 0/20 && Fa 0/21. when the port
>> failed
>> > the other port will wait for 16 seconds before the interface begins
>> > forwarding
>> >
>> > *What is the correct solution if the mode is MST
>> > *
>> > *what is the correct solution if the mode is PVST*
>> >
>> >
>> > Blogs and organic groups at http://www.ccie.net
>> >
>> > _______________________________________________________________________
>> > Subscription information may be found at:
>> > http://www.groupstudy.com/list/CCIELab.html
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Sat Apr 18 2009 - 15:56:56 ART