RE: Mind Games - MST

You will create two instances 1 and 2
The other will be in the default instance 0

> Date: Tue, 16 Oct 2012 10:59:47 -0500
> Subject: Mind Games - MST
> From: marco207p_at_gmail.com
> To: ccielab_at_groupstudy.com
>
> All,
>
>
> I really hate questions like this, hence the reason I have problems with
> the CCIE lab.
> Help me understand this supposedly easy question.
>
> s1 =====19/20===== s2
> || ||
> || ||
> 21/22 21/22
> || ||
> || ||
> s3=====19/20======s4
>
>
> *Task 7.1*
>
> Due to large number of VLANS that exist within the current network, the
> decision has been taken to migrate from 802.1 W spanning tree to 802.1S
> across all switches. Configure 802.1S spanning tree configuration with *3
> instances* as follows:
>
> Region Name: CCIE
> Revision: 10
> *Instance 3* -- All other VLANs
> Instance 1 -- VLAN 10 and 12
> Instance 2 -- VLAN 11 and 13
>
> My Question ???? :
> Do you create;
> instance 1
> instance 2
> instance 3
>
>
> *Task 7.2*
> With 3560-1 as the core connected switch using 802.1S spanning-tree,
> perform *traffic balancing* so that all traffic for VLANs contained in
> Instance 1 is sent out of ports fa0/19 and fa0/20, Instance 2 is sent out
> of portFa0/21 and Fa0/22, and *Instance 0 must not be load balanced*.
>
> Use the port-priority command on 3560-1 to alter the path that traffic
> takes on switches 3560-2, 3560-3, and 3560-4 using interface cost.
> Ensure 3560-1 is the root switch for all instances.
>
> My Question ???? :
> Based on Task 7.1, the first part of this task 7.2 would lead you into
> only creating instance 2, & instance 1 and leaving instance 0 as the
> All-other-VLANs? I would understand that if the put that CIST must be
> compatible, this would require me to use instance 0 for all the other
> VLANs, but this is not stated in the question so I'm again overreading, not
> reading enough or something.
>
> The second part of this task is confusing: What does this want you to do.
> "apply port-priority only on Sw1, and using Cost on SW2-SW3-SW4"
>
>
>
>
> Sorry, but I really hate the type of language or lack thereof Cisco uses on
> the CCIE LAB.
>
> Thanks,
> JS
>
>
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Received on Tue Oct 16 2012 - 19:25:33 ART