From: Darby Weaver (ccie.weaver@gmail.com)
Date: Sun Dec 14 2008 - 20:43:55 ARST
I think you did get an answer.
1,3,5,7,9 etc are ODD numbers
2,4,6,8,10 etc are EVEN numbers.
1...
Well it's in the ODD number group.
You can always ask the proctor or whoever's labs you are doing...
However, I think they might say "Go back and read the question, it's in
there."
BTW - Based on your question you are configuring port-priority. Since you
are configuring port-priority once might ask what you are trying to achieve
based on your configuration. I mean at present you are configuring each set
of vlans to have a port-priority of 16.
Why are you doing this, specifically? Think for a moment.
And to take the discussion a step further based on the second part of your
question:
1. What does the 2nd option accomplish? Specifically.
2. What does the 1st option accomplish? Specifically.
3. Now to that we have two variables. Let's do some basic math and use the
order of operations to help decide which option to use to achieve the
desired effect on the root bridge election and then to affect the root port
selection process.
If you read my queries that are relative to you questions, answer them
yourself, then you'll not only have desired solution, but you'll also have
attained the knowledge to help you find the answer to this type of query not
only in any given lab, but also in the real world on the job when you are
try to figure out how/why Spanning-Tree is behaving "oddly". Since it might
not really be that odd if it was designed to do it that way and it really
would not be that odd for 1+ CCIE Candidates or even full CCIE's to have a
less than perfectly complete understanding of how Spanning-Tree really
works. However, all CCIE RS Candidates and by necessity all CCIE RS's have
actually passed a CCIE RS Written exam... which is heavily taxed on the area
of the Spanning-Tree Protocol and "ALL" of its confguration options.
On Sun, Dec 14, 2008 at 4:46 PM, nouman abbasi <abbasi.nouman@gmail.com>wrote:
> Hi,
>
> I had posted this before but no reply, some said check archive but didnt
> get
> any there..
> Hope to get reply
>
>
> *SCENARIO:- *(Load Balancing)
>
> configure odd vlans on one port of trunk and even vlan on another port of
> trunk
> vlan on switch are vlan 1,vlan 2,vlan 3, vlan 4, vlan 5
> interface fa 0/15
> description odd vlan
> spanning-tree vlan 3,5 port-priority 16
>
> interface fa 0/16
> description even vlans
> spanning-tree vlan 2,4 port-priority 16
>
> my concern is
> <1> do I need to have vlan 1 under spanning-tree for interface fa 0/15
> <2> do I need to have the statement "spanning-tree vlan 2-5 root primary
>
>
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>
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