From: Cacca Mucca (caccamucca@gmail.com)
Date: Mon Dec 18 2006 - 04:42:27 ART
My last job, I worked at layer 2 network from hell. So, for me, CCIE lab
just got easier.
Finally, something went my way for once.
Good luck everyone for the year 2007.
On 12/17/06, loc.pham@comcast.net <loc.pham@comcast.net> wrote:
>
> George,
> That is exactly why Cisco want to test all candidate with STP on
> multiple switches !!!
> Read this link will show you :
> http://www.cisco.com/warp/public/473/21.html
>
> That is also why CCIE pay big $$$ ( hopefully still for along time )
> HTH,
> lP
>
>
> Re: Prediction - Lab Results CCIE
> ---------------Reply to sender to list
> # From: "CCIE" <ccie@madisonsolutions.net>
> # To: "Darby Weaver" <darbyweaver@yahoo.com>, "'Cisco certification'" <
> ccielab@groupstudy.com>
> # Subject: Re: Prediction - Lab Results
> # Date: Sun, 17 Dec 2006 09:02:39 -0500
> # References: <923158.70406.qm@web56814.mail.re3.yahoo.com>
> # Reply-to: "CCIE" <ccie@madisonsolutions.net>
>
>
> Good morning:
>
> I concur, change is disruptive for a short period. Playing with four
> switches in my own lab I have started to see things I did not expect and
> wanted to pass along.
>
> We all have read about VTP and when you add a new switch to a network you
> should set the VTP to transitive before bringing the switch on line. The
> other day as I added a switch into my lab to practice spanning-tree, and
> the
> VTP election of the additional switch deleated all of my VLAN's.
>
> Having never seen this in a real network I was taken back for a moment.
> All
> of the interfaces with assigned VLAN's went from happy blinking green to
> flatline orange. My network went from working to dead.. All of the VLAN's
> that I had built were still on the interfaces but not in the vlan
> database.
>
> I discoverd the issue after a moment and resolved the VTP election by
> having
> only one "vtp mode server" in the switch domain. I mention this as an
> example of what can go wrong on the new lab, or worse what is designed
> into
> the new lab. With both 3550's and 3560's it would be very easy for the
> network to go dark in the middle of your lab because of a VTP issue.
>
> For the Lab I think it is wise to not only look at configuration issues,
> but
> to remember the simple rules to stop spanning-tree loops, check what you
> are
> doing as you bring up interfaces, vtp issues, etc. The big clue that I
> expect to see on the Lab, is that the trunking interfaces between switches
> are shutdown.
>
> Any port that is dark that needs be turned up is going to be suppect, and
> should be analized before turning up. The second clue would be to watch to
> see the VTP commands, and the order in which you activate them. If the
> VLAN's are pre-built and the primary VTP server will become a switch with
> no
> VLAN's; what have you added to your lab panic time?
>
> The last tip before I go to breakfast, study the switch topology before
> starting to configure the swith network. Expect all sorts of loops,
> mis-configured interfaces, etc.
>
> Merry Christmas and be loop free in 2007.
>
> George Morton, Ph. D.
> ----- Original Message ----- From: "Darby Weaver" <darbyweaver@yahoo.com>
> To: "'Cisco certification'" <ccielab@groupstudy.com>
> Sent: Saturday, December 16, 2006 12:43 PM
> Subject: Prediction - Lab Results
>
>
> I know that there have only been a very few people who
> have passed the lab since the 3-4 switches were
> introduced into the lab this last month or so...
>
> It seems it is always this way after a change, no
> matter how minor.
>
> However, I want to be the first to say that I predict
> that Lab Candidates will begin to pass the lab again
> at or near the same passing rates as before (the new
> labs were introduced last month)as early say...
> within 30 days or so.
>
> I just have a gut feeling... about this.
>
> Anyone care to watch the numbers with me...
>
> Funny how it is all a numbers game in the end.
>
> Merry Christmas and Happy New Year!
>
>
> And I can't wait till my favorite vendors update their
> materials on Switching as well. Not that what they
> have is not pretty good already, but I'm sure they are
> not sleeping at the wheel either.
>
>
> Meanwhile, has anyone taken a look a Cisco Press
> Practical Studies for Switching.
>
> It offers a lot of great insight if you can look past
> the model numbers and get the same great results from
> some 3550/3560's.
>
> _______________________________________________________________________
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> http://www.groupstudy.com/list/CCIELab.html
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