From: Darby Weaver (ccie.weaver@gmail.com)
Date: Mon Nov 24 2008 - 22:20:42 ARST
Jian,
Yes Spanning-Tree is still out there. Some people now use L3 and route all
the way down to the access layer simply because they can and to get around
the usage of any Spanning-Tree, Rapid or not.
But again the core concepts are something we all still need to be in touch
with to perform the job. The concepts from Network+ are still relevant at
the CCIE level. As are many A+ concepts for that matter. A CCIE does not
explicitly get measured on these concepts, but I assure you a CCIE is
expected to know the length of a Cat 5 Cable, Simple/Duplex, SC versus ST,
etc. Even though LC is now very common in newer gear.
People consider the CCIE or near-CCIE on staff to be the last line of
defense for their networks and their business. It's pretty serious stuff.
And at the very least a CCIE or CCIE candidate is expected to come to the
table with the beans and the butter, not just the spoon and fork, if he/she
expects to get the bread - if you know what I mean.
At least that's my experience. As I sit here tonight and ponder the true
meaning of QoS and the SRND on Video Conferencing and thinking of why there
is a diversity of when to assign Video into a priority queue verus not
assigning it to a priority queue. Even though TX-Queue 3 is the priority
queue on the 4500 series and yet... I find that the traffic marked with AF41
or Diffserv 32 or COS 4 is prioritized as Normal versus High Priority.
I do understand the conventional wisdom that we do not want Interactive
Video Traffic to starve the Voice Queue if both are placed in the priority
queue. Hmmm... but the SRND I just finished reading seems to say what I'm
thinking and I probably do need to classify my interactive video traffic as
high priority traffic, police it and then allow for a burst as well.
I wonder how often a scenario like this comes up on an interview? Wait I
think it did... at this one and I think I made the argument for not putting
video traffic in the high priority queue since it might starve the voice
traffic and in my child-like innocence did not consider the other beastly
traffic that might reside in the normal queue... like those desktop dudes
and their puching and pulling 6GB+ images around...
Of course, there is the argument for 2 priority queues so as to
differentiate between the two, voice and video that is and further massage
the traffic.
Decisions.
On 11/24/08, Jian Gu <guxiaojian@gmail.com> wrote:
>
> People are still using spanning tree, shouldn't they use rapid spanning
> tree
> such that you don't have to worry about stone age configuration like port
> fast/uplink fast/backbone fast?
>
> On Mon, Nov 24, 2008 at 1:43 PM, Nki <nkionlab@yahoo.co.uk> wrote:
>
> > I asked the same guy, when would you enable spanning tree portfast on
> ports
> > connected between two switches. He rightly said you should not do that. I
> > asked why and he could not answer it. These were some of the basic
> > questions.
> > Trust me I did not go hard at him.
> > B
> > I am a bit surprised that I sense some member running to his defence. I
> > personally was embarrased and I am not the brightest of lads
> >
> > --- On Mon, 24/11/08, Pavel Bykov <slidersv@gmail.com> wrote:
> >
> > From: Pavel Bykov <slidersv@gmail.com>
> > Subject: Re: CCIE True Interview Story
> > To: "Joseph Brunner" <joe@affirmedsystems.com>
> > Cc: "Nki" <nkionlab@yahoo.co.uk>, ccielab@groupstudy.com, "Patrick J
> > Greene"
> > <patrickg@layer8llc.com>
> > Date: Monday, 24 November, 2008, 9:32 PM
> >
> >
> > Sorry Joseph, but this is not CCIE-related.
> > One of the Cisco courses I teach is CAT6KS, or "Catalyst 6500
> > Implementation
> > for Data Center Buss. Solut." So I could easily answer those questions
> > waken
> > up at 5am after alcohol-heavy party.
> >
> > CCIE never teaches you hardware architecture, which the course I
> mentioned
> > does.
> >
> > From my experience, questions asked only represent the knowledge of the
> > subject pertaining to the questions asked.
> > If I asked you a question "In the output of "show bootvar" command, what
> > does
> > the number after IOS image mean? e.g.
> > "c2800nm-advipservicesk9-mz.124-8.bin,2"
> > would you know the answer exactly that instance? And how much about you
> > would
> > that tell me?
> >
> >
> >
> > On Mon, Nov 24, 2008 at 10:08 PM, Joseph Brunner <
> joe@affirmedsystems.com>
> > wrote:
> >
> > The best interviews I have seen come from the (former) financial sector;
> > The best firms a few years ago (Merrill, Morgan) always ask for hardware
> > and
> > IOS architecture questions from "CCIE" level guys...
> >
> > What is crossbar switching?
> > What is DCEF?
> > How does DCEF work?
> > What benefit does a fabric enabled module have?
> > What are some reasons traffic would result in a CEF punt? Or a glean adj?
> > How could you prevent these issues? Would they affect performance?
> >
> > You are building a new datacenter, what line card would use for 10Gbps to
> a
> > san for a 6509-E, etc. Why would you use that line card? What QOS
> structure
> > do the ports offer?
> >
> > Why does the SUP-720 have 2x40Gbps per blade?
> >
> > How does the FWSM work? How does the CSM work?
> >
> > What is the different between shared and redundant power in the 6509-E
> > chassis?
> >
> > They also showed printouts of "show ip bgp summary" and "show ip ospf
> > database" and asked the candidate to explain in as much detail as
> possible
> > what is going on...
> >
> > They were really really good technical interviews!!!
> >
> > I was so impressed with the interviews I knew they were serious. I felt
> > challenged and required before we even talked money...
> >
> > -Joe
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> > Nki
> >
> >
> >
> > Sent: Monday, November 24, 2008 4:01 PM
> > To: ccielab@groupstudy.com; Patrick J Greene
> > Subject: RE: CCIE True Interview Story
> >
> > if you read carefully I had mentioned I asked him basic routing and
> > switching
> > question and he did poorly in all questions. The question posted here was
> > the
> > last I asked. I can tell you now that most people reading this have not
> > forgotten why you would use a switch in comparison to a hub. i think this
> > was
> > thought at the CCNA level
> > B
> >
> >
> > --- On Mon, 24/11/08, Patrick J Greene <patrickg@layer8llc.com> wrote:
> >
> > From: Patrick J Greene <patrickg@layer8llc.com>
> > Subject: RE: CCIE True Interview Story
> > To: "ccielab@groupstudy.com" <ccielab@groupstudy.com>
> > Date: Monday, 24 November, 2008, 8:28 PM
> >
> > In all fairness, what are you trying to evaluate, his experience or
> > specific
> > tasks oriented around the knowledge he should have retained through his
> > CCIE
> > journey? B In my opinion, your question is quite vague and does not
> assess
> > his
> > CCIE background. B If you want to test his CCIE prowess ask him how he
> > might
> > secure the environment so no devices can talk to each other but the
> router
> > interface and you don't use ACL's. B As you know, that is what the CCIE
> > tests for, how to accomplish task-a,b and c given requirements and
> > restrictions
> > x,y, and z. B In y opinion I would re-evaluate the interview questions.
> >
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> > Nki
> > Sent: Monday, November 24, 2008 3:09 PM
> > To: ccielab@groupstudy.com
> > Subject: CCIE True Interview Story
> >
> > I interviewed this CCIE from Saudi. He just became one this september and
> > his
> > name is Ali. From basic switching and routing questions, he did very
> poorly
> > in
> > his answers.The one that really stumped I and my manager was the
> following
> > question.Q. Ali you have been assigned a ticket to install a Cisco router
> > for
> > Internet connection. The customer site have 10 users, with a 24 port hub
> > installed.The network is operating well with no errors. After you complet
> > your WAN router install, what recommendation can you make to the customer
> > concerning their HUB.A. I will ask them to rplace it with a switchQ. Ali
> > what
> > is your reason for this recommendation.Ali could not come up with one.
> Here
> > I
> > am a dual CCIE sitting with my boss, I felt my number shrink in
> > embarassment.B What is going on here, are guys out there buying their
> CCIE?
> > If
> > they are at least read the study guides.B B
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
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> >
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> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > --
> > Pavel Bykov
> > ----------------
> > Don't forget to help stopping the braindumps, use of which reduces value
> of
> > your certifications. Sign the petition at http://www.stopbraindumps.com/
> >
> >
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> >
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>
>
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>
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