From: Wes Stevens (wrsteve33-gsccie@yahoo.com)
Date: Mon Nov 24 2008 - 20:28:22 ARST
I wonder how many really understand crossbar switching as it relates to memory access (not that you have to understand it at a deep level to use it)?
Here is a couple of decent links:
http://iram.cs.berkeley.edu/kozyraki/project/ee241/report/crossbar.html
http://www.nvnews.net/previews/geforce3/lightspeed_memory.shtml
I was working for Convex computers back in the late 80's. They were the first to implement this and really cleaned the competitions clock with it for a while - till Cray caught up. Now as you can see they are used on almost everything down to the video cards.
I remember seeing the first memory board with 128 megs of memory on it at about the same time. It had 64k modules on every inch of both sides and it was 2 feet wide by 2 1/2 feet deep. The cost? $250k.
Things have come a long ways...
----- Original Message ----
From: Joseph Brunner <joe@affirmedsystems.com>
To: Nki <nkionlab@yahoo.co.uk>; ccielab@groupstudy.com; Patrick J Greene <patrickg@layer8llc.com>
Sent: Monday, November 24, 2008 3:08:59 PM
Subject: RE: CCIE True Interview Story
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? In my opinion, your question is quite vague and does not assess
his
CCIE background. 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. 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. 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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