From: Chris (clarson52@comcast.net)
Date: Fri Oct 14 2005 - 00:51:20 GMT-3
Good call. Probably not what the interviewer is looking for, but I think it
should be given some credit by the interviewer. I always ask what tools are
available for network management and troubleshooting. It can provide a good
clue as to how serious or how much emphasis a company places on IT or their
network.
--------------------------------------------------
Christopher Larson CCIE#12380, PMP
Superior Technology Networks Corp
www.supertechnetworks.com - Technology Consulting
www.ccierackrental.com -Cisco Rack Rental
tel: 703 577 3303 fax: 703 286 5018
--------------------------------------------------
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
James Matrisciano
Sent: Friday, September 30, 2005 11:23 AM
To: Sheahan, John; Deep Ratan; ccielab@groupstudy.com
Subject: RE: layer-2 interview question
I would have been a smart ass and asked for the network documentation that
should already show where it is, or the network managemnt big picture from
cisco works or something like that.... But those answers are good too :)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Sheahan, John
Sent: Friday, September 30, 2005 11:17 AM
To: Deep Ratan; ccielab@groupstudy.com
Subject: RE: layer-2 interview question
"sh cam dyn" will show you all mac addresses that the switch knows about
from a layer two persective. That includes machines plugged into hubs that
are plugged into switch. It will also know about mac addresses on other
switches that are trunked to the switch.
If you are running IOS, you can easily sort through 10,000 mac addresses
with the following command:
"sh mac-address-table | begin 0009.b7e0.c2e"
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Deep
Ratan
Sent: Friday, September 30, 2005 11:04 AM
To: ccielab@groupstudy.com
Subject: Re: layer-2 interview question
does "show cam" display mac address of A) machines directly connected to the
switch ports of the switch or B) machines on all vlans across all switches
in those vlans?
If B) is true, the output of that command could have 10,000 entries.
On 9/30/05, Adam S. Roth <adam@therothfamily.net> wrote:
>
> Show cam
>
> This email message and any attachments are intended for the use of the
> addressee(s) indicated above. Information that is privileged or
otherwise
> confidential may be contained herein. If you are not the intended
> recipient(s), you are hereby notified that any dissemination, review,
or
> use
> of this message, documents, or information contained herein is
strictly
> prohibited.
>
>
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Deep
> Ratan
> Sent: Friday, September 30, 2005 10:48 AM
> To: ccielab@groupstudy.com
> Subject: layer-2 interview question
>
>
> Hi Everyone,
> Sorry to ask a networking-101 question but being a WAN guy, I haven't
been
> working with switches in the past few years. An interviewer asked me
this
> question, "If I give you a MAC address that is causing a broadcast
storm,
> how will you locate the culprit in a switched environment that has
several
> dozen switches and routers?"
>
> I replied, "You'll need to give me a layer-3 address so I can trace it
to
> the right switch/router and then look up the ARP table to see on what
port
> the offending machine lives" The interviewer didn't like the answer.
In
> retrospect, I should probably have said, "A broadcast storm renders
the
> network unusable, so I'll start with looking at my network management
> station to see what LAN segment is giving off a critical alarm"
>
> Anyway, my question to members of groupstudy is this: In an
environment
> with
> several dozen switches, if you're given just a MAC address, can you
find
> out
> where the machine lives?
>
> thanks, Deep
>
>
This archive was generated by hypermail 2.1.4 : Sun Nov 06 2005 - 22:00:50 GMT-3