From: Mike O (mikeeo@msn.com)
Date: Fri Sep 30 2005 - 12:13:21 GMT-3
I would have said:
show mac-addresss-table address <mac>
and started my trace back to the source switch.
Thats the long way of doing it. Unless maybe you are on the wrong side of a
L3 link which then the mac would not be in the table. Its an open ended
question that could be answered many ways.
>From: Deep Ratan <deep.ratan@gmail.com>
>Reply-To: Deep Ratan <deep.ratan@gmail.com>
>To: ccielab@groupstudy.com
>Subject: layer-2 interview question
>Date: Fri, 30 Sep 2005 10:48:12 -0400
>
>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
>
>_______________________________________________________________________
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Sun Oct 02 2005 - 14:40:17 GMT-3