RE: Summarization of Routes

From: Craig Tompkins (craig.tompkins@verizon.net)
Date: Wed Oct 09 2002 - 22:29:59 GMT-3


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It all depends on the actual question and what you are excluded from
doing.
It may be really that you can cut it back to /16 and accomplish this.
 But can you go even farther back? Also the question may say
summarize only the network included, which then means you cant go
back that far because you would be summarizing more than is shown.
So there is not really an easy answer as it depends on what you are
excluded from doing. So make sure you look out for these exclusions.
 Such as summarize using shortest mask only the network below. Or
something that says to specifically exclude a specific net.

Craig W. Tompkins
Network Engineer
Temecula, CA 92592
760.583.6544

"The credit belongs to the man who is actually in the arena, whose
face is marred by dust and sweat and blood; who strives valiantly;
who errs and comes short again and again, who knows the great
enthusiasms, the great devotions, and spends himself in a worthy
cause; who at best, knows the triumph of high achievement; and who,
at the worst, if he fails, at least fails while daring greatly, so
that his place shall never be with those cold and timid souls who
know neither victory nor defeat."
- -Theodore Roosevelt, "Citizen in a Republic", April 23, 1910

- -----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of Paglia, John (USPC.PCT.Hopewell)
Sent: Wednesday, October 09, 2002 4:47 PM
To: 'ccielab@groupstudy.com'
Subject: Summarization of Routes

What is the real meaning of the question 'summarize to the shortest
possible
mask'?

Example...suppose I am asked to 'summarize the routes received using
the
SHORTEST POSSIBLE MASK', and these are the routes received:

192.168.20.1 /24
192.168.50.1 /24
192.168.100.1 /24
192.168.190.1 /24

My knee-jerk reaction was to go with 192.168.0.0 /16, but upon
further
thought, I could also summarize to a /13 mask and be able to ping all
the
above 'nets.

Do ya think it would be wrong to do this on the test if it comes up,
thus
setting myself up for disaster? The 'shortest possible mask' stmnt.
is
really bothering me. Opinions please.

Thanks,
John

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