From: Jared Scrivener (jscrivener@ipexpert.com)
Date: Wed Jan 28 2009 - 19:27:59 ARST
Hey Praveen,
I'm not familiar with IE's labs, but generally if you see a reference to
"silently discarding packets" you are probably being directed to use
control-plane policing with the silent discard feature. This is enabled
automatically if you are using outbound control-plane policing.
Silent discarding is generally used to ensure that messages aren't being
sent back to the sender of denied packets. This is done to help avoid
network reconnaissance attacks.
Without seeing the specific question, that's the best suggestion I can
offer.
Cheers,
Jared Scrivener CCIE3 #16983 (R&S, Security, SP), CISSP
Technical Instructor - IPexpert, Inc.
Telephone: +1.810.326.1444
Fax: +1.810.454.0130
Mailto: jscrivener@ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Sharma, Praveen
Sent: Wednesday, 28 January 2009 4:17 PM
To: ccielab@groupstudy.com
Subject: IEWB Lab13 Vol 2 - Task 7.1
Hi GS,
I got confused with this statement in access-list example
"Silently Discard packet that denied".
To be more specific it is Vol II 4.1 Lab 13 7.1.
Thanks
Praveen
Blogs and organic groups at http://www.ccie.net
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