RE: Prefix List Question

From: Scott Morris (smorris@ipexpert.com)
Date: Wed Sep 26 2007 - 20:54:26 ART


That would work, although after working through that you realize why prefix
lists were created. :)

-----Original Message-----
From: Joseph Brunner [mailto:joe@affirmedsystems.com]
Sent: Wednesday, September 26, 2007 4:55 PM
To: 'Scott Morris'; 'groupstudy email'; ccielab@groupstudy.com
Subject: RE: Prefix List Question

Scott would the acl be?

access-list 101 permit ip 2.0.0.0 0.1.255.255 255.254.0.0 0.1.255.255

help!

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Scott Morris
Sent: Wednesday, September 26, 2007 4:37 PM
To: 'groupstudy email'; ccielab@groupstudy.com
Subject: RE: Prefix List Question

It permits routes where the network portion is from 2.0.0.0 to 2.1.255.255
and the network mask is less than or equal to 32 bits (15-32)

There are two pieces to a prefix list. One says the "network/route" is
within a particular range. The second will give criteria about mask length.

HTH,

 
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE-M
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-ER
VP - Technical Training - IPexpert, Inc.
IPexpert Sr. Technical Instructor
 
A Cisco Learning Partner - We Accept Learning Credits!
 
smorris@ipexpert.com
 
Telephone: +1.810.326.1444
Fax: +1.810.454.0130
http://www.ipexpert.com

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
groupstudy email
Sent: Wednesday, September 26, 2007 2:56 PM
To: ccielab@groupstudy.com
Subject: Prefix List Question

Guys,

I have a quick question on prefix-lists. It is difficult to find good info
on this.

What exactly does this line do:

ip prefix-list test seq 300 permit 2.0.0.0/15 le 32

What ranges does it cover.

I'm really confused by this.

Thanks in advance.

S. Rick



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