RE: ACL question

Hi Bobby,

Let's put these prefixex in binary:

.12 --> 1100
.13 --> 1101
.14 --> 1110

With a wildmask of 0001 you are telling the router to match the 3 most left bits and don't care about the most right bit, so you will be matching anything with 110x. It means you will match .12 (1100) and .13 (1101)

-----Mensaje original-----
De: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] En nombre de Bobby Kimble
Enviado el: lunes, 08 de junio de 2009 18:19
Para: Cisco certification
Asunto: ACL question

Hello All,
I have the following question:

Say I have a router that is receiving the following addresses via rip:

 172.168.15.0/24
.172.168.14.0/24
 172.168.13.0/24
 172.168.12.0/24

If I only want to receive .12 and .13 I would use the following acl:

permit 172.168.12.0 0.0.1.0

What would I use if I only want to receive .13 and .14?

I tried 172.168.13.0 0.0.1.0 , but I am still only receiving .12 and .13.
Where am I going wrong?

-Bobby

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Received on Mon Jun 08 2009 - 18:35:07 ART