From: Montiean (noktes@bellsouth.net)
Date: Sun Oct 30 2005 - 21:01:23 GMT-3
Thanks guys for all the feedback..This is kind of frustate me sometime cause
we don't know which one the lab really want. Maybe only me :) I am sure that
in doubt, we will ask proctor but let assume I have 2-3 solutions in each
every questions. This is going to be the pain walking forth and back to
proctor.
From the question, again let assume that we will use prefix list instead.
So If I use
ip prefix-list test permit 192.168.20.0/22 ge 24 le 24
or
ip prefix-list test permit 192.168.20.0/22 le 24
The routing filter result is going to be the same. I guess. Is the script
that cisco use to check the lab is going to be that smart not to throw away
my point. :)
Thanks again,
Montiean
----- Original Message -----
From: "Dave Temkin" <dave@ordinaryworld.com>
To: "Montiean" <noktes@bellsouth.net>
Cc: <ccielab@groupstudy.com>
Sent: Sunday, October 30, 2005 6:36 PM
Subject: Re: wildcard mask question
>I would say if they say "Only allow x.x.x.x/24", then you should go with
> 0.0.3.0 , because otherwise you could potentially allow /24 and larger
> prefixes with the ACL.
>
> -Dave
>
> On Sun, 30 Oct 2005, Montiean wrote:
>
>> Folks,
>> Just want to get the idea on wildcard mask using acl in the lab.
>> For an example, let say we need to use only one statement in acl to
>> filter
>> routes below
>>
>> 192.168.20.0/24
>> 192.168.21.0/24
>> 192.168.22.0/24
>> 192.168.23.0/24
>>
>> So we can use either ways as below
>>
>> access-list 1 permit 192.168.20.0 0.0.3.0
>> or
>> access-list 1 permit 192.168.20.0 0.0.3.255
>>
>> The result is going to be the same but which way should be right in the
>> lab.
>> Any comments would be appreciate.
>>
>> Thanks,
>> Montiean
>>
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