RE: Filtering & Wildcard

From: dwhitley@xxxxxxxxx
Date: Fri Dec 07 2001 - 16:25:05 GMT-3


   
David,

Here is another answer, to your question about the wildcard format. It
depends, are you excepting routes more specific than 140.1.0.0 or not. If
your answer is not, use the 0.0.0.0 wildcard and be done with it. If you
will be excepting more specific routes use the 0.0.255.255 wildcard.

-----Original Message-----
From: Reisner, Tim [mailto:TR126568@exchange.DAYTONOH.NCR.com]
Sent: Friday, December 07, 2001 1:54 PM
To: ccielab@groupstudy.com
Subject: RE: Filtering & Wildcard

It is alittle more than that.

The three address all have a different first octet. 140 141 and 142
This wasn't taken into consideration in any of the responses.

The simplest way to handle it maybe to specify the 3 address seperately.

Tim

-----Original Message-----
From: Wade Edwards [mailto:wade.edwards@powerupnetworks.com]
Sent: Friday, December 07, 2001 12:33 PM
To: Courtney Alexander Foster; David; ccielab@groupstudy.com
Subject: RE: Filtering & Wildcard

Actually it should be:
access-list 1 deny 140.0.0.0 0.0.255.255
access-list 1 permit 140.0.0.0 0.3.255.255

He only wanted 1, 2 and 3.

L8r.
 -----Original Message-----
From: Courtney Alexander Foster [mailto:cfoster@cnr.edu]
Sent: Friday, December 07, 2001 11:44 AM
To: David; ccielab@groupstudy.com
Subject: RE: Filtering & Wildcard

140.0.0.0 0.3.255.255

        -----Original Message-----
        From: David
        Sent: Fri 12/7/2001 12:04 PM
        To: ccielab@groupstudy.com
        Cc:
        Subject: Filtering & Wildcard
        
        

        Guys
        
        If u are asked to allow say 3 routes (140.1.0.0,
        141.2.0.0 & 142.3.0.0) in to your rack from a
        backbone. What type of wildcard would you use in ur
        ACL. Would the following be the best?
        
        access-list 1 permit 140.1.0.0 0.0.0.0
        access-list 1 permit 141.2.0.0 0.0.0.0
        access-list 1 permit 142.3.0.0 0.0.0.0
        
        OR:
        
        access-list 1 permit 140.1.0.0 0.0.255.255
        access-list 1 permit 141.2.0.0 0.0.255.255
        access-list 1 permit 142.3.0.0 0.0.255.255
        
        ?
        
        Thanks
        
        
        
        
        



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