I have a WildCard ACL Confision dilemma :'(

Jun 29, 2005 1 Replies

Hello I have this problem, with wildcards that I wish to understand



Ok get this one:


  • Access-list 1 permit 131.1.1.0 0.0.254.0 : Permits Odd Routes from 131.1.1.0 to 131.1.255.0 :

But what about this one:


  • Access-list 1 permit 131.1.0.0 0.0.254.0 : It would permit evens routes from 131.1.0.0 to 131.1.254.0:

But WHY????



Also:



Access-list 1 permit 131.1.0.0 0.0.2.0 :: It would permit evens routes but only 131.1.0.0 and 131.1.2.0



And this one Access-list 1 permit 131.1.1.0 0.0.2.0 :: it would permit Odds routes but only 0 and 1



Please does any one have the answer for this dilemma, it have to do this in black and white (not using any tool)!



Thanks


Break it down into binary, you will see within minutes.

-Brian

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