I have a WildCard ACL Confision dilemma :'(

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

Reply to
ws00sw
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Break it down into binary, you will see within minutes.

-Brian

Reply to
Brian V

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