Hi All,

 

Need some help on ACL calculation. This is general ACL filtering scenario.

 

I'm just practicing on ACL filtering especially on the non-continuous
wildcards.

 

i've injected this to my test router but i don't seem to get the logic why
it's this wildcard. can somebody enlighten me on this?

 

I know 0 in the wildcard are care bits and 1 don't care, just the opposite
of a subnet mask.

 

Example Scenario:

 

I get this networks from a backbone router:

 

network 10.10.10.0

network 10.10.11.0

network 10.10.12.0

network 10.10.13.0

network 10.10.14.0

network 10.10.15.0

network 10.10.16.0

 

I want to filter on the third octet and allow only 10, 13, 14 to come in

 

been playing with various values on the wildcard, and the working value is
0.0.4.0 , WHY????

 

 

Kind Regards,

Antonio

 

 

 

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