From: Victor Cappuccio (cvictor@protokolgroup.com)
Date: Fri Feb 24 2006 - 20:23:50 GMT-3
I do not know if this is correct, but do not take this as correct, so
from my understanding
A network, say 200.33.44.0 you know that the natural class is /24
So now you can ask your self, ok I can have networks like a /25, /26, ..
/31 or even a host address /32
so if I what to deny networks with /25 I will need for example a
prefix-list matching does networks and then permitting
(0.0.0.0/0 le 32=) the rest
Just break into binary the subnet part of the network and take out the
networks and you will see that by 0 and 1 forming a kind of grid
Also IE has in their WB Solution Guide an excellent resource for
learning not only the prefix-list logic, but it makes you understand the
logic of the use of the prefix list in combination with the use of
access-list
HTH
Victor.
jnkmail4eva@yahoo.com escribis:
> I am having a hard time understanding prefix-list.
> Does anyone have a good link or tutorial on it.
>
> Thanks in advance.
>
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