Most efficient ACL to match multiple networks - easier way?

From: elias.chari@gmail.com
Date: Sun Jun 04 2006 - 14:29:02 ART

Hi Group,

I guess you have all come across a requirement to match multiple networks with a one line ACL.

I understand the theory i.e AND operation to get the network part and X-OR for the wildcard. Now writting out all the networks in binary and doing the operations is time consuming and quite easy to make a mistake when under pressure.

I have tried to work it out using the AND and X-OR functions on the MS calculator and whilst it woks ok for the AND operation for multiple networks, it fails on the X-OR function as it does a comparison of two networks at at time.

Has anybody worked out how to get the calculator to compare multiple numbers using the X-OR function?

BTW it works for AND when using the networks in decimal format...-)

If we crack this, it could potentially save us quite a bit of time.

Regards,
Elias
PS - The equation for an X-OR gate (for those not familiar with it and may be interested) is:
          __
Y = (A+B)(AB)

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