Hey all... I'm trying to get my brain around wildcard masking for ACL's and I'm having some trouble... I've gone through a few examples and I understand about half of them, so I'm apparently missing some part of the puzzle... if anyone has time to work out an example based on the information I provided (with some sort of detail), I'd greatly appreciate it...
Say you want to create an ACL to filter traffic from subnet 172.12.45.0 - 172.12.100.0 What would the wildcard mask look like, and how do you do the math to create it? I understand from simpler examples that you find a common bit pattern in whatever octet(s) you're filtering, but I can't reproduce the wildcard mask every time.
This is what I understand:
45 = 00101101
100 = 01100100
So is the wildcard mask 0.0.178.255 OR 0.0.128.255 OR am I completely wrong?
Once again, any help would be appreciated... thanks in advance...
--Paunchy
Say you want to create an ACL to filter traffic from subnet 172.12.45.0 - 172.12.100.0 What would the wildcard mask look like, and how do you do the math to create it? I understand from simpler examples that you find a common bit pattern in whatever octet(s) you're filtering, but I can't reproduce the wildcard mask every time.
This is what I understand:
45 = 00101101
100 = 01100100
So is the wildcard mask 0.0.178.255 OR 0.0.128.255 OR am I completely wrong?
Once again, any help would be appreciated... thanks in advance...
--Paunchy