just an FYI - don't panic

In message <199505111942.PAA25372 at lovefm.reston.mci.net>, Tony Bates writes:
> Curtis,
> 	whay cant these lines be broken up with the current RIPE-181
> line wrap rules ?
> 
> 		--Tony.

Because

   ASxxx AND NOT { 1 2 3 4 5 }

does not equal

   ASxxx AND NOT { 1 2 3 }
   ASxxx AND NOT { 4 5 }

In other words:

   A AND NOT ( B OR C )

	!=

   ( A AND NOT B ) OR ( A AND NOT C )

   for example:	A = 1 2 3 4 5
		B = 1 2
		C = 3

   A AND NOT ( B OR C )			-> 4 5

   ( A AND NOT B )			-> 3 4 5
   ( A AND NOT C )			-> 1 2 4 5
   ( A AND NOT B ) OR ( A AND NOT C )	-> 1 2 3 4 5

Is that clear?

The problem is in lists where ASxxx expands to a few thousand networks
and there are perhaps a dozen legitimate exceptions (like DMZs) that
get slightly different treatment.

Curtis



-------- Logged at  Fri May 12 00:57:30 MET DST 1995  ---------